From cbb0389616297cb576d21dad226400a8912e014b Mon Sep 17 00:00:00 2001
From: Arsene Rei <arsenerei@users.noreply.github.com>
Date: Sun, 29 Jan 2017 21:19:54 -0800
Subject: [PATCH] Replace `export let` with `export var`

When running through the `(require ... :reload)` example, I got an error message from Node:

SyntaxError: Identifier 'sayHello$$module$src$js$hello' has already been declared
    at /home/rei/repos/hello-es6/.cljs_node_repl/src/js/hello.js:1:1
    at ContextifyScript.Script.runInThisContext (vm.js:26:33)
    at Object.exports.runInThisContext (vm.js:79:17)
    at nodeGlobalRequire (repl:85:6)
    at global.CLOSURE_IMPORT_SCRIPT (repl:75:3)
    at Object.goog.require (repl:21:8)
    at repl:1:6
    at ContextifyScript.Script.runInThisContext (vm.js:26:33)
    at Object.exports.runInThisContext (vm.js:79:17)
    at Domain.<anonymous> ([stdin]:50:34)

This was due to the fact that Node (my version is 7.4.0) disallows redefinining anything declared with a `let`.  Cf: https://github.com/nodejs/node/issues/6118

This commit replace any `export let` with an `export var` which can be refined without error.
---
 content/guides/javascript-modules.adoc | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/content/guides/javascript-modules.adoc b/content/guides/javascript-modules.adoc
index 73a51946..50a61b53 100644
--- a/content/guides/javascript-modules.adoc
+++ b/content/guides/javascript-modules.adoc
@@ -142,7 +142,7 @@ Edit this file to look like the following:
 
 [source,javascript]
 ----
-export let sayHello = function() {
+export var sayHello = function() {
     console.log("Hello, world!");
 };
 ----
@@ -206,10 +206,10 @@ Without quitting your REPL, edit `src/js/hello.js` to the following:
 
 [source,javascript]
 ----
-export let sayHello = function() {
+export var sayHello = function() {
     console.log("Hello, world!");
 };
-export let sayThings = function(xs) {
+export var sayThings = function(xs) {
     for(let x of xs) {
         console.log(x);
     }
@@ -298,15 +298,15 @@ Let's add a React JSX component to `src/js/hello.js`:
 
 [source,javascript]
 ----
-export let sayHello = function() {
+export var sayHello = function() {
     console.log("Hello, world!");
 };
-export let sayThings = function(xs) {
+export var sayThings = function(xs) {
     for(let x of xs) {
         console.log(x);
     }
 };
-export let reactHello = function() {
+export var reactHello = function() {
     return <div>Hello world!</div>
 };
 ----