From c53e97ea6428f4fd70184a4f09258af246d3d821 Mon Sep 17 00:00:00 2001
From: Jordy van Dortmont <jordy@jordyvandortmont.com>
Date: Wed, 13 Apr 2022 22:00:11 +0200
Subject: [PATCH] FileLoader: Update documentation for onProgress callback

---
 docs/api/en/loaders/AnimationLoader.html         | 2 +-
 docs/api/en/loaders/AudioLoader.html             | 2 +-
 docs/api/en/loaders/BufferGeometryLoader.html    | 2 +-
 docs/api/en/loaders/CompressedTextureLoader.html | 2 +-
 docs/api/en/loaders/DataTextureLoader.html       | 2 +-
 docs/api/en/loaders/FileLoader.html              | 2 +-
 docs/api/en/loaders/Loader.html                  | 2 +-
 docs/api/en/loaders/MaterialLoader.html          | 2 +-
 docs/api/en/loaders/ObjectLoader.html            | 2 +-
 docs/examples/en/loaders/3DMLoader.html          | 2 +-
 docs/examples/en/loaders/DRACOLoader.html        | 2 +-
 docs/examples/en/loaders/FontLoader.html         | 2 +-
 docs/examples/en/loaders/GLTFLoader.html         | 2 +-
 docs/examples/en/loaders/KTX2Loader.html         | 2 +-
 docs/examples/en/loaders/LDrawLoader.html        | 2 +-
 docs/examples/en/loaders/MMDLoader.html          | 6 +++---
 docs/examples/en/loaders/MTLLoader.html          | 2 +-
 docs/examples/en/loaders/OBJLoader.html          | 2 +-
 docs/examples/en/loaders/PCDLoader.html          | 2 +-
 docs/examples/en/loaders/PDBLoader.html          | 2 +-
 docs/examples/en/loaders/PRWMLoader.html         | 2 +-
 docs/examples/en/loaders/SVGLoader.html          | 2 +-
 docs/examples/en/loaders/TGALoader.html          | 2 +-
 docs/examples/zh/loaders/DRACOLoader.html        | 2 +-
 docs/examples/zh/loaders/PDBLoader.html          | 2 +-
 docs/examples/zh/loaders/PRWMLoader.html         | 2 +-
 docs/examples/zh/loaders/SVGLoader.html          | 2 +-
 docs/examples/zh/loaders/TGALoader.html          | 2 +-
 28 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/docs/api/en/loaders/AnimationLoader.html b/docs/api/en/loaders/AnimationLoader.html
index 136006b16518d0..af1096452058ad 100644
--- a/docs/api/en/loaders/AnimationLoader.html
+++ b/docs/api/en/loaders/AnimationLoader.html
@@ -64,7 +64,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:AnimationClip animation clips].<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called if load errors.<br /><br />
 
 		Begin loading from url and pass the loaded animation to onLoad.
diff --git a/docs/api/en/loaders/AudioLoader.html b/docs/api/en/loaders/AudioLoader.html
index 1a29147d6c7971..85ea5d5d22d01b 100644
--- a/docs/api/en/loaders/AudioLoader.html
+++ b/docs/api/en/loaders/AudioLoader.html
@@ -81,7 +81,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded text response.<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br />
 		</p>
 		<p>
diff --git a/docs/api/en/loaders/BufferGeometryLoader.html b/docs/api/en/loaders/BufferGeometryLoader.html
index 72aeea2cf27db5..28ccc9d15f5e86 100644
--- a/docs/api/en/loaders/BufferGeometryLoader.html
+++ b/docs/api/en/loaders/BufferGeometryLoader.html
@@ -73,7 +73,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].d<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:BufferGeometry].<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br />
 		</p>
 		<p>
diff --git a/docs/api/en/loaders/CompressedTextureLoader.html b/docs/api/en/loaders/CompressedTextureLoader.html
index 067a8a9081979d..b580724a34842f 100644
--- a/docs/api/en/loaders/CompressedTextureLoader.html
+++ b/docs/api/en/loaders/CompressedTextureLoader.html
@@ -45,7 +45,7 @@ <h3>[method:CompressedTexture load]( [param:String url], [param:Function onLoad]
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] (optional) — Will be called when load completes. The argument will be the loaded texture.<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br />
 		</p>
 		<p>
diff --git a/docs/api/en/loaders/DataTextureLoader.html b/docs/api/en/loaders/DataTextureLoader.html
index f269f522de80e8..3561588ad25c04 100644
--- a/docs/api/en/loaders/DataTextureLoader.html
+++ b/docs/api/en/loaders/DataTextureLoader.html
@@ -45,7 +45,7 @@ <h3>[method:DataTexture load]( [param:String url], [param:Function onLoad], [par
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] (optional) — Will be called when load completes. The argument will be the loaded texture.<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses.The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br />
 		</p>
 		<p>
diff --git a/docs/api/en/loaders/FileLoader.html b/docs/api/en/loaders/FileLoader.html
index 5d3365621243fe..54e5a98ab9cffe 100644
--- a/docs/api/en/loaders/FileLoader.html
+++ b/docs/api/en/loaders/FileLoader.html
@@ -79,7 +79,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 			[page:String url] — the path or URL to the file. This can also be a
 				[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 			[page:Function onLoad] (optional) — Will be called when loading completes. The argument will be the loaded response.<br />
-			[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+			[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 			[page:Function onError] (optional) — Will be called if an error occurs.<br /><br />
 
 			Load the URL and pass the response to the onLoad function.
