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2 years ago
/*
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([
"if (typeof globalThis === 'object') return globalThis;",
"try {",
Template.indent(
// This works in non-strict mode
// or
// This works if eval is allowed (see CSP)
"return this || new Function('return this')();"
),
"} catch (e) {",
Template.indent(
// This works if the window reference is available
"if (typeof window === 'object') return window;"
),
"}"
// It 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) { … }
]),
"})();"
]);
}
}
module.exports = GlobalRuntimeModule;