find that you press enter on input from JQ code example

Example 1: jquery on enter key pressed

//jQuery detect user pressing enter
$(document).on('keypress',function(e) {
    if(e.which == 13) {
        alert('User pressed Enter!');
    }
});

Example 2: how to send enter event to input field jquery

var e = jQuery.Event("keydown");
e.which = 13; //choose the one you want
e.keyCode = 13;
$("#theInputToTest").trigger(e);