145 lines
5.7 KiB
HTML
145 lines
5.7 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.csswg.org/css-ui-4/#field-sizing">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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textarea {
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font-family: monospace;
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}
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.disable-default {
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field-sizing: content;
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}
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.small-placeholder {
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font-size: 32px;
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}
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.small-placeholder::placeholder {
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font-size: 16px;
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}
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.large-placeholder {
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font-size: 20px;
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}
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.large-placeholder::placeholder {
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font-size: 40px;
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}
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</style>
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<body>
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<div id="container"></div>
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<script>
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const DISABLE = 'class="disable-default"';
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const LONG_TEXT = 'The quick brown fox jumps over the lazy dog.';
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function addElements(source) {
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const container = document.querySelector('#container');
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container.innerHTML = source + source;
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container.lastElementChild.classList.add('disable-default');
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return {
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fixed: container.firstElementChild,
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content: container.lastElementChild
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};
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}
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function addTwoElements(source1, source2) {
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const container = document.querySelector('#container');
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container.innerHTML = source1 + source2;
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return {
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e1: container.firstElementChild,
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e2: container.lastElementChild
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};
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}
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test(() => {
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let pair = addElements('<textarea></textarea>');
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// Historically a <textarea> has approximately 20ch x 2lh size by default.
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// A <textarea> with field-sizing:content must be samller than the default.
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assert_less_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_less_than(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addTwoElements(`<textarea ${DISABLE}></textarea>`, `<textarea ${DISABLE}>foo</textarea>`);
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assert_less_than(pair.e1.offsetWidth, pair.e2.offsetWidth);
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assert_equals(pair.e1.offsetHeight, pair.e2.offsetHeight);
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}, 'Empty value');
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test(() => {
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let pair = addElements('<textarea cols="10" rows="3"></textarea>');
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assert_less_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_less_than(pair.content.offsetHeight, pair.fixed.offsetHeight);
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}, 'Empty value with cols/rows');
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test(() => {
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let pair = addElements(`<textarea>${LONG_TEXT}</textarea>`);
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assert_greater_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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pair = addElements(`<textarea placeholder="${LONG_TEXT}"></textarea>`);
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assert_greater_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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}, 'Auto width and auto height with a long text');
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test(() => {
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let pair = addElements('<textarea style="width:20ch; height:2lh"></textarea>');
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="width:20ch; height:2lh">${LONG_TEXT}</textarea>`);
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="width:20ch; height:2lh" placeholder="${LONG_TEXT}"></textarea>`);
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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}, 'Explicit width and heigth');
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test(() => {
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let pair = addElements('<textarea style="width:20ch"></textarea>');
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_less_than(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="width:20ch">${LONG_TEXT}</textarea>`);
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_greater_than(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="width:20ch" placeholder="${LONG_TEXT}"></textarea>`);
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assert_equals(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_greater_than(pair.content.offsetHeight, pair.fixed.offsetHeight);
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}, 'Explicit width and auto height');
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test(() => {
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let pair = addElements('<textarea style="height:2lh"></textarea>');
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assert_less_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="height:2lh">${LONG_TEXT}</textarea>`);
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assert_greater_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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pair = addElements(`<textarea style="height:2lh" placeholder="${LONG_TEXT}"></textarea>`);
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assert_greater_than(pair.content.offsetWidth, pair.fixed.offsetWidth);
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assert_equals(pair.content.offsetHeight, pair.fixed.offsetHeight);
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}, 'Explicit height and auto width');
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test(() => {
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let pair = addTwoElements(`<textarea class="disable-default small-placeholder"></textarea>`,
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`<textarea class="disable-default small-placeholder" placeholder="foo"></textarea>`);
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assert_less_than(pair.e1.offsetWidth, pair.e2.offsetWidth);
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assert_equals(pair.e1.offsetHeight, pair.e2.offsetHeight);
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}, 'Text caret is taller than the placeholder');
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test(() => {
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let pair = addTwoElements(`<textarea class="disable-default large-placeholder"></textarea>`,
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`<textarea class="disable-default large-placeholder" placeholder="foo"></textarea>`);
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assert_less_than(pair.e1.offsetWidth, pair.e2.offsetWidth, 'width');
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assert_less_than(pair.e1.offsetHeight, pair.e2.offsetHeight, 'height');
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}, 'Text caret is shorter than the placeholder');
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test(() => {
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const container = document.querySelector('#container');
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container.innerHTML = '<textarea></textarea>';
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const element = container.firstChild;
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const w = element.offsetWidth;
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const h = element.offsetHeight;
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element.classList.add('disable-default');
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assert_less_than(element.offsetWidth, w);
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assert_less_than(element.offsetHeight, h);
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}, 'Update field-sizing property dynamically');
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</script>
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</body>
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