Vijay Menon
ebe7d54efd
This fixes current breakage with Chrome 46. R=jmesserly@google.com Review URL: https://codereview.chromium.org/1235393004.
27 lines
862 B
JavaScript
27 lines
862 B
JavaScript
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Feature test for harmony support, alert if not present.
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(function () {
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try {
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var f = new Function(
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'"use strict";'+
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'class C {' +
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'constructor(x) { this.x = x; };' +
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'["foo"]() { return x => this.x + x; };' +
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'bar(args) { return this.foo()(...args); };' +
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'};' +
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'return new C(42).bar([100]);');
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if (f() == 142) return; // supported!
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} catch (e) {
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}
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var message = 'This script needs EcmaScript 6 features ' +
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'like `class` and `=>`. Please run in a browser with support, ' +
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'for example: chrome --js-flags="--harmony"';
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console.error(message);
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alert(message);
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})();
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