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JavaScript Textbox's color doesbt change

Samantha Groves

Samantha Groves

Coder
Hello!I have this code:

HTML: 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>IP Address Info</title>


</head>
<body>

<script>



</script>

<label style="background-color:whitesmoke;color: black;position:fixed;top:20px;left:20px;width:100px;height:20px; font-family:Verdana">IP Address



</label>
<label style="background-color:whitesmoke;color: black;position:fixed;top:20px;left:340px;width:200px;height:20px; font-family:Verdana">Subnet mask



</label>

<input type="text" id="ipAddressId" style="background-color:whitesmoke;color:gray;position:fixed;border-color:whitesmoke;top:120px;left:20px;font-family:Verdana;width:200px;height:20px; border-radius:8px" onfocus="function f(){this.HTMLElement().setAttribute('color','black')}">








</body>
</html>

I would like the text of my textbox to change color when it is on focus(or selected) but it doesnt change and I dont know where I am wrong.Any help?
 
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Hey there, the CSS :focus pseudo-class is what you should be using, but it will have to be in an internal or external stylesheet for it to work, not inline.

Since you will have to use an internal or external stylesheet anyway, you may as well just write all of you CSS internally or externally for the sake of readability.

Here's a re-written version of your code, but with an internal stylesheet and the :focus pseudo-class:
HTML: 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>IP Address Info</title>
    <style>
      #ipAddressLabel {
        background-color: whitesmoke;
        color: black;
        position: fixed;
        top: 20px;
        left: 20px;
        width: 100px;
        height: 20px;
        font-family: Verdana;
      }

      #subnetMaskLabel {
        background-color: whitesmoke;
        color: black;
        position: fixed;
        top: 20px;
        left: 340px;
        width: 200px;
        height: 20px;
        font-family: Verdana;
      }

      #ipAddressId {
        background-color: whitesmoke;
        color: gray;
        position: fixed;
        border-color: whitesmoke;
        top: 120px;
        left: 20px;
        font-family: Verdana;
        width: 200px;
        height: 20px;
        border-radius: 8px;
      }

      /* Use :focus pseudo-class for focus state */
      #ipAddressId:focus {
        color: black;
      }
    </style>
  </head>
  <body>
    <label id="ipAddressLabel">IP Address</label>
    <label id="subnetMaskLabel">Subnet mask</label>
    <input type="text" id="ipAddressId">
  </body>
</html>

Now, if you were to use JavaScript for the focus state, this is what you should be doing:
HTML: 
<input onfocus="this.style.color = 'black'"> <!-- other attributes have been removed for this example -->
Keep in mind that the colour will stay the same when the element loses focus, so you will have to add an onblur listener if you want to change the colour back to default.
 
Last edited:
Upvote 0 Downvote
I don't know if I'm being rude for making another person's code more compact unprompted...
HTML: 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>IP Address Info</title>
    <style>
      #ipAddressLabel,
      #subnetMaskLabel,
      #ipAddressId {
        background-color: whitesmoke;
        color: black;
        position: fixed;
        top: 20px;
        left: 20px;
        width: 100px;
        height: 20px;
        font-family: Verdana;
      }

      #subnetMaskLabel {
        left: 340px;
        width: 200px;
      }

      #ipAddressId {
        color: gray;
        border-color: whitesmoke;
        top: 120px;
        width: 200px;
        border-radius: 8px;
      }

      #ipAddressId:focus {
        color: black;
      }
    </style>
  </head>
  <body>
    <label id="ipAddressLabel">IP Address</label>
    <label id="subnetMaskLabel">Subnet mask</label>
    <input type="text" id="ipAddressId">
  </body>
</html>
Also, onfocus="this.style.color = 'black';" makes the field use the text black even after unfocusing.
In my opinion, the only code worth is onfocus="this.select();", although I'm afraid of using this and only use event.target.
 
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