10 examples of 'document loaded javascript' in JavaScript

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export function loadScript(url, callback) {
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    if (isNodeEnv()) {
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        return
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    }
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    var head = document.getElementsByTagName('head')[0];
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    var script = document.createElement('script');
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    script.type = 'text/javascript';
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    script.src = url;
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    //借鉴了jQuery的script跨域方法
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    script.onload = script.onreadystatechange = function(){
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        if((!this.readyState||this.readyState === 'loaded'||this.readyState === 'complete')){
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            callback && callback();
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            // Handle memory leak in IE
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            script.onload = script.onreadystatechange = null;
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        }
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    };
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    head.appendChild(script);
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}

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function loadScript(url, callback)
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{
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    // Adding the script tag to the head as suggested before
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    var head = document.getElementsByTagName('head')[0];
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    var script = document.createElement('script');
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    script.type = 'text/javascript';
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    script.src = url;
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    // Then bind the event to the callback function.
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    // There are several events for cross browser compatibility.
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    script.onreadystatechange = callback;
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    script.onload = callback;
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    // Fire the loading
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    head.appendChild(script);
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}

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function loadScript(url, callback)
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{
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	var script = document.createElement("script")
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	script.type = "text/javascript";
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	if (script.readyState)
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	{ // IE
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		script.onreadystatechange = function()
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		{
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			if (script.readyState == "loaded" || script.readyState == "complete")
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			{
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				script.onreadystatechange = null;
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				callback();
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			}
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		};
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	} else
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	{ // Others
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		script.onload = function()
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		{
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			callback();
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		};
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	}
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	script.src = url;
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	document.getElementsByTagName("head")[0].appendChild(script);
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}

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export function documentReady(cb) {
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  if (stateIsInteractive() || stateIsComplete()) {
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    cb();
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  }
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  function loadedHandler() {
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    removeHandler(doc, 'DOMContentLoaded', loadedHandler);
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    cb();
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  }
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  addHandler(doc, 'DOMContentLoaded', loadedHandler);
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}

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function scriptContentLoaded(scriptContent) {
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    jsParser({
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        input: scriptContent,
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        eventSource: eventSource,
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        eventPrefix: 'js:',
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        state: {
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            scriptUrl: event.src
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        }
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    }, jsTransformDone);
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    function jsTransformDone(error, newScriptContent) {
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        event.content = newScriptContent;
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        event.changed = newScriptContent !== scriptContent;
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        done(error, event);
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    }
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}

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private async _addJsScripts(): Promise {
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    await Promise.all([
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        this._page.evaluateHandle(WendigoUtilsLoader),
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        this._page.evaluateHandle(SelectorQueryLoader),
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        this._page.evaluateHandle(SelectorFinderLoader)
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    ]);
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}

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export default function loadScript(url: string, callback: LoadScriptCallback) {
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  const script = document.createElement('script');
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  script.async = true;
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  script.src = url;
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  script.onerror = event => {
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    callback(false);
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  };
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  script.onload = () => {
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    callback(true);
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  };
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  // $FlowFixMe
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  document.head.appendChild(script);
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}

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function load(script, callback) {
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    if (script.state == LOADED) {
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        return callback && callback();
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    }
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    if (script.state == LOADING) {
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        return api.ready(script.name, callback);
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    }
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    if (script.state == PRELOADING) {
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        return script.onpreload.push(function() {
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            load(script, callback);
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        });
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    }
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    script.state = LOADING;
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    scriptTag(script.url, function() {
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        script.state = LOADED;
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        if (callback) { callback(); }
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        // handlers for this script
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        each(handlers[script.name], function(fn) {
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            one(fn);
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        });
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        // everything ready
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        if (allLoaded() && isDomReady) {
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            each(handlers.ALL, function(fn) {
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                one(fn);
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            });
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        }
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    });
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}

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function iframeOnload() {
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	// 移除提交数据用的表单和iframe
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	if (div.parentNode) { div.parentNode.removeChild(div); }
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	// 释放全局回调函数
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	if (callbackName) { base.deleteGlobalVar(callbackName); }
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	onload('success');
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}

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function inject_script(script_name){
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	var s = document.createElement('script');
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	s.src = chrome.extension.getURL(script_name);
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	(document.head||document.documentElement).appendChild(s);
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	//s.onload = function() {
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	//    s.parentNode.removeChild(s);
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	//};
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}