on input enter javascript event code example

Example 1: javascript enter event listener

document.querySelector('#txtSearch').addEventListener('keypress', function (e) {
    if (e.key === 'Enter') {
      // code for enter
    }
});

Example 2: javascript detect enter press on input

var el = document.getElementById("myInputID");
el.addEventListener("keyup", function(event) {
    if (event.key === "Enter") {
        // Enter key was hit
    }
});