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141 lines
4.8 KiB
HTML
141 lines
4.8 KiB
HTML
<!DOCTYPE html>
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<title>cssom-view - scroll-behavior: smooth</title>
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<meta name="timeout" content="long">
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<link rel="author" title="Rune Lillesveen" href="mailto:futhark@chromium.org">
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<link rel="help" href="https://drafts.csswg.org/cssom-view/#smooth-scrolling">
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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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.filler { height: 10000px }
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.smooth {
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scroll-behavior: smooth;
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}
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#scrollable {
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overflow: scroll;
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width: 100px;
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height: 100px;
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}
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</style>
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<div id="testContainer">
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<div id="scrollable">
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<div class="filler"></div>
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</div>
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<div class="filler"></div>
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</div>
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<script>
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test(() => {
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scrollable.scrollTo(0, 5000);
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assert_equals(scrollable.scrollTop, 5000, "Initially scrolls instantly");
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scrollable.scrollTo(0, 0);
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scrollable.className = "smooth";
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scrollable.scrollTo(0, 5000);
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assert_less_than(scrollable.scrollTop, 5000, "scroll-behavior:smooth should not scroll instantly");
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scrollable.className = "";
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scrollable.scrollTo(0, 0);
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}, "scroll-behavior: smooth on DIV element");
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test(() => {
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window.scrollTo(0, 5000);
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assert_equals(window.scrollY, 5000, "Initially scrolls instantly");
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window.scrollTo(0, 0);
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document.documentElement.className = "smooth";
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assert_less_than(window.scrollY, 5000, "scroll-behavior:smooth should not scroll instantly");
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document.documentElement.className = "";
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window.scrollTo(0, 0);
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}, "HTML element scroll-behavior should propagate to viewport");
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test(() => {
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window.scrollTo(0, 5000);
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assert_equals(window.scrollY, 5000, "Initially scrolls instantly");
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window.scrollTo(0, 0);
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document.body.className = "smooth";
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window.scrollTo(0, 5000);
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assert_equals(window.scrollY, 5000, "scroll-behavior:smooth on BODY should scroll viewport instantly");
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document.body.className = "";
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window.scrollTo(0, 0);
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}, "BODY element scroll-behavior should not propagate to viewport");
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var instantHistoryNavigationTest =
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async_test("Instant scrolling while doing history navigation.");
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var smoothHistoryNavigationTest =
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async_test("Smooth scrolling while doing history navigation.");
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function instant() {
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document.documentElement.className = "";
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document.body.className = "";
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window.scrollTo(0, 0);
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var p = document.createElement("pre");
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p.textContent = new Array(1000).join("newline\n");
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var a = document.createElement("a");
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a.href = "#";
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a.name = "foo";
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a.textContent = "foo";
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p.appendChild(a);
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document.body.appendChild(p);
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window.onhashchange = function() {
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window.onhashchange = function() {
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instantHistoryNavigationTest.step(function() {
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assert_equals(location.hash, "", "Shouldn't be scrolled to a fragment.");
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assert_equals(window.scrollY, 0, "Shouldn't be scrolled back to top yet.");
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});
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p.remove();
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instantHistoryNavigationTest.done();
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smooth();
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}
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instantHistoryNavigationTest.step(function() {
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assert_equals(location.hash, "#foo", "Should be scrolled to a fragment.");
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assert_not_equals(window.scrollY, 0, "Shouldn't be scrolled to top anymore.");
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});
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history.back();
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}
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instantHistoryNavigationTest.step(function() {
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assert_equals(window.scrollY, 0, "Should be scrolled to top.");
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assert_equals(location.hash, "", "Shouldn't be scrolled to a fragment.");
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});
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location.hash = "foo";
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};
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instant();
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function smooth() {
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document.documentElement.className = "";
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document.body.className = "";
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window.scrollTo(0, 0);
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var p = document.createElement("pre");
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p.textContent = new Array(1000).join("newline\n");
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var a = document.createElement("a");
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a.href = "#";
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a.name = "bar";
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a.textContent = "bar";
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p.appendChild(a);
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document.body.appendChild(p);
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window.onhashchange = function() {
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window.onhashchange = function() {
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smoothHistoryNavigationTest.step(function() {
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assert_equals(location.hash, "", "Shouldn't be scrolled to a fragment.");
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assert_not_equals(window.scrollY, 0, "Shouldn't be scrolled back to top yet.");
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});
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p.remove();
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smoothHistoryNavigationTest.done();
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}
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smoothHistoryNavigationTest.step(function() {
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assert_equals(location.hash, "#bar", "Should be scrolled to a fragment.");
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assert_not_equals(window.scrollY, 0, "Shouldn't be scrolled to top anymore.");
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});
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history.back();
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}
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smoothHistoryNavigationTest.step(function() {
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assert_equals(window.scrollY, 0, "Should be scrolled to top.");
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assert_equals(location.hash, "", "Shouldn't be scrolled to a fragment.");
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});
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location.hash = "bar";
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document.documentElement.className = "smooth";
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};
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testContainer.style.display = "none";
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</script>
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