diff --git a/docs/api/en/loaders/Loader.html b/docs/api/en/loaders/Loader.html
index a1f1dc45204fd5..20877e19b2a57d 100644
--- a/docs/api/en/loaders/Loader.html
+++ b/docs/api/en/loaders/Loader.html
@@ -70,7 +70,7 @@ <h3>[method:undefined load]()</h3>
 		<h3>[method:Promise loadAsync]( [param:String url], [param:Function onProgress] )</h3>
 		<p>
 		[page:String url] — A string containing the path/URL of the file to be loaded.<br />
-		[page:Function onProgress] (optional) — A function to be called while the loading is in progress. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		</p>
 		<p>
 		This method is equivalent to [page:.load], but returns a [link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise Promise].
diff --git a/docs/api/en/loaders/MaterialLoader.html b/docs/api/en/loaders/MaterialLoader.html
index 687be36c61cfb7..bda69aaf1d2659 100644
--- a/docs/api/en/loaders/MaterialLoader.html
+++ b/docs/api/en/loaders/MaterialLoader.html
@@ -67,7 +67,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:Material].<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br /><br />
 
 		Begin loading from url.
diff --git a/docs/api/en/loaders/ObjectLoader.html b/docs/api/en/loaders/ObjectLoader.html
index afd1edcf02efff..ce1712b5fba136 100644
--- a/docs/api/en/loaders/ObjectLoader.html
+++ b/docs/api/en/loaders/ObjectLoader.html
@@ -77,7 +77,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:Object3D object].<br />
-		[page:Function onProgress] (optional) — Will be called while load progresses. The argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] (optional) — Will be called when load errors.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/3DMLoader.html b/docs/examples/en/loaders/3DMLoader.html
index a2b90b23200723..a5aeab910e804c 100644
--- a/docs/examples/en/loaders/3DMLoader.html
+++ b/docs/examples/en/loaders/3DMLoader.html
@@ -165,7 +165,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.3dm</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/DRACOLoader.html b/docs/examples/en/loaders/DRACOLoader.html
index 76e4d2da15dc01..36f3fe37a27da4 100644
--- a/docs/examples/en/loaders/DRACOLoader.html
+++ b/docs/examples/en/loaders/DRACOLoader.html
@@ -108,7 +108,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.drc</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/FontLoader.html b/docs/examples/en/loaders/FontLoader.html
index 5aa300b0d7ad33..fb318e84ed53ea 100644
--- a/docs/examples/en/loaders/FontLoader.html
+++ b/docs/examples/en/loaders/FontLoader.html
@@ -71,7 +71,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		[page:String url] — the path or URL to the file. This can also be a
 			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />
 		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded font.<br />
-		[page:Function onProgress] — Will be called while load progresses. The argument will be the XMLHttpRequest instance, which contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — Will be called when load errors.<br /><br />
 
 		Begin loading from url and pass the loaded [page:Texture texture] to onLoad.
