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<!doctype html>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://html.spec.whatwg.org/#the-input-element">
<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#block-flow">
<title>Test that typing lots of characters inside vertical text inputs doesn't cause scroll position changes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<style>
.spacer {
height: 100vh;
}
input { font-family: monospace; }
</style>
<div class="spacer"></div>
<input id="testInput">
<div class="spacer"></div>
<script>
for (const inputType of ["text", "password", "search", "number"]) {
testInput.type = inputType;
for (const writingMode of ["vertical-lr", "vertical-rl", "sideways-lr", "sideways-rl"]) {
if (!CSS.supports("writing-mode", writingMode))
continue;
promise_test(async t => {
assert_true(
document.documentElement.scrollHeight > document.documentElement.clientHeight,
"Page is scrollable"
);
testInput.style.writingMode = writingMode;
document.documentElement.scrollTop = 0;
t.add_cleanup(() => {
document.documentElement.scrollTop = 0;
testInput.value = "";
});
// Align input to the bottom edge
testInput.scrollIntoView({block: "end", inline: "nearest"});
assert_true(
document.documentElement.scrollTop > 0,
"Successfully scrolled"
);
const oldScrollTop = document.documentElement.scrollTop;
const numCharsToOverflow = document.documentElement.clientHeight / parseInt(getComputedStyle(testInput).fontSize);
const value = "1".repeat(numCharsToOverflow);
testInput.focus({ preventScroll: true });
await test_driver.send_keys(testInput, value);
assert_equals(
document.documentElement.scrollTop,
oldScrollTop,
"Typing lots of characters in input did not cause scrolling"
);
}, `input[type=${inputType}] in ${writingMode}: typing characters in input should not cause the page to scroll`);
}
}
</script>
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