jQuery - Detecting Enter Key

You can use the keyCode property of the event to detect which key was pressed. Enter Key is 13.

Press Enter Key and release it.

let txtDemoInput = $("#txtDemo");
txtDemoInput.keydown(function (event)
{
    if (event.keyCode === 13)
    {
        event.preventDefault();
        $("#demo1").text("Enter Key was pressed down.");
    }
});

txtDemoInput.keyup(function (event)
{
    if (event.keyCode === 13)
    {
        event.preventDefault();
        $("#demo1").text("Enter Key was released.");
    }
});