How to use Javascript to get data from a WordPress form

This approach should work,

Modify it for your use case.

//JQuery Code
jQuery( document ).on( 'change', '.from-this', function( e ) {
    e.preventDefault();
    jQuery( '.change-this' ).text( this.value );
} )

HTML Code:

<input type="search" class="from-this" />
<div class="change-this"></div>

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)