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65 lines
2.0 KiB
65 lines
2.0 KiB
1 month ago
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import { nextTick } from 'vue';
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import '../../utils/index.mjs';
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import '../../constants/index.mjs';
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import { EVENT_CODE } from '../../constants/aria.mjs';
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import { obtainAllFocusableElements } from '../../utils/dom/aria.mjs';
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const FOCUSABLE_CHILDREN = "_trap-focus-children";
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const TRAP_FOCUS_HANDLER = "_trap-focus-handler";
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const FOCUS_STACK = [];
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const FOCUS_HANDLER = (e) => {
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var _a;
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if (FOCUS_STACK.length === 0)
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return;
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const focusableElement = FOCUS_STACK[FOCUS_STACK.length - 1][FOCUSABLE_CHILDREN];
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if (focusableElement.length > 0 && e.code === EVENT_CODE.tab) {
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if (focusableElement.length === 1) {
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e.preventDefault();
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if (document.activeElement !== focusableElement[0]) {
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focusableElement[0].focus();
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}
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return;
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}
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const goingBackward = e.shiftKey;
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const isFirst = e.target === focusableElement[0];
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const isLast = e.target === focusableElement[focusableElement.length - 1];
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if (isFirst && goingBackward) {
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e.preventDefault();
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focusableElement[focusableElement.length - 1].focus();
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}
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if (isLast && !goingBackward) {
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e.preventDefault();
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focusableElement[0].focus();
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}
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if (process.env.NODE_ENV === "test") {
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const index = focusableElement.indexOf(e.target);
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if (index !== -1) {
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(_a = focusableElement[goingBackward ? index - 1 : index + 1]) == null ? void 0 : _a.focus();
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}
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}
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}
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};
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const TrapFocus = {
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beforeMount(el) {
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el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
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FOCUS_STACK.push(el);
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if (FOCUS_STACK.length <= 1) {
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document.addEventListener("keydown", FOCUS_HANDLER);
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}
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},
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updated(el) {
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nextTick(() => {
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el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
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});
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},
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unmounted() {
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FOCUS_STACK.shift();
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if (FOCUS_STACK.length === 0) {
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document.removeEventListener("keydown", FOCUS_HANDLER);
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}
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}
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};
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export { FOCUSABLE_CHILDREN, TRAP_FOCUS_HANDLER, TrapFocus as default };
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//# sourceMappingURL=index.mjs.map
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