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Difference between px, em, and rem units example
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
<title>px vs em vs rem</title> | |
<style> | |
html { | |
font-size: 30px; | |
line-height: 1.6; | |
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; | |
} | |
#pixy { | |
font-size: 36px; | |
border-left: 30px solid hsl(60, 60%, 60%); | |
padding-left: 30px; | |
} | |
#pixy div { | |
font-size: 30px; | |
} | |
#pixy p:first-child { | |
font-size: 24px; | |
} | |
#pixy p:last-child { | |
font-size: 18px; | |
} | |
#pixy span { | |
font-size: 15px; | |
} | |
#emmy { | |
font-size: 1.2em; | |
/* 1.2 x 30px = 36px */ | |
border-left: 1.0em solid hsl(120, 60%, 60%); | |
padding-left: 1.0em; | |
} | |
#emmy div { | |
font-size: 1.0em; | |
/* 1 x 1.2 x 30px = 36px */ | |
} | |
#emmy p:first-child { | |
font-size: 0.8em; | |
/* 0.8 x 1 x 1.2 X 30px = 28.8px */ | |
} | |
#emmy p:last-child { | |
font-size: 0.6em; | |
/* 0.6 x 1.0 x 1.2 x 30px = px */ | |
} | |
#emmy span { | |
font-size: 0.5em; | |
/* 0.5 x 0.8 x 1.0 x 1.2 x 30px = px */ | |
} | |
#remmy { | |
font-size: 1.2rem; | |
/* 1.2 x 30px = 36px */ | |
border-left: 1.0rem solid hsl(180, 60%, 60%); | |
padding-left: 1.0rem; | |
} | |
#remmy div { | |
font-size: 1.0rem; | |
/* 1.0 x 30px = 30px */ | |
} | |
#remmy p:first-child { | |
font-size: 0.8rem; | |
/* 0.8 * 30px = 24px */ | |
} | |
#remmy p:last-child { | |
font-size: 0.6rem; | |
/* 0.6 x 30px = 18px */ | |
} | |
#remmy span { | |
font-size: 0.5rem; | |
/* 0.5 x 30px = 15px */ | |
} | |
div::first-line { | |
font-weight: 700; | |
} | |
@media all and (max-width: 800px) { | |
html { | |
font-size: 20px; | |
} | |
} | |
</style> | |
</head> | |
<body> | |
<section id="pixy"> | |
<div>PX: | |
<p>Lorem ipsum <span>dolor sit amet</span> consectetur adipisicing elit. Saepe voluptates, dicta voluptate | |
itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Saepe voluptates, dicta voluptate itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
</div> | |
</section> | |
<section id="remmy"> | |
<div>REM: | |
<p>Lorem ipsum <span>dolor sit amet</span> consectetur adipisicing elit. Saepe voluptates, dicta voluptate | |
itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Saepe voluptates, dicta voluptate itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
</div> | |
</section> | |
<section id="emmy"> | |
<div>EM: | |
<p>Lorem ipsum <span>dolor sit amet</span> consectetur adipisicing elit. Saepe voluptates, dicta voluptate | |
itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Saepe voluptates, dicta voluptate itaque culpa | |
non hic, at aspernatur perspiciatis exercitationem unde obcaecati ullam, iusto quam nihil. Non unde | |
fugiat deserunt?</p> | |
</div> | |
</section> | |
</body> | |
</html> |
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