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<!doctype html>
<meta charset=utf-8>
<title>Animating CSS logical properties using CSS Transitions</title>
<link rel="help" href="https://drafts.csswg.org/css-logical/#box">
<meta name="assert" content="The specified values of these properties are separate from the specified values of the parallel physical properties, but the flow-relative and physical properties share computed values.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../css-animations/support/testcommon.js"></script>
<div id="log"></div>
<div id="test"></div>
<script>
'use strict';
const testEl = document.getElementById("test");
function makeDeclaration(object = {}) {
return Object.entries(object).map(([prop, val]) => prop + ": " + val).join("; ");
}
/**
* Starts a CSS transition in testEl. By default, the transition will affect the properies
* specified in finalStyles, be linear, last 10 seconds and start halfway, but this can be
* overridden in baseStyles.
*
* @param t The testharness.js Test object.
* @param baseStyles A dictionary object with property names and values to set on the
* element before starting the transition.
* @param finalStyles A dictionary object with property names and values towards which
* the element will transition.
* @param [transitionStyles] An optional dictionary object to costumize the transition.
*/
function transition(t, baseStyles, finalStyles, transitionStyles = {}) {
// Clear styles from previous test.
testEl.style.cssText = "";
testEl.className = "";
getComputedStyle(testEl).height;
// Set base and final styles
addStyle(t, {
"#test": makeDeclaration(baseStyles),
"#test.transition": makeDeclaration(finalStyles),
});
getComputedStyle(testEl).height;
// Set transition styles
const defaultTransition = {
"transition-property": Object.keys(finalStyles).join(", "),
"transition-timing-function": "linear",
"transition-duration": "10s",
"transition-delay": "-5s",
};
addStyle(t, {
"#test": makeDeclaration(Object.assign(defaultTransition, transitionStyles)),
});
// Start the transition
testEl.className = "transition";
}
test(t => {
transition(t, {
"block-size": "0px",
}, {
"block-size": "100px",
});
assert_equals(getComputedStyle(testEl).height, '50px');
}, 'Logical properties can be transitioned');
test(t => {
transition(t, {
"block-size": "0px",
"writing-mode": "vertical-rl",
}, {
"block-size": "100px",
});
assert_equals(getComputedStyle(testEl).width, '50px');
assert_equals(getComputedStyle(testEl).height, '0px');
}, 'Logical properties in transitions respect the writing-mode');
test(t => {
transition(t, {
"margin-inline-start": "0px",
"direction": "rtl",
}, {
"margin-inline-start": "100px",
});
assert_equals(getComputedStyle(testEl).marginLeft, '0px');
assert_equals(getComputedStyle(testEl).marginRight, '50px');
}, 'Logical properties in transitions respect the direction');
test(t => {
transition(t, {
"block-size": "0px",
"height": "200px",
}, {
"block-size": "100px",
"height": "300px",
});
assert_equals(getComputedStyle(testEl).height, '250px');
}, 'Declaration order is respected within declaration blocks');
test(t => {
transition(t, {}, {
"margin-top": "200px",
"margin-block-start": "100px"
}, {
"transition-timing-function": "step-start",
});
assert_equals(getComputedStyle(testEl).marginTop, '100px');
}, 'Logical properties are able to override physical properties in declaration blocks');
test(t => {
transition(t, {}, {
"margin-inline": "200px",
"margin-inline-start": "0px",
"margin-inline-start": "100px",
}, {
"transition-timing-function": "step-start",
});
assert_equals(getComputedStyle(testEl).marginLeft, '100px');
}, 'Declaration order is respected amongst logical properties within declaration blocks');
test(t => {
transition(t, {
"block-size": "200px",
}, {
"height": "300px",
});
assert_equals(getComputedStyle(testEl).height, '250px');
}, 'Physical properties and logical properties can be mixed');
test(t => {
transition(t, {
"height": "100px",
"block-size": "200px",
}, {
"block-size": "100px",
"height": "300px",
});
assert_equals(getComputedStyle(testEl).height, '250px');
}, 'Declaration order is respected on each keyframe individually');
test(t => {
transition(t, {
"width": "0px",
"height": "0px",
"block-size": "0px",
}, {
"block-size": "100px",
});
assert_equals(getComputedStyle(testEl).width, '0px');
assert_equals(getComputedStyle(testEl).height, '50px');
testEl.style.writingMode = 'vertical-rl';
assert_equals(getComputedStyle(testEl).width, '50px');
assert_equals(getComputedStyle(testEl).height, '0px');
}, 'Transitions update when the writing-mode is changed');
promise_test(async t => {
transition(t, {
"width": "0px",
"height": "0px",
"block-size": "0px",
}, {
"block-size": "100px",
}, {
"transition-delay": "-9.9s",
});
const watcher = new EventWatcher(t, testEl, [ 'transitionend' ]);
await watcher.wait_for('transitionend');
assert_equals(getComputedStyle(testEl).width, '0px');
assert_equals(getComputedStyle(testEl).height, '100px');
testEl.style.transition = 'none';
testEl.style.writingMode = 'vertical-rl';
assert_equals(getComputedStyle(testEl).width, '100px');
assert_equals(getComputedStyle(testEl).height, '0px');
}, 'Filling transitions update when the writing-mode is changed');
test(t => {
transition(t, {
"width": "0px",
"height": "0px",
}, {
"block-size": "100px",
"height": "200px",
});
// Initially we are interpolating the height from 0 to 200px
assert_equals(getComputedStyle(testEl).width, '0px');
assert_equals(getComputedStyle(testEl).height, '100px');
// But once we change the writing-mode, we will be interpolating *both*
// the height (from 0px to 200px) *and* the width (from 0px to 100px).
