From 3e35a02586ede1cd31737edf2efcfaeff59b63d0 Mon Sep 17 00:00:00 2001
From: Hayato Ito <hayato@chromium.org>
Date: Tue, 12 Oct 2021 00:40:20 -0700
Subject: [PATCH] Introduce <script type=webbundle>

Introduce <script>-based API for subresource loading with Web Bundles.

See the design doc [1] for the motivation of switching from
<link>-based API to <script>-based API. The explainer [2] was already
updated to use <script>-based API.

This feature is guarded by `SubresourceWebBundles` flag.

We eventually drop the <link rel=webbundle> support and remove the
<link>-based API code once we can confirm <script>-based API can be
used as a replacement of <link>-based API.

This CL should be considered as the first step to switch to
<script>-based API. There are still gaps between <link>-based API and
<script>-based API, which will be addressed later [3].

This CL intentionally adds a very minimum test for <script>-based API
because there are already WPT tests for <script type=webbundle>. They
all have been marked as [ SKIP ] in TestExpectations until now. Now
some of them are passing after this CL.

We'll make the remaining tests pass in follow-up CLs, and also add
tests which are specific to <script>-based API as necessary. These
efforts should be tracked by crbug.com/1245166.

[1]: https://docs.google.com/document/d/1q_SodTcLuwya4cXt1gIRaVrkiaBfwWyPvkY1fqRKkgM/edit?usp=sharing&resourcekey=0-dqrFOGVCYsg8WRZ4RFgwuw
[2]: https://github.com/WICG/webpackage/blob/main/explainers/subresource-loading.md
[3]: https://github.com/WICG/webpackage/issues/670

Bug: 1245166
Change-Id: I5109b6e692baf10fd1d8a31a31d93176d4dc4ad2
---
 ...script-supports-webbundle.https.tentative.html | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 web-bundle/subresource-loading/script-supports-webbundle.https.tentative.html
diff --git a/web-bundle/subresource-loading/script-supports-webbundle.https.tentative.html b/web-bundle/subresource-loading/script-supports-webbundle.https.tentative.html
new file mode 100644
index 00000000000000..f0aabf5d565331
--- /dev/null
+++ b/web-bundle/subresource-loading/script-supports-webbundle.https.tentative.html
@@ -0,0 +1,15 @@
+<DOCTYPE html>
+<html>
+<title>HTMLScriptElement.supports webbundle</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(() => {
+  assert_true(HTMLScriptElement.supports('webbundle'));
+}, 'HTMLScriptElement.supports returns true for \'webbundle\'');
+
+test(() => {
+  assert_false(HTMLScriptElement.supports(' webbundle'));
+  assert_false(HTMLScriptElement.supports('webbundle '));
+}, 'HTMLScriptElement.supports returns false for unsupported types');
+</script>
