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55 lines
No EOL
1.8 KiB
HTML
55 lines
No EOL
1.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en"><head><meta charset="utf-8">
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<title>Selectors Level 4: focus-within</title>
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<link href="mailto:kli79@bloomberg.net" rel="author" title="Keyong Li">
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<link href="mailto:florian@rivoal.net" rel="author" title="Florian Rivoal">
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<link href="https://drafts.csswg.org/selectors-4/#focus-within-pseudo" rel="help">
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<link href="reference/focus-within-001-ref.htm" rel="match">
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<meta content="interact" name="flags">
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<meta content="Test that :focus-within works on form controls, using an input element." name="assert">
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<style>
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/* Suppress things that cannot be reproduced in the reference file */
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:focus {
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all: initial;
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outline: none;
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/* Make the caret invisible
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since it matches the color of the text, which is transparent,
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while keeping the text readable thanks to its shadow.
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Not using the caret-color property as it is too new to be relied on. */
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color: transparent; text-shadow: black 0px 0px 0px;
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}
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/* Use blue to indicate that the user needs to pay attention.
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This element needs to be focused for the test to make sense. */
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#focusme:not(:focus) {
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border: solid 15px blue;
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}
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#focusme:focus:not(:focus-within) {
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background: red;
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}
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div:focus-within {
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border: solid 5px green;
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}
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</style>
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</head><body><p>Test passes if, when the element below is focused,
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it is surrounded by a thick green border.
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There must be no red or blue once it is focused.</p>
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<div>
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<div>
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<div>
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<input onfocus="this.classList.toggle('reftest-wait');" class="reftest-wait" value="Focus this element" id="focusme">
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<div>
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</div>
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</div>
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<script>
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/* This script is an optional convenience,
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simply removing the need to manually focus the element.
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The test is valid even if the script is not run. */
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var editor = document.getElementById('focusme');
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editor.focus();
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</script>
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</div></div></body></html> |