File: rem-unit-root-element.html

package info (click to toggle)
thunderbird 1%3A143.0.1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 4,703,968 kB
  • sloc: cpp: 7,770,492; javascript: 5,943,842; ansic: 3,918,754; python: 1,418,263; xml: 653,354; asm: 474,045; java: 183,079; sh: 111,238; makefile: 20,410; perl: 14,359; objc: 13,059; yacc: 4,583; pascal: 3,405; lex: 1,720; ruby: 999; exp: 762; sql: 715; awk: 580; php: 436; lisp: 430; sed: 69; csh: 10
file content (26 lines) | stat: -rw-r--r-- 1,094 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
<!doctype html>
<title>CSS Values and Units Test: rem units on the root element</title>
<link rel="help" href="https://drafts.csswg.org/css-values/#rem">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  :root {
    font-size: 50px;
    margin-left: 2rem;
    padding-top: 2rem;
    line-height: 2rem;
  }
</style>
<script>
  let rootStyle = getComputedStyle(document.documentElement);
  test(() => assert_equals(rootStyle.marginLeft, "100px"), "rem based margin.");
  test(() => assert_equals(rootStyle.paddingTop, "100px"), "rem based padding.");
  test(() => assert_equals(rootStyle.lineHeight, "100px"), "rem based line-height.");

  test(() => {
    document.documentElement.style.fontSize = "initial";
    let initialFontSize = parseInt(getComputedStyle(document.documentElement).fontSize);
    document.documentElement.style.fontSize = "3rem";
    assert_equals(getComputedStyle(document.documentElement).fontSize, 3*initialFontSize + "px");
  }, "Check that rem font-size is based on the initial font-size.");
</script>