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<!DOCTYPE html>
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<div id="target"></div>
<script>
animation_test({
syntax: "<time>+",
inherits: false,
initialValue: "0s"
}, {
keyframes: ["100s 150s", "200s 250s"],
expected: "150s 200s"
}, 'Animating a custom property of type <time>+');
animation_test({
syntax: "<time>+",
inherits: false,
initialValue: "100s 150s"
}, {
keyframes: "200s 250s",
expected: "150s 200s"
}, 'Animating a custom property of type <time>+ with a single keyframe');
animation_test({
syntax: "<time>+",
inherits: false,
initialValue: "50s 100s"
}, {
composite: "add",
keyframes: ["150s 200s", "250s 300s"],
expected: "250s 350s"
}, 'Animating a custom property of type <time>+ with additivity');
animation_test({
syntax: "<time>+",
inherits: false,
initialValue: "50s 100s"
}, {
composite: "add",
keyframes: "150s 200s",
expected: "125s 200s"
}, 'Animating a custom property of type <time>+ with a single keyframe and additivity');
animation_test({
syntax: "<time>+",
inherits: false,
initialValue: "0s 0s"
}, {
iterationComposite: "accumulate",
keyframes: ["0s 50s", "100s 100s"],
expected: "250s 275s"
}, 'Animating a custom property of type <time>+ with iterationComposite');
discrete_animation_test("<time>+", '10s 20s', '30s', 'Animating a custom property of type <time>+ with different lengths is discrete');
</script>
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