jquery TextArea input character word count hint

Effect:

HTML code:

<textareaID= "Assayinfo"name= "Assayinfo"rows= "3"cols= " the"maxlength= "+"placeholder= "Hint: Please enter the relevant information such as check results, up to 30 characters"></textarea><spanID= "WordCount">30</span>/30

jquery Code:

$ (document). Ready (function() {        var// Gets the string length of the text field        $ ("# WordCount "). Text (- counter);        $ (document). KeyUp (function() {            var text = $ ("#assayInfo"). Val ();             var counter = text.length;            $ ("#wordCount"). Text (30-counter);    // subtract character length each time         });    });

jquery TextArea input character word count hint