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<!doctype html>
<title>Same document navigation to text fragment directives</title>
<meta charset=utf-8>
<link rel="help" href="https://wicg.github.io/ScrollToTextFragment/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
function reset() {
location.hash = '';
window.scrollTo(0, 0);
}
function isInViewport(element) {
const viewportRect = {
left: visualViewport.offsetLeft,
top: visualViewport.offsetTop,
right: visualViewport.offsetLeft + visualViewport.width,
bottom: visualViewport.offsetTop + visualViewport.height
};
const elementRect = element.getBoundingClientRect();
const elementCenter = {
x: elementRect.left + elementRect.width / 2,
y: elementRect.top + elementRect.height / 2
};
return elementCenter.x > viewportRect.left &&
elementCenter.x < viewportRect.right &&
elementCenter.y > viewportRect.top &&
elementCenter.y < viewportRect.bottom;
}
function runTests() {
// Ensure a simple text directive works correctly when navigated to the
// same document using `location.hash`.
promise_test(async t => {
assert_implements(document.fragmentDirective, 'Text directive not implemented');
reset();
location.hash = ':~:text=line%20of%20text';
await t.step_wait(() => window.scrollY > 0, "Wait for scroll");
assert_true(isInViewport(document.getElementById('text')), 'Scrolled to text');
}, 'Basic text directive navigation');
// Test that we correctly fallback to the element id when we have a text
// directive that doesn't match any text in the page.
promise_test(async t => {
assert_implements(document.fragmentDirective, 'Text directive not implemented');
reset();
location.hash = 'elementid:~:text=textDoesntExist';
await t.step_wait(() => window.scrollY > 0, "Wait for scroll");
assert_true(isInViewport(document.getElementById('elementid')), 'Scrolled to `elementid`');
}, 'Basic element id fallback');
// Test that we correctly fallback to the element id when we have a text
// directive that's malformed and won't be parsed.
promise_test(async t => {
assert_implements(document.fragmentDirective, 'Text directive not implemented');
reset();
location.hash = 'elementid:~:text=,,,,,';
await t.step_wait(() => window.scrollY > 0, "Wait for scroll");
assert_true(isInViewport(document.getElementById('elementid')), 'Scrolled to `elementid`');
}, 'Malformed text directive element id fallback');
}
</script>
<style>
div {
margin: 200vh 0 200vh 0;
}
</style>
<body onload="runTests()">
<div id="text">
This is a line of text.
</div>
<div id="elementid">
This div has an id: 'elementid'.
</div>
</body>
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