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Editorial Team
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Asked: 2026-06-17T13:19:47+00:00

I am trying to change the color of this text to green using JavaScript,

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I am trying to change the color of this text to green using JavaScript, but I get a warning about it being a bad object and the script crashes.

<html>
<head>

<style>

b   {

    color: #0000FF;
}

</style>

<script>

function resizea()  {

  var a = document.getElementsByTagName("b");
  a.style.color = "#00FF00";
}

</script>

</head>
<body onload="resizea()">

<b>I am blue</b>

</body>
</html>
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1 Answer

  1. Editorial Team

    since getElementsByTagName("b") return a collection of elements, you need to get the first one:

    var a = document.getElementsByTagName("b")[0];

    Note the index between brackets [0]

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