JAVASCRIPT

click button when press enter javascript

var input = document.getElementById("myInput");

// Execute a function when the user releases a key on the keyboard
input.addEventListener("keyup", function(event) {
  // Number 13 is the "Enter" key on the keyboard
  if (event.keyCode === 13) {
    // Cancel the default action, if needed
    event.preventDefault();
    // Trigger the button element with a click
    document.getElementById("myBtn").click();
  }
});

on enter press button

<input onkeyup="if(event.keyCode===13){submit.click()}"><button id="submit">submit</button>

button onclick enter key

$("#id_of_textbox").keyup(function(event) {
    if (event.keyCode === 13) {
        $("#id_of_button").click();
    }
});