I have a js file that in which i want to include jquery. in order to include the jquery script i am using this clode:
var script = document.createElement('script');
script.src = 'https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js';
script.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(script);
this works, I can see that incuded the script correctly. My inspector shows that it loaded the script but jquery wont work.
any ideas?
You need to make sure the script you are dynamically loading is actually loaded before attempting to use it.
To do so, use script.onload to fire a callback once the load is completed.
var script = document.createElement('script');
script.src = 'https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js';
script.type = 'text/javascript';
document.getElementsByTagName('head') [0].appendChild(script);
script.onload = function () {
/* jquery dependent code here */
console.log($);
};
MDN has an example that's more adaptable to a callback you specify -
// from https://developer.mozilla.org/en-US/docs/Web/API/HTMLScriptElement#Dynamically_importing_scripts
function loadError (oError) {
throw new URIError("The script " + oError.target.src + " is not accessible.");
}
function importScript (sSrc, fOnload) {
var oScript = document.createElement("script");
oScript.type = "text\/javascript";
oScript.onerror = loadError;
if (fOnload) { oScript.onload = fOnload; }
document.currentScript.parentNode.insertBefore(oScript, document.currentScript);
oScript.src = sSrc;
}
Your jQuery code is not working may be caused by jQuery is not loaded yet while browser executing your jQuery code. Use function below to dynamically load jQuery with callback. Put your jQuery code inside a callback function.
function loadScript(url, callback) {
var s = document.createElement('script');
s.type = 'text/javascript';
s.src = url;
if (typeof(callback) === 'function') {
s.onload = s.onreadystatechange = function(event) {
event = event || window.event;
if (event.type === "load" || (/loaded|complete/.test(s.readyState))) {
s.onload = s.onreadystatechange = null;
callback();
}
};
}
document.body.appendChild(s);
}
/* Load up jQuery */
loadScript('https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js', function() {
// Put your jQuery code here.
});
You need to include jQuery inside the HTML code. jQuery won't work for you because your script is loaded before jQuery is loaded.