diff --git a/docs/examples/en/loaders/GLTFLoader.html b/docs/examples/en/loaders/GLTFLoader.html
index 57b8cbcc11cfce..d29ae576ecc92d 100644
--- a/docs/examples/en/loaders/GLTFLoader.html
+++ b/docs/examples/en/loaders/GLTFLoader.html
@@ -193,7 +193,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.gltf</em> or <em>.glb</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed. The function receives the loaded JSON response returned from [page:Function parse].<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/KTX2Loader.html b/docs/examples/en/loaders/KTX2Loader.html
index 60113d61966301..e6e4e59af1441d 100644
--- a/docs/examples/en/loaders/KTX2Loader.html
+++ b/docs/examples/en/loaders/KTX2Loader.html
@@ -84,7 +84,7 @@ <h3>[method:CompressedTexture load]( [param:String url], [param:Function onLoad]
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.basis</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/LDrawLoader.html b/docs/examples/en/loaders/LDrawLoader.html
index 5c60ed29d49c17..321fe0a8523182 100644
--- a/docs/examples/en/loaders/LDrawLoader.html
+++ b/docs/examples/en/loaders/LDrawLoader.html
@@ -144,7 +144,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the LDraw file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed. The function receives the loaded JSON response returned from [page:Function parse].<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/MMDLoader.html b/docs/examples/en/loaders/MMDLoader.html
index 20570eeceaaa8d..ccf603e2bc9806 100644
--- a/docs/examples/en/loaders/MMDLoader.html
+++ b/docs/examples/en/loaders/MMDLoader.html
@@ -75,7 +75,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.pmd</em> or <em>.pmx</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
@@ -87,7 +87,7 @@ <h3>[method:undefined loadAnimation]( [param:String url], [param:Object3D object
 		[page:String url] — A string or an array of string containing the path/URL of the <em>.vmd</em> file(s).If two or more files are specified, they'll be merged.<br />
 		[page:Object3D object] — [page:SkinnedMesh] or [page:Camera]. Clip and its tracks will be fitting to this object.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
@@ -99,7 +99,7 @@ <h3>[method:undefined loadWithAnimation]( [param:String modelUrl], [param:String
 		[page:String modelUrl] — A string containing the path/URL of the <em>.pmd</em> or <em>.pmx</em> file.<br />
 		[page:String vmdUrl] — A string or an array of string containing the path/URL of the <em>.vmd</em> file(s).<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/MTLLoader.html b/docs/examples/en/loaders/MTLLoader.html
index 88d11f5039a29d..ea2ef2e27ae1f5 100644
--- a/docs/examples/en/loaders/MTLLoader.html
+++ b/docs/examples/en/loaders/MTLLoader.html
@@ -36,7 +36,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 			[page:String url] — A string containing the path/URL of the <em>.mtl</em> file.<br />
 			[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:MTLLoaderMaterialCreator MTLLoader.MaterialCreator] instance.<br />
-			[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+			[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 			[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/OBJLoader.html b/docs/examples/en/loaders/OBJLoader.html
index b20adb1b91cac0..3e89f50a7119ad 100644
--- a/docs/examples/en/loaders/OBJLoader.html
+++ b/docs/examples/en/loaders/OBJLoader.html
@@ -74,7 +74,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.obj</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:Object3D] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The function receives a XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/PCDLoader.html b/docs/examples/en/loaders/PCDLoader.html
index 575a656358d6c7..dd63df25df1611 100644
--- a/docs/examples/en/loaders/PCDLoader.html
+++ b/docs/examples/en/loaders/PCDLoader.html
@@ -78,7 +78,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.pcd</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives loaded [page:Object3D] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/PDBLoader.html b/docs/examples/en/loaders/PDBLoader.html
index c6f5239168a7a2..58fb3525504635 100644
--- a/docs/examples/en/loaders/PDBLoader.html
+++ b/docs/examples/en/loaders/PDBLoader.html
@@ -75,7 +75,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.pdb</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives the object having the following properties. [page:BufferGeometry geometryAtoms], [page:BufferGeometry geometryBonds] and the [page:Object JSON] structure.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/PRWMLoader.html b/docs/examples/en/loaders/PRWMLoader.html
index a8c3f786c52c5f..394ab9633c80da 100644
--- a/docs/examples/en/loaders/PRWMLoader.html
+++ b/docs/examples/en/loaders/PRWMLoader.html
@@ -76,7 +76,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.prwm</em> file. Any <em>*</em> character in the URL will be automatically replaced by <em>le</em> or <em>be</em> depending on the platform endianness.<br />
