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Editorial Team
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Asked: 2026-05-23T09:40:09+00:00

In this code: <!doctype html> <body> <input id=a/> <input id=b/> <script> var a=document.getElementById(a); var

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In this code:

<!doctype html>
<body>
<input id="a"/>
<input id="b"/>
<script>
var a=document.getElementById("a");
var b=document.getElementById("b");
a.addEventListener("cut",function(e){
    b.value=a.value;
    //the line above is not working as expected!
    //neither does this (as per tjm's answer): b.value=a.value.substr(0,a.selectionStart);
},true);

</script>
</body>

When I do a cut in text-box-a, I want text-box-b to have the same value as text-box-a.. but it’s not working. does anyone have any solution to this problem?

I need the solution to work in IE9.

(3 answers so far though none of them worked.. i can’t believe we can’t do this in javascript.. this is like one of the less-common-but-still-common stuff that we need ain’t it?)

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1 Answer

  1. Editorial Team

    I think this works as you want it to.

    <script>
var a = document.getElementById("a");
var b = document.getElementById("b");

a.addEventListener("cut", function(e) {

    var s = a.value;
    b.value = s.substr(0,a.selectionStart) + s.substr(a.selectionEnd);

}, false);

</script>
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