mirror of https://github.com/webpack/webpack.git
48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
||
|
|
const RuntimeModule = require("../RuntimeModule");
|
||
|
|
const Template = require("../Template");
|
||
|
|
|
||
|
|
class GlobalRuntimeModule extends RuntimeModule {
|
||
|
|
constructor() {
|
||
|
|
super("global");
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @returns {string} runtime code
|
||
|
|
*/
|
||
|
|
generate() {
|
||
|
|
return Template.asString([
|
||
|
|
`${RuntimeGlobals.global} = (function() {`,
|
||
|
|
Template.indent([
|
||
|
|
// This works in non-strict mode
|
||
|
|
"var g = (function() { return this; })();",
|
||
|
|
"try {",
|
||
|
|
Template.indent(
|
||
|
|
// This works if eval is allowed (see CSP)
|
||
|
|
"g = g || new Function('return this')();"
|
||
|
|
),
|
||
|
|
"} catch (e) {",
|
||
|
|
Template.indent(
|
||
|
|
// This works if the window reference is available
|
||
|
|
"if (typeof window === 'object') g = window;"
|
||
|
|
),
|
||
|
|
"}",
|
||
|
|
// g can still be `undefined`, but nothing to do about it...
|
||
|
|
// We return `undefined`, instead of nothing here, so it's
|
||
|
|
// easier to handle this case:
|
||
|
|
// if (!global) { … }
|
||
|
|
"return g;"
|
||
|
|
]),
|
||
|
|
"})();"
|
||
|
|
]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = GlobalRuntimeModule;
|