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42 lines
1.5 KiB
42 lines
1.5 KiB
3 years ago
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// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])
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var anObject = require('./_an-object');
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var dPs = require('./_object-dps');
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var enumBugKeys = require('./_enum-bug-keys');
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var IE_PROTO = require('./_shared-key')('IE_PROTO');
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var Empty = function () { /* empty */ };
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var PROTOTYPE = 'prototype';
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// Create object with fake `null` prototype: use iframe Object with cleared prototype
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var createDict = function () {
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// Thrash, waste and sodomy: IE GC bug
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var iframe = require('./_dom-create')('iframe');
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var i = enumBugKeys.length;
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var lt = '<';
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var gt = '>';
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var iframeDocument;
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iframe.style.display = 'none';
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require('./_html').appendChild(iframe);
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iframe.src = 'javascript:'; // eslint-disable-line no-script-url
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// createDict = iframe.contentWindow.Object;
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// html.removeChild(iframe);
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iframeDocument = iframe.contentWindow.document;
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iframeDocument.open();
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iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);
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iframeDocument.close();
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createDict = iframeDocument.F;
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while (i--) delete createDict[PROTOTYPE][enumBugKeys[i]];
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return createDict();
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};
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module.exports = Object.create || function create(O, Properties) {
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var result;
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if (O !== null) {
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Empty[PROTOTYPE] = anObject(O);
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result = new Empty();
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Empty[PROTOTYPE] = null;
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// add "__proto__" for Object.getPrototypeOf polyfill
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result[IE_PROTO] = O;
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} else result = createDict();
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return Properties === undefined ? result : dPs(result, Properties);
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};
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