 		[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:BufferGeometry] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The function receives a XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/SVGLoader.html b/docs/examples/en/loaders/SVGLoader.html
index a0394f41446c17..e7900b5e785338 100644
--- a/docs/examples/en/loaders/SVGLoader.html
+++ b/docs/examples/en/loaders/SVGLoader.html
@@ -97,7 +97,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.svg</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives an array of [page:ShapePath] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/en/loaders/TGALoader.html b/docs/examples/en/loaders/TGALoader.html
index 99c95ff808c328..30d63b1257c02b 100644
--- a/docs/examples/en/loaders/TGALoader.html
+++ b/docs/examples/en/loaders/TGALoader.html
@@ -76,7 +76,7 @@ <h3>[method:DataTexture load]( [param:String url], [param:Function onLoad], [par
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.tga</em> file. <br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives loaded [page:DataTexture] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains .[page:Integer total] and .[page:Integer loaded] bytes. If the server does not set the Content-Length header; .[page:Integer total] will be 0.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/zh/loaders/DRACOLoader.html b/docs/examples/zh/loaders/DRACOLoader.html
index 5377e9d39438cf..e06373889aaa98 100644
--- a/docs/examples/zh/loaders/DRACOLoader.html
+++ b/docs/examples/zh/loaders/DRACOLoader.html
@@ -103,7 +103,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.drc</em> file.<br />
 		[page:Function onLoad] — A function to be called after the loading is successfully completed.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, that contains .[page:Integer total] and .[page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/zh/loaders/PDBLoader.html b/docs/examples/zh/loaders/PDBLoader.html
index 4ccd2565524414..c04a879a37daed 100644
--- a/docs/examples/zh/loaders/PDBLoader.html
+++ b/docs/examples/zh/loaders/PDBLoader.html
@@ -75,7 +75,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.pdb</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives the object having the following properties. [page:BufferGeometry geometryAtoms], [page:BufferGeometry geometryBonds] and the [page:Object JSON] structure.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/zh/loaders/PRWMLoader.html b/docs/examples/zh/loaders/PRWMLoader.html
index 3058ccc706c371..6b36ccc96dace8 100644
--- a/docs/examples/zh/loaders/PRWMLoader.html
+++ b/docs/examples/zh/loaders/PRWMLoader.html
@@ -76,7 +76,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.prwm</em> file. Any <em>*</em> character in the URL will be automatically replaced by <em>le</em> or <em>be</em> depending on the platform endianness.<br />
 		[page:Function onLoad] — (optional) A function to be called after the loading is successfully completed. The function receives the loaded [page:BufferGeometry] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The function receives a XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/zh/loaders/SVGLoader.html b/docs/examples/zh/loaders/SVGLoader.html
index a589fc2971d0d4..1606c066ac09c4 100644
--- a/docs/examples/zh/loaders/SVGLoader.html
+++ b/docs/examples/zh/loaders/SVGLoader.html
@@ -97,7 +97,7 @@ <h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.svg</em> file.<br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives an array of [page:ShapePath] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains [page:Integer total] and [page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>
diff --git a/docs/examples/zh/loaders/TGALoader.html b/docs/examples/zh/loaders/TGALoader.html
index 2c0761f12a5e75..6b85cf1ad346a6 100644
--- a/docs/examples/zh/loaders/TGALoader.html
+++ b/docs/examples/zh/loaders/TGALoader.html
@@ -76,7 +76,7 @@ <h3>[method:DataTexture load]( [param:String url], [param:Function onLoad], [par
 		<p>
 		[page:String url] — A string containing the path/URL of the <em>.tga</em> file. <br />
 		[page:Function onLoad] — (optional) A function to be called after loading is successfully completed. The function receives loaded [page:DataTexture] as an argument.<br />
-		[page:Function onProgress] — (optional) A function to be called while the loading is in progress. The argument will be the XMLHttpRequest instance, which contains .[page:Integer total] and .[page:Integer loaded] bytes.<br />
+		[page:Function onProgress] (optional) — Will be called while load progresses. The first argument will be the ProgressEvent instance, which contains .[page:Boolean lengthComputable], .[page:Integer total] and .[page:Integer loaded]. If the server does not set the Content-Length header; .[page:Integer total] will be 0. The second argument will be the [link:https://developer.mozilla.org/en-US/docs/Web/API/Response/headers response headers].<br />
 		[page:Function onError] — (optional) A function to be called if an error occurs during loading. The function receives the error as an argument.<br />
 		</p>
 		<p>