Example of a javascript callback.
A Pen by Ken Shoufer on CodePen.
Created
October 3, 2014 15:05
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A Pen by Ken Shoufer.
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| <h2>Tweet Box</h2> | |
| <textarea name="" id="tweet-box" cols="40" rows="6"></textarea> | |
| <p>Characters Remaining: <span id="tweet-feedback"></span></p> |
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| var tweetMax = 140; | |
| var tweetValue; | |
| var tweetRemaining; | |
| $('#tweet-box').keyup(function() { | |
| tweetValue = $('#tweet-box').val().length; | |
| tweetRemaining = tweetMax - tweetValue; | |
| if (tweetRemaining < 0) { | |
| $('#tweet-feedback').addClass("overLimit"); | |
| } else { | |
| $('#tweet-feedback').removeClass("overLimit"); | |
| } | |
| $('#tweet-feedback').html(tweetRemaining); | |
| }); |
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| #tweet-feedback { | |
| color: #333; | |
| background-color: #EFD994; | |
| padding: 10px; | |
| text-align: center; | |
| } | |
| #tweet-feedback.overLimit { | |
| color: #fff; | |
| background-color: #EE3370; | |
| } |
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