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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /html/dom/elements/global-attributes/lang-attribute-shadow.window.html - WPT Dashboard Interop Dashboard
const TESTS = [
{
title: "lang only on slot",
light_tree: `
<div id="host" data-expected="en-US"><span data-expected="en-US"></span></div>
`,
shadow_tree: `
<slot lang="en-AU" data-expected="en-AU"></slot>
`,
},
{
title: "lang only on host",
light_tree: `
<div id="host" lang="en-AU" data-expected="en-AU"><span data-expected="en-AU"></span></div>
`,
shadow_tree: `
<slot data-expected="en-AU"></slot>
`,
},
{
title: "lang on host and slot",
light_tree: `
<div id="host" lang="en-AU" data-expected="en-AU"><span data-expected="en-AU"></span></div>
`,
shadow_tree: `
<slot lang="en-GB" data-expected="en-GB"></slot>
`,
},
{
title: "lang on host and slotted element",
light_tree: `
<div id="host" lang="en-AU" data-expected="en-AU"><span lang="en-GB" data-expected="en-GB"></span></div>
`,
shadow_tree: `
<slot data-expected="en-AU"></slot>
`,
},
{
title: "lang on host and slot and slotted element",
light_tree: `
<div id="host" lang="en-AU" data-expected="en-AU"><span lang="en-GB" data-expected="en-GB"></span></div>
`,
shadow_tree: `
<slot lang="en-NZ" data-expected="en-NZ"></slot>
`,
},
{
title: "lang on slot inherits from parent",
light_tree: `
<div id="host" lang="en-GB" data-expected="en-GB"><span lang="en-US" data-expected="en-US"></span></div>
`,
shadow_tree: `
<div lang="en-CA" data-expected="en-CA">
<slot data-expected="en-CA"></slot>
</div>
`,
},
];
const container = document.createElement("div");
document.body.append(container);
container.lang = "en-US";
for (const obj of TESTS) {
test(() => {
container.innerHTML = obj.light_tree;
let shadow = container.querySelector("#host").attachShadow({mode: "open"});
shadow.innerHTML = obj.shadow_tree;
for (const element of Array.from(container.querySelectorAll("[data-expected]")).concat(Array.from(shadow.querySelectorAll("[data-expected]")))) {
const expected = element.getAttribute("data-expected");
assert_true(element.matches(`:lang(${expected})`), `element matches expected language ${expected}`);
for (const other_lang of ["en-US", "en-AU", "en-GB", "en-NZ", "en-CA"]) {
if (expected != other_lang) {
assert_false(element.matches(`:lang(${other_lang})`), `element does not match language ${other_lang}`);
}
}
}
}, obj.title);
}
container.remove();