From: nao20010128nao <nao20010128@gmail.com>
Date: Sat, 21 Mar 2020 06:52:58 +0000 (+0000)
Subject: syscall/js: make wasm_exec.js compatible with Webpack
X-Git-Tag: go1.15beta1~778
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9ef61d58c015e7bc297ed4404e34af5f3d514257;p=gostls13.git

syscall/js: make wasm_exec.js compatible with Webpack

In Webpack, require("fs") will always be empty. This behavior throws an error: "fs.writeSync is not function". It happens when you did "fmt.Println".
This PR avoids such problem and use polyfill in wasm_exec.js on Webpack.

Change-Id: I55f2c75ce86b7f84d2d92e8e217b5decfbe3c8a1
GitHub-Last-Rev: aecc847e3f9d5617ea4b00196ef2810c2458f085
GitHub-Pull-Request: golang/go#35805
Reviewed-on: https://go-review.googlesource.com/c/go/+/208600
Reviewed-by: Richard Musiol <neelance@gmail.com>
---

diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index 8cb297f379..a99aaeda07 100644
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -27,7 +27,10 @@
 	}
 
 	if (!global.fs && global.require) {
-		global.fs = require("fs");
+		const fs = require("fs");
+		if (Object.keys(fs) !== 0) {
+			global.fs = fs;
+		}
 	}
 
 	const enosys = () => {