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<!doctype html>
<meta charset="utf-8">
<title>Test for bug 1658302: We don't reframe for placeholder attribute value changes.</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<input id="input">
<textarea id="textarea"></textarea>
<script>
SimpleTest.waitForExplicitFinish();
const utils = SpecialPowers.DOMWindowUtils;
function expectReframe(shouldHaveReframed, callback) {
document.documentElement.offsetTop;
const previousConstructCount = utils.framesConstructed;
const previousReflowCount = utils.framesReflowed;
callback();
document.documentElement.offsetTop;
isnot(previousReflowCount, utils.framesReflowed, "We should have reflowed");
(shouldHaveReframed ? isnot : is)(previousConstructCount,
utils.framesConstructed,
`We should ${shouldHaveReframed ? "" : "not"} have reframed`);
}
for (const control of document.querySelectorAll("input, textarea")) {
// Creating the placeholder attribute reframes right now.
//
// TODO: Could be avoided with some more work.
expectReframe(true, () => {
control.placeholder = "foo";
});
// Incrementally changing it should not reframe, just reflow.
expectReframe(false, () => {
control.placeholder = "bar";
});
// Removing the placeholder attribute reframes right now.
//
// TODO: Could maybe be avoided with some more work.
expectReframe(true, () => {
control.removeAttribute("placeholder");
});
}
SimpleTest.finish();
</script>