textarea-pagedown-selection.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/the-textarea-element/textarea-pagedown-selection.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>PageDown moves the caret inside the textarea even if not scrollable</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/form-elements.html#the-textarea-element">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div style="height:200vh">

<textarea id="t" style="height:10em;">foo

bar

baz

</textarea>

</div>

<script>

promise_test(async () => {

  t.focus();

  t.setSelectionRange(0, 0);

  SpecialPowers.doCommand(window, "cmd_movePageDown");

  assert_equals(t.selectionStart, t.value.length,

                "caret should move to the end within the textarea");

  assert_equals(t.selectionEnd, t.value.length,

                "selection should stay collapsed at the new caret position");

  assert_equals(window.scrollY, 0, "the root should not have scrolled");

}, "PageDown moves the caret inside the textarea even if not scrollable");

</script>