test to see if jquery is working code example
Example 1: check if jquery is installed
if (typeof jQuery == "undefined") {
alert("JQuery is not installed");
} else {
alert("JQuery is installed correctly!");
}
Example 2: how to check if jquery is loaded
window.onload = function() {
if (window.jQuery) {
// jQuery is loaded
alert("Yeah!");
} else {
// jQuery is not loaded
alert("Doesn't Work");
}
}