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: aecc847 GitHub-Pull-Request: golang#35805 Reviewed-on: https://go-review.googlesource.com/c/go/+/208600 Reviewed-by: Richard Musiol <[email protected]>
futurist · Mar 24, 2020 · 9ef61d5 · 9ef61d5
1 parent f0e8b81
commit 9ef61d5
Showing 1 changed file with 4 additions and 1 deletion.
diff --git 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 = () => {