number validation in jquery

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Erik
16 Jul 2020
1// Restricts input for the set of matched elements to the given inputFilter function.
2(function($) {
3  $.fn.inputFilter = function(inputFilter) {
4    return this.on("input keydown keyup mousedown mouseup select contextmenu drop", function() {
5      if (inputFilter(this.value)) {
6        this.oldValue = this.value;
7        this.oldSelectionStart = this.selectionStart;
8        this.oldSelectionEnd = this.selectionEnd;
9      } else if (this.hasOwnProperty("oldValue")) {
10        this.value = this.oldValue;
11        this.setSelectionRange(this.oldSelectionStart, this.oldSelectionEnd);
12      } else {
13        this.value = "";
14      }
15    });
16  };
17}(jQuery));
18
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