javascript jQuery：实时更新输入值

Question

提问by Stephen Way

This is what I've started out with and it only changes input#user_name upon running the script. How do I get it to live update the value?

这就是我开始的方式，它只在运行脚本时更改 input#user_name。我如何让它实时更新值？

var $username = $("input#user_email").val();

$("input#user_name").val($username);

Answer 1

$("input#user_email").keyup(function(){
  $("input#user_name").val($(this).val());
});

if what you mean is that when you type on user_email you want that on user_name

如果您的意思是当您在 user_email 上键入时，您希望在 user_name 上键入

Answer 2

$(function(){
  $('input#user_email').bind('keyup',function(){
     $("input#user_name").val($(this).val());
  });

});