jQuery check if input text contains specific text

问题

If input text field contains "@twitter.com", would like to append text to div.

Currently have the following but only works when test=151516058@twitter.com, any suggestions?

var test = jQuery('input[name$="user_email"]').val(); 
  if(test == "@twitter.com"){
     jQuery(".iump-clear").append('<div>Please update your email address</div>');
  }

<input type="text" name="user_email" value="151516058@twitter.com">
<div class="iump-clear"></div>

回答1:

You should check if @twitter.com is contained in input, you can use .indexOf() for that

var test = jQuery('input[name$="user_email"]').val(); 
  if(test.indexOf("@twitter.com")>-1){
     jQuery(".iump-clear").append('<div>Please update your email address</div>');
  }

<input type="text" name="user_email" value="151516058@twitter.com">
<div class="iump-clear"></div>

来源：https://stackoverflow.com/questions/36455128/jquery-check-if-input-text-contains-specific-text