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<!doctype html>

onload = function() {

test(() => {

let frame = document.querySelector("iframe");

let win = frame.contentWindow;

frame.remove();

assert_true(!!win.screen, "Window.screen should be available");

for (let prop of ["top", "left", "width", "height"]) {

let availProp = "avail" + prop[0].toUpperCase() + prop.substr(1);

if (prop == "width" || prop == "height") {

assert_true(prop in win.screen, prop + "must be implemented per spec")

assert_true(availProp in win.screen, availProp + "must be implemented per spec")

}

if (prop in win.screen) {

assert_equals(win.screen[prop], 0, prop);

}

if (availProp in win.screen) {

assert_equals(win.screen[availProp], 0, availProp);

}

// https://drafts.csswg.org/cssom-view/#dom-screen-colordepth

// If the user agent does not know the color depth or does not want to

// return it for privacy considerations, it should return 24.

for (let prop of ["colorDepth", "pixelDepth"]) {

assert_equals(win.screen[prop], 24, prop);

}

}, "Window.screen on detached frame");

};

</script>