How to change the font-size uniformly?

Tags: javascript,jquery,html,css

Problem :

If I have the following HTML:

<div class="div1">
   <div class="div2">
   <div class="div3">

div2 and div3 have their own CSS with font-sizes etc. defined. Is there a way I can reduce the font-size of div1 uniformly? That is, take the font size defined in div2 and div3 and reduce them by say 2px? This is similar to how you do Select All -> Ctrl + Shift + < to reduce the size of the selected text by 1 point in word processing software. Any suggestions?

Solution :

I think that this is what you want:



<div class="div1">
   <div class="div2">
       Some text, and more, and more, and more, and more, and more, and more, and more, and more.
   <div class="div3">
       Some text, and more, and more, and more, and more, and more, and more, and more, and more.
    <button class="increaseFontSize">Increase Font Size</button>


        var fontSize = getFontSize($(".div3"));
        var newFontSize = fontSize + 2;
        $(".div3").css("font-size", newFontSize);
        return false;
function getFontSize(element) {
    var currentSize = $(element).css("font-size");
    var currentSizeNumber = parseFloat(currentSize);
    return currentSizeNumber;

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