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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /dom/ranges/tentative/OpaqueRange-validation.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<textarea>Hello</textarea>
</body>
<script>
test(() => {
const textarea = document.querySelector('textarea');
// Out-of-bounds offsets should throw.
assert_throws_dom("IndexSizeError", () => textarea.getValueRange(10, 15));
}, "getValueRange throws IndexSizeError for out-of-bounds offsets.");
test(() => {
const textarea = document.querySelector('textarea');
// [start, end, shouldThrow, expectedStart, expectedEnd, expectedCollapsed].
[
// Valid forward ranges.
[0, 5, false, 0, 5, false],
[1, 4, false, 1, 4, false],
[0, 0, false, 0, 0, true],
[5, 5, false, 5, 5, true],
// Backwards ranges that auto-collapse, but don't throw.
[5, 2, false, 5, 5, true],
[4, 1, false, 4, 4, true],
[3, 0, false, 3, 3, true],
// Ranges that are out-of-bounds and should throw.
[0, 6, true],
[6, 6, true],
[10, 5, true],
[10, 15, true],
].forEach(([start, end, shouldThrow, expectedStart, expectedEnd, expectedCollapsed]) => {
if (shouldThrow) {
assert_throws_dom("IndexSizeError", () => textarea.getValueRange(start, end),
`[${start}, ${end}] should throw`);
} else {
const range = textarea.getValueRange(start, end);
assert_equals(range.startOffset, expectedStart, `[${start}, ${end}] startOffset`);
assert_equals(range.endOffset, expectedEnd, `[${start}, ${end}] endOffset`);
assert_equals(range.collapsed, expectedCollapsed, `[${start}, ${end}] collapsed`);
}
});
}, "getValueRange handles all range types correctly: forward, backwards, and out-of-bounds.");
</script>