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Asked: 2026-05-28T18:51:36+00:00

if i pass a plain string(i.e height or width) from one function A to

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if i pass a plain string(i.e height or width) from one function A to B to change a style of an element — 

<html>
<script type="text/javascript" >
function B(temp , attributeToChange , val ){
        temp.style.attributeToChange = val + "px"
}

function A(){

        var to = 200;
        B(this , "width" ,400 ) 
        B( this, "height" , to ) 
}

</script>
<style type="text/css">
    .in{
    width: 100px;
    height: 30px;
    }

</style>


<input class="in" type="button" value="Click Me" onclick="A.call(this)">
</html>

This was not possible as i’m not able to use the attributeToChange paramenter obtained as a string in B().Is there a way to achieve this (set the attribute of an elem from a string) or is a workaround to — use switch (attributeToChange)??

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1 Answer

  1. Editorial Team

    Try

    temp.style[attributeToChange] = val + "px"

    In javascript, a["x"] and a.x mean the same thing.

    enter image description here

    "The name of the song is called ‘Haddock’s Eyes’."

    "Oh, that’s the name of the song, is it?" Alice said, trying to feel interested.

    "No, you don’t understand," the Knight said, looking a little vexed. "That’s what the name is called. The name really is ‘The Aged Aged Man’."

    "Then I ought to have said ‘That’s what the song is called?’" Alice corrected herself.

    "No, you oughtn’t: that’s quite another thing! The song is called ‘Ways and Means’: but that’s only what it’s called, you know!"

    "Well, what is the song, then?" said Alice, who was by this time completely bewildered.

    "I was coming to that," the Knight said. "The song really is ‘A-sitting on a Gate’: and the tune’s my own invention."

    In javascript, we have someObject, it has an attribute called width and the name of this attribute is called attributeName. Then,

    someObject.width == someObject["width"] == someObject[attributeName]
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