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