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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/manual/draw-element-image/shadow-dom-slotted-moveBefore.tentative.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<title>Canvas.drawElementImage: Assigning an element to a slot draws correctly</title>
<link rel="author" href="mailto:schenney@chromium.org">
<link rel="match" href="basic-rect-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/html/canvas/resources/wait-for-canvas-paint.js"></script>
<style>
#canvas {
background: grey;
}
</style>
<canvas id=canvas width="200" height="200" layoutsubtree>
<div id="shadowHost">
<template shadowrootmode="open">
<!-- Put the style here to confirm the div is slotted-->
<style>
::slotted(div) {
width: 100px;
height: 100px;
background: green;
}
</style>
<slot name="slot1"></slot>
</template>
</div>
<div id="slotted" slot="slot1"></div>
</canvas>
<script>
onload = async () => {
// Force one paint.
await new Promise(resolve => {
canvas.addEventListener('paint', resolve, {once: true});
canvas.requestPaint();
});
// This move results in the slotted element actually being slotted.
shadowHost.moveBefore(slotted, null);
// Wait for a rendering lifecycle to complete the move.
await new Promise(resolve => {
canvas.addEventListener('paint', resolve, {once: true});
canvas.requestPaint();
});
canvas.getContext("2d").drawElementImage(shadowHost, 20, 30);
takeScreenshot();
};
</script>
</html>