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Test Info:
- Manifest: dom/l10n/tests/mochitest/chrome.toml
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test DOMLocalization.prototype.connectRoot with Web Components</title>
<script type="application/javascript">
"use strict";
const l10nReg = new L10nRegistry();
const fs = [
{ path: "/localization/en-US/mock.ftl", source: `
key1 = Key 1
key2 = Key 2
key3 = Key 3
key4 = Key 4
` },
];
const source = L10nFileSource.createMock("test", "app", ["en-US"], "/localization/{locale}", fs);
l10nReg.registerSources([source]);
document.domLoc = new DOMLocalization(
["/mock.ftl"],
false,
l10nReg,
["en-US"],
);
document.domLoc.connectRoot(document.documentElement);
</script>
<script type="application/javascript">
// In this test we're going to use two elements - `shadowLabel` and `lightLabel`.
// We create a new `DOMLocalization` and connect it to the document's root first.
//
// Then, we connect and disconnect it on root and element within the shadow DOM and
// apply new `data-l10n-id` onto both labels.
// Once the `lightLabel` get a new translation, we check what happened to the `shadowLabel`
// to ensure that depending on the status of connection between the shadow DOM and the `DOMLocalization`
// the `shadowLabel` either gets translated or not.
SimpleTest.waitForExplicitFinish();
class FluentWidget extends HTMLElement {
constructor() {
super();
const shadowRoot = this.attachShadow({mode: "open"});
const t = document.querySelector("#fluent-widget-template");
const instance = t.content.cloneNode(true);
shadowRoot.appendChild(instance);
}
connectedCallback() {
this.runTests();
}
runTests() {
// First, let's verify that the mutation will not be applied since
// the shadow DOM is not connected to the `DOMLocalization`.
let shadowLabel = this.shadowRoot.getElementById("shadowLabel");
let lightLabel = document.getElementById("lightLabel");
let verifyL10n = () => {
if (lightLabel.textContent == "Key 1") {
is(shadowLabel.textContent, "", "document.l10n content not applied to an element in the shadow DOM");
window.removeEventListener("MozAfterPaint", verifyL10n);
this.testPart2();
}
};
window.addEventListener("MozAfterPaint", verifyL10n);
document.domLoc.setAttributes(shadowLabel, "key1");
document.domLoc.setAttributes(lightLabel, "key1");
}
testPart2() {
// Next, we connect the shadow root to DOMLocalization and the next attribute
// change should result in a translation being applied.
document.domLoc.connectRoot(this.shadowRoot);
let shadowLabel = this.shadowRoot.getElementById("shadowLabel");
let lightLabel = document.getElementById("lightLabel");
// Test that mutation was applied.
let verifyL10n = () => {
if (lightLabel.textContent == "Key 2") {
is(shadowLabel.textContent, "Key 2", "document.l10n content applied to an element in the shadow DOM");
window.removeEventListener("MozAfterPaint", verifyL10n);
this.testPart3();
}
};
window.addEventListener("MozAfterPaint", verifyL10n);
document.domLoc.setAttributes(shadowLabel, "key2");
document.domLoc.setAttributes(lightLabel, "key2");
}
testPart3() {
// After we disconnect the shadow root, the mutations should
// not be applied onto the `shadowLabel`.
document.domLoc.disconnectRoot(this.shadowRoot);
let shadowLabel = this.shadowRoot.getElementById("shadowLabel");
let lightLabel = document.getElementById("lightLabel");
let verifyL10n = () => {
if (lightLabel.textContent == "Key 3") {
is(shadowLabel.textContent, "Key 2", "document.l10n content not applied to an element in the shadow DOM");
window.removeEventListener("MozAfterPaint", verifyL10n);
this.testPart4();
}
};
window.addEventListener("MozAfterPaint", verifyL10n);
document.domLoc.setAttributes(shadowLabel, "key3");
document.domLoc.setAttributes(lightLabel, "key3");
}
testPart4() {
// Finally, we'll connect it back, but this time, we'll connect
// not the shadow root, but an element within it.
// This should still result in the `shadowLabel` receiving a new translation.
document.domLoc.connectRoot(this.shadowRoot.getElementById("shadowDiv"));
let shadowLabel = this.shadowRoot.getElementById("shadowLabel");
let lightLabel = document.getElementById("lightLabel");
// Test that mutation was applied.
let verifyL10n = () => {
if (lightLabel.textContent == "Key 4") {
is(shadowLabel.textContent, "Key 4", "document.l10n content applied to an element in the shadow DOM");
window.removeEventListener("MozAfterPaint", verifyL10n);
SimpleTest.finish();
}
};
window.addEventListener("MozAfterPaint", verifyL10n);
document.domLoc.setAttributes(shadowLabel, "key4");
document.domLoc.setAttributes(lightLabel, "key4");
}
}
customElements.define("fluent-widget", FluentWidget);
</script>
</head>
<body>
<p id="lightLabel"></p>
<template id="fluent-widget-template">
<div id="shadowDiv">
<p id="shadowLabel"></p>
</div>
</template>
<fluent-widget id="widget1"></fluent-widget>
</body>
</html>