How to use jQuery in wordpress

Anybody in?

try jQuery(document).ready… instead of $(document)

I have done that,but it didn’t work.

take a look here so you can see how to properly load jquery.
https://digwp.com/2009/06/including-jquery-in-wordpress-the-right-way/

and yes, youre going to need to replace $ with jQuery also.

You will have to (register and) enqueue the script: https://codex.www.ads-software.com/Function_Reference/wp_enqueue_script. See also admin_enqueue_scripts

The problem is that when i put thes codes :

$(document).ready(function(){
alert(“ddd”);
});
</script>

in header.php, it can work ,but when i put those codes in the file of my plugin, it can’t work.

Thanks to all of you,Good Luck!