52 lines
1.3 KiB
JavaScript
52 lines
1.3 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 evil = require( '@stdlib/utils/eval' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Tests for native `Proxy` support.
|
|
*
|
|
* @returns {boolean} boolean indicating if an environment has native `Proxy` support
|
|
*
|
|
* @example
|
|
* var bool = hasProxySupport();
|
|
* // returns <boolean>
|
|
*/
|
|
function hasProxySupport() {
|
|
var bool;
|
|
try {
|
|
evil( '"use strict"; var handler = { "get": function get( t, n ) { return t[ n ] * 100; } }; var target = { "beep": 3.14 }; var p = new Proxy( target, handler ); var x = p.beep; if ( x !== 314 ) { throw new Error( "native Proxy is not supported." ); }' );
|
|
bool = true;
|
|
} catch ( err ) { // eslint-disable-line no-unused-vars
|
|
bool = false;
|
|
}
|
|
return bool;
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = hasProxySupport;
|