test(() => {
assert_true(document.documentElement.matches(":dir(ltr)"));
}, "Root element has a direction");
test(() => {
const ele = document.createElement("foobar");
assert_true(ele.matches(":dir(ltr)"));
}, "Element outside the document tree has a direction");
test(() => {
const ele = document.createElementNS("foobar", "foobar");
assert_true(ele.matches(":dir(ltr)"));
}, "Non-HTML element outside the document tree has a direction");
test(() => {
const ele = document.createElement("foobar");
ele.dir = "rtl";
const ele2 = document.createElement("foobar");
ele.append(ele2);
assert_true(ele2.matches(":dir(rtl)"));
ele.dir = "ltr";
assert_true(ele2.matches(":dir(ltr)"), "direction after dynamic change");
}, "Element without direction has parent element direction");
test(() => {
const ele = document.createElement("foobar");
ele.dir = "rtl";
const ele2 = document.createElementNS("foobar", "foobar");
ele.append(ele2);
assert_true(ele2.matches(":dir(rtl)"));
ele.dir = "ltr";
assert_true(ele2.matches(":dir(ltr)"), "direction after dynamic change");
}, "Non-HTML element without direction has parent element direction");
test(() => {
let container1 = document.createElement("div");
document.body.appendChild(container1);
let container2 = document.createElement("div");
for (let container of [container1, container2]) {
container.dir = "rtl";
let e = document.createElement("div");
assert_true(e.matches(":dir(ltr)"));
container.appendChild(e);
assert_false(e.matches(":dir(ltr)"));
e.remove();
assert_true(e.matches(":dir(ltr)"));
}
container1.remove();
}, "dir inheritance is correct after insertion and removal from document");
test(() => {
const ele = document.createElement("foobar");
ele.dir = "auto";
const ele2 = document.createElementNS("foobar", "foobar");
ele.append(ele2);
const text = document.createTextNode("\u05D0\u05D1\u05D2");
ele2.append(text);
assert_true(ele.matches(":dir(rtl)"), "is RTL before change");
assert_true(ele2.matches(":dir(rtl)"), "child is RTL before change");
text.data = "ABC";
assert_true(ele.matches(":dir(ltr)"), "is LTR after change");
assert_true(ele2.matches(":dir(ltr)"), "child is LTR after change");
}, "Non-HTML element text contents influence dir=auto");
for (const tag of ["style", "script"]) {
test(() => {
const e1 = document.createElement("div");
e1.dir = "auto";
const e2 = document.createElement(tag);
const node = document.createTextNode("\u05D0");
e2.appendChild(node);
e1.appendChild(e2);
assert_true(e1.matches(":dir(ltr)", "is LTR before change"));
node.data = "ABC";
assert_true(e1.matches(":dir(ltr)", "is LTR after change"));
}, `${tag} element text contents do not influence dir=auto`);
}
for (const tag of ["style", "script", "input", "textarea"]) {
test(() => {
const e1 = document.createElement("div");
e1.dir = "auto";
const svg = document.createElement("svg");
const e2 = document.createElementNS("http://www.w3.org/2000/svg", tag);
const node = document.createTextNode("\u05D0");
e2.appendChild(node);
svg.appendChild(e2);
e1.appendChild(svg);
assert_true(e1.matches(":dir(rtl)", "is RTL before change"));
node.data = "ABC";
assert_true(e1.matches(":dir(ltr)", "is LTR after change"));
}, `non-html ${tag} element text contents influence dir=auto`);
}
for (const dir of ["auto", "ltr"]) {
test(() => {
const e1 = document.createElement("div");
e1.dir = "auto";
const e2 = document.createElement("div");
e2.dir = dir;
e2.innerText = "A";
e1.append(e2);
assert_true(e1.matches(":dir(ltr)"), "parent is LTR before changes");
assert_true(e2.matches(":dir(ltr)"), "child is LTR before changes");
e2.removeAttribute("dir");
assert_true(e1.matches(":dir(ltr)"), "parent is LTR after removing dir attribute on child");
assert_true(e2.matches(":dir(ltr)"), "child is LTR after removing dir attribute on child");
e2.firstChild.data = "\u05D0";
assert_false(e1.matches(":dir(ltr)"), "parent is RTL after changing text in child");
assert_false(e2.matches(":dir(ltr)"), "child is RTL after changing text in child");
}, `text changes apply to dir=auto on further ancestor after removing dir=${dir} from closer ancestor`);
}
for (const bdi_test of [
{ markup: "<bdi dir=ltr>A</bdi>", expected: "ltr", desc: "dir=ltr with LTR contents" },
{ markup: "<bdi dir=ltr>\u05d0</bdi>", expected: "ltr", desc: "dir=ltr with RTL contents" },
{ markup: "<bdi dir=ltr></bdi>", expected: "ltr", desc: "dir=ltr empty" },
{ markup: "<bdi dir=rtl>A</bdi>", expected: "rtl", desc: "dir=rtl with LTR contents" },
{ markup: "<bdi dir=rtl>\u05d0</bdi>", expected: "rtl", desc: "dir=rtl with RTL contents" },
{ markup: "<bdi dir=rtl></bdi>", expected: "rtl", desc: "dir=rtl empty" },
{ markup: "<bdi dir=auto>A</bdi>", expected: "ltr", desc: "dir=auto with LTR contents" },
{ markup: "<bdi dir=auto>\u05d0</bdi>", expected: "rtl", desc: "dir=auto with RTL contents" },
{ markup: "<bdi dir=auto></bdi>", expected: "ltr", desc: "dir=auto empty" },
{ markup: "<bdi dir=auto>123</bdi>", expected: "ltr", desc: "dir=auto numbers" },
{ markup: "<bdi>A</bdi>", expected: "ltr", desc: "no dir attribute with LTR contents" },
{ markup: "<bdi>\u05d0</bdi>", expected: "rtl", desc: "no dir attribute with RTL contents" },
{ markup: "<bdi></bdi>", expected: "ltr", desc: "no dir attribute empty" },
]) {
for (const parent_dir of [ "ltr", "rtl" ]) {
test(() => {
const parent_element = document.createElement("div");
parent_element.dir = parent_dir;
document.body.appendChild(parent_element);
parent_element.innerHTML = bdi_test.markup;
const bdi_element = parent_element.querySelector("bdi");
let expected = bdi_test.expected;
if (expected == "parent") {
expected = parent_dir;
}
const not_expected = (expected == "ltr") ? "rtl" : "ltr";
assert_true(bdi_element.matches(`:dir(${expected})`));
assert_false(bdi_element.matches(`:dir(${not_expected})`));
parent_element.remove();
}, `directionality of bdi elements: ${bdi_test.desc} in ${parent_dir} parent`);
}
}
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