difference between rem and em css
Explanation: If you run these code you understand differences between rem vs em
In this example, font-size of first h1 is 48px (nearest parent) and font-size
of second h1 is 32px ( parent of page which is html)
<style>
html {
font-size: 32px;
}
.font {
font-size: 48px;
}
.em {
font-size: 1em;
}
.rem {
font-size: 1rem;
}
</style>
<body>
<div class="font">
<h1 class="em">Hey guys!</h1>
</div>
<div class="font">
<h1 class="rem">Hey guys!</h1>
</div>
</body>