Last change
on this file since 84d0fbb was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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Property mode
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100644
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File size:
823 bytes
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[6a3a178] | 1 | 'use strict';
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| 2 |
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| 3 | var slice = Array.prototype.slice;
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| 4 | var isArgs = require('./isArguments');
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| 5 |
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| 6 | var origKeys = Object.keys;
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| 7 | var keysShim = origKeys ? function keys(o) { return origKeys(o); } : require('./implementation');
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| 8 |
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| 9 | var originalKeys = Object.keys;
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| 10 |
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| 11 | keysShim.shim = function shimObjectKeys() {
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| 12 | if (Object.keys) {
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| 13 | var keysWorksWithArguments = (function () {
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| 14 | // Safari 5.0 bug
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| 15 | var args = Object.keys(arguments);
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| 16 | return args && args.length === arguments.length;
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| 17 | }(1, 2));
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| 18 | if (!keysWorksWithArguments) {
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| 19 | Object.keys = function keys(object) { // eslint-disable-line func-name-matching
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| 20 | if (isArgs(object)) {
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| 21 | return originalKeys(slice.call(object));
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| 22 | }
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| 23 | return originalKeys(object);
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| 24 | };
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| 25 | }
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| 26 | } else {
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| 27 | Object.keys = keysShim;
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| 28 | }
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| 29 | return Object.keys || keysShim;
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| 30 | };
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| 31 |
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| 32 | module.exports = keysShim;
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