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"use strict";
{
// private variables are defined with `const` so they don't leak outside this block statement
const IFRAME_DEFAULT_SIZE = "200";
const iframes = new WeakMap();
// helpers are defined with `var` so they are globally accessible
var createMQL = async t => {
const iframe = await createIFrame(t);
const mql = iframe.contentWindow.matchMedia(`(max-width: ${IFRAME_DEFAULT_SIZE}px)`);
assert_true(mql.matches, "MQL should match on newly created <iframe>");
iframes.set(mql, iframe);
return mql;
};
var createIFrame = (t, width = IFRAME_DEFAULT_SIZE, height = width) => {
assert_not_equals(document.body, null, "<body> element is missing");
const iframe = document.createElement("iframe");
iframe.srcdoc = "";
iframe.width = String(width);
iframe.height = String(height);
iframe.style.border = "none";
t.add_cleanup(() => {
document.body.removeChild(iframe);
});
return new Promise(resolve => {
iframe.addEventListener("load", () => {
iframe.contentDocument.body.offsetWidth; // reflow
resolve(iframe);
});
document.body.appendChild(iframe);
});
};
var triggerMQLEvent = mql => {
const iframe = iframes.get(mql);
assert_not_equals(iframe, undefined, "Passed MQL instance was not created with createMQL");
iframe.width = iframe.width === IFRAME_DEFAULT_SIZE ? "250" : IFRAME_DEFAULT_SIZE;
};
var getWindow = mql => {
const iframe = iframes.get(mql);
assert_not_equals(iframe, undefined, "Passed MQL instance was not created with createMQL");
return iframe.contentWindow;
};
var waitForChangesReported = () => {
return new Promise(resolve => {
requestAnimationFrame(() => {
requestAnimationFrame(resolve);
});
});
};
}
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