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24 lines
753 B
24 lines
753 B
4 years ago
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'use strict';
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exports.test = function () {
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return 'document' in global && 'onreadystatechange' in global.document.createElement('script');
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};
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exports.install = function (handle) {
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return function () {
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// Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted
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// into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.
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var scriptEl = global.document.createElement('script');
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scriptEl.onreadystatechange = function () {
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handle();
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scriptEl.onreadystatechange = null;
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scriptEl.parentNode.removeChild(scriptEl);
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scriptEl = null;
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};
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global.document.documentElement.appendChild(scriptEl);
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return handle;
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};
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};
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