keyListener“ Enter”不起作用

Question

function checkId() {
  var password = document.getElementById("passwordBox").value;

  if (password == "superx") {
    return true;
  };

  alert("Not Allowed :(");

  return false;
};

function keyAdd() {
  passwordBox.addEventListener("keypress", function(event) {
    if (event.keyCode == 13) {
      checkId();
    }
  })
};

What's the problem in the second function?

Answer 1

1) https://www.w3schools.com/Jsref/event_onkeypress.asp said : " Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions. " try : " object.onkeypress = function(){myScript}; " instead...

2)maybe you don't call "keyAdd()" at all...

Answer 2

You can try it

 <script> function checkId() { var password = document.getElementById("passwordBox").value; if (password == "superx") { return true; } alert("Not Allowed :("); return false; }; function keyAdd() { passwordBox.addEventListener("keypress", function(event) { if(event.keyCode == 13){ checkId(); } }) }; </script> 

  <input type="password" name="passwordBox" id="passwordBox" onkeypress="return keyAdd(event)"/>