78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
|
/**
|
||
|
|
* @license Apache-2.0
|
||
|
|
*
|
||
|
|
* Copyright (c) 2018 The Stdlib Authors.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
// MODULES //
|
||
|
|
|
||
|
|
var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
|
||
|
|
var getThis = require( './codegen.js' );
|
||
|
|
var Self = require( './self.js' );
|
||
|
|
var Win = require( './window.js' );
|
||
|
|
var Global = require( './global.js' );
|
||
|
|
|
||
|
|
|
||
|
|
// MAIN //
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the global object.
|
||
|
|
*
|
||
|
|
* ## Notes
|
||
|
|
*
|
||
|
|
* - Using code generation is the **most** reliable way to resolve the global object; however, doing so is likely to violate content security policies (CSPs) in, e.g., Chrome Apps and elsewhere.
|
||
|
|
*
|
||
|
|
* @param {boolean} [codegen=false] - boolean indicating whether to use code generation to resolve the global object
|
||
|
|
* @throws {TypeError} must provide a boolean
|
||
|
|
* @throws {Error} unable to resolve global object
|
||
|
|
* @returns {Object} global object
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var g = getGlobal();
|
||
|
|
* // returns {...}
|
||
|
|
*/
|
||
|
|
function getGlobal( codegen ) {
|
||
|
|
if ( arguments.length ) {
|
||
|
|
if ( !isBoolean( codegen ) ) {
|
||
|
|
throw new TypeError( 'invalid argument. Must provide a boolean primitive. Value: `'+codegen+'`.' );
|
||
|
|
}
|
||
|
|
if ( codegen ) {
|
||
|
|
return getThis();
|
||
|
|
}
|
||
|
|
// Fall through...
|
||
|
|
}
|
||
|
|
// Case: browsers and web workers
|
||
|
|
if ( Self ) {
|
||
|
|
return Self;
|
||
|
|
}
|
||
|
|
// Case: browsers
|
||
|
|
if ( Win ) {
|
||
|
|
return Win;
|
||
|
|
}
|
||
|
|
// Case: Node.js
|
||
|
|
if ( Global ) {
|
||
|
|
return Global;
|
||
|
|
}
|
||
|
|
// Case: unknown
|
||
|
|
throw new Error( 'unexpected error. Unable to resolve global object.' );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// EXPORTS //
|
||
|
|
|
||
|
|
module.exports = getGlobal;
|