It's common knowledge that AJAX is often utilized to request a web part in HTML format from the server. However, is it feasible to use AJAX to request a script that includes functions?
It's common knowledge that AJAX is often utilized to request a web part in HTML format from the server. However, is it feasible to use AJAX to request a script that includes functions?
Check out this example demonstrating the use of eval() to achieve your goal:
var xhr;
if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else {
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
eval(xhr.responseText);
// You can now utilize any functions returned from the server.
}
}
xhr.open("GET", "your-server-page-url", true);
xhr.send();
Yes, it is possible to load a JavaScript file using AJAX requests.
http://api.jquery.com/jQuery.getScript/
$.getScript("ajax/test.js")
.done(function(script, textStatus) {
console.log( textStatus );
})
.fail(function(jqxhr, settings, exception) {
$( "div.log" ).text( "Triggered ajaxError handler." );
});
You can also achieve this by following the steps mentioned in (how to run JavaScript in HTML loaded via AJAX):
require("extra.js", function () {
functionDefinedInExtraJS();
});
//Sample require function:
function require(file, callback) {
var script = document.getElementsByTagName('script')[0],
newjs = document.createElement('script');
// For IE
newjs.onreadystatechange = function () {
if (newjs.readyState === 'loaded' || newjs.readyState === 'complete') {
callback();
}
};
// For other browsers
newjs.onload = function () {
callback();
};
newjs.src = file;
script.parentNode.insertBefore(newjs, script);
}
Another approach would be using the eval() function to convert a string response into executable JavaScript code.
Can AJAX be used to request a script with functions?
Absolutely, it is indeed possible. These functions can then be run on the client side. One useful method for making such requests is through jQuery's $.getScript function.
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