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I have this code

$(".area").on("keyup", function(){ this.style.height = "1px"; var buttons_matrix = (25 + this.scrollHeight) + "px"; var p = $( "#butons_matrix" ).css('top', buttons_matrix); });

How can I make it as soon as the class area is used once don't repeat it again the height, I can't use id here

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    Use .one() instead of .on() Commented Sep 13, 2018 at 8:18
  • As per @Mohammad's comment: api.jquery.com/one Commented Sep 13, 2018 at 8:19
  • You can use off() function of jQuery inside of the handler. e.g. $(".area").off("keyup") or $(this).off("keyup") when you need to disable only the element, not all classes. Commented Sep 13, 2018 at 8:24
  • .one() does not work Commented Sep 13, 2018 at 8:29
  • @lilo Check console for any error also write alert() in .one() to detecting your code is correct. Commented Sep 13, 2018 at 8:33
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