testEl.style.writingMode = 'vertical-rl';
assert_equals(getComputedStyle(testEl).width, '50px');
assert_equals(getComputedStyle(testEl).height, '100px');
}, 'The number of interpolating properties can be increased when the'
+ ' writing-mode is changed');
test(t => {
transition(t, {
"width": "100px",
"height": "100px",
}, {
"width": "500px",
"block-size": "200px",
});
// Initially we are interpolating the width (100px -> 500px) and the height
// (100px -> 200px).
assert_equals(getComputedStyle(testEl).width, '300px');
assert_equals(getComputedStyle(testEl).height, '150px');
// Once we change the writing-mode, we will be interpolating *only* the
// width (300px -> 200px).
testEl.style.writingMode = 'vertical-rl';
assert_equals(getComputedStyle(testEl).width, '250px');
assert_equals(getComputedStyle(testEl).height, '100px');
}, 'The number of interpolating properties can be decreased when the'
+ ' writing-mode is changed');
test(t => {
addStyle(t, { ':root': '--writingMode: horizontal-tb' });
transition(t, {
"width": "0px",
"height": "0px",
"writing-mode": "var(--writingMode)",
"block-size": "0px",
}, {
"block-size": "100px"
});
assert_equals(getComputedStyle(testEl).width, '0px');
assert_equals(getComputedStyle(testEl).height, '50px');
testEl.style.setProperty('--writingMode', 'vertical-rl');
assert_equals(getComputedStyle(testEl).width, '50px');
assert_equals(getComputedStyle(testEl).height, '0px');
}, 'Transitions update when the writing-mode is changed through a CSS variable');
test(t => {
transition(t, {
"margin-inline-start": "0px",
}, {
"margin-inline-start": "100px",
});
assert_equals(getComputedStyle(testEl).marginLeft, '50px');
assert_equals(getComputedStyle(testEl).marginRight, '0px');
testEl.style.direction = 'rtl';
assert_equals(getComputedStyle(testEl).marginLeft, '0px');
assert_equals(getComputedStyle(testEl).marginRight, '50px');
}, 'Transitions update when the direction is changed');
test(t => {
transition(t, {
"margin-inline-start": "100px",
}, {
"margin-left": "200px",
});
assert_equals(getComputedStyle(testEl).marginLeft, '150px');
assert_equals(getComputedStyle(testEl).marginRight, '0px');
testEl.style.direction = 'rtl';
assert_equals(getComputedStyle(testEl).marginLeft, '150px');
assert_equals(getComputedStyle(testEl).marginRight, '100px');
}, 'Transitions from logical to physical update when the direction is changed');
test(t => {
transition(t, {
"margin-left": "200px",
}, {
"margin-inline-start": "100px",
});
assert_equals(getComputedStyle(testEl).marginLeft, '150px');
assert_equals(getComputedStyle(testEl).marginRight, '0px');
testEl.style.direction = 'rtl';
assert_equals(getComputedStyle(testEl).marginLeft, '200px');
assert_equals(getComputedStyle(testEl).marginRight, '50px');
}, 'Transitions from physical to logical update when the direction is changed');
</script>
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