What are the reasons behind the ineffectiveness of !important in CSS?

I am looking to increase the font-size of all text on my website to 200%, you can find some test code in this Fiddle link.

If it is a PX issue, why does the code work when I add the style to "<h2>"?

<div>
<h2 class="test" style="font-size:300% !important">
hello
</h2>
<h2 class="test2">
hello
</h2>
<h2 class="test3">
hello
</h2>

Alternatively, how can I uniformly enlarge all font-sizes by the same rate?

Answer №1

Utilize em and rem units for font sizing.

For a convenient conversion tool, visit

HTML Example:

<div style="font-size:2rem !important" >
    <h2 class="test">
    greeting
    </h2>
    <h2 class="test2">
    greeting
    </h2>
    <h2 class="test3">
    greeting
    </h2>
</div>

CSS Styling:

.test{
  font-size:1em;
}
.test2{
  font-size:2em;
}
.test3{
  font-size:3em;
}

View the live demo here: https://jsfiddle.net/eom40w0L/8/

Answer №3

.style1{
  font-size:10px;
}
.style2{
  font-size:20px;
}
.style3{
  font-size:30px;
}

div h2{
  zoom:300%!important;
}
<div class="content">


<h2 class="style1">
hello
</h2>
<h2 class="style2">
hello
</h2>
<h2 class="style3">
hello</h2>

</div>

you can adjust the Zoom property like this

.style1{
  font-size:10px;
}
.style2{
  font-size:20px;
}
.style3{
  font-size:30px;
}

.content{
  zoom:300%!important;
}
<div class="data">


<h2 class="style1">
hello
</h2>
<h2 class="style2">
hello
</h2>
<h2 class="style3">
hello</h2>

</div>

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