33 lines
823 B
JavaScript
33 lines
823 B
JavaScript
'use strict';
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var slice = Array.prototype.slice;
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var isArgs = require('./isArguments');
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var origKeys = Object.keys;
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var keysShim = origKeys ? function keys(o) { return origKeys(o); } : require('./implementation');
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var originalKeys = Object.keys;
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keysShim.shim = function shimObjectKeys() {
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if (Object.keys) {
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var keysWorksWithArguments = (function () {
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// Safari 5.0 bug
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var args = Object.keys(arguments);
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return args && args.length === arguments.length;
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}(1, 2));
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if (!keysWorksWithArguments) {
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Object.keys = function keys(object) { // eslint-disable-line func-name-matching
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if (isArgs(object)) {
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return originalKeys(slice.call(object));
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}
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return originalKeys(object);
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};
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}
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} else {
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Object.keys = keysShim;
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}
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return Object.keys || keysShim;
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};
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module.exports = keysShim;
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