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frontend/node_modules/element-plus/lib/directives/trap-focus/index.js

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+Object.defineProperties(exports, { __esModule: { value: true }, [Symbol.toStringTag]: { value: 'Module' } });
+const require_runtime = require('../../_virtual/_rolldown/runtime.js');
+const require_aria = require('../../utils/dom/aria.js');
+const require_aria$1 = require('../../constants/aria.js');
+const require_event = require('../../utils/dom/event.js');
+let vue = require("vue");
+
+//#region ../../packages/directives/trap-focus/index.ts
+const FOCUSABLE_CHILDREN = "_trap-focus-children";
+const TRAP_FOCUS_HANDLER = "_trap-focus-handler";
+const FOCUS_STACK = [];
+const FOCUS_HANDLER = (e) => {
+	if (FOCUS_STACK.length === 0) return;
+	const code = require_event.getEventCode(e);
+	const focusableElement = FOCUS_STACK[FOCUS_STACK.length - 1][FOCUSABLE_CHILDREN];
+	if (focusableElement.length > 0 && code === require_aria$1.EVENT_CODE.tab) {
+		if (focusableElement.length === 1) {
+			e.preventDefault();
+			if (document.activeElement !== focusableElement[0]) focusableElement[0].focus();
+			return;
+		}
+		const goingBackward = e.shiftKey;
+		const isFirst = e.target === focusableElement[0];
+		const isLast = e.target === focusableElement[focusableElement.length - 1];
+		if (isFirst && goingBackward) {
+			e.preventDefault();
+			focusableElement[focusableElement.length - 1].focus();
+		}
+		if (isLast && !goingBackward) {
+			e.preventDefault();
+			focusableElement[0].focus();
+		}
+		if (process.env.NODE_ENV === "test") {
+			const index = focusableElement.indexOf(e.target);
+			if (index !== -1) focusableElement[goingBackward ? index - 1 : index + 1]?.focus();
+		}
+	}
+};
+const TrapFocus = {
+	beforeMount(el) {
+		el[FOCUSABLE_CHILDREN] = require_aria.obtainAllFocusableElements(el);
+		FOCUS_STACK.push(el);
+		if (FOCUS_STACK.length <= 1) document.addEventListener("keydown", FOCUS_HANDLER);
+	},
+	updated(el) {
+		(0, vue.nextTick)(() => {
+			el[FOCUSABLE_CHILDREN] = require_aria.obtainAllFocusableElements(el);
+		});
+	},
+	unmounted() {
+		FOCUS_STACK.shift();
+		if (FOCUS_STACK.length === 0) document.removeEventListener("keydown", FOCUS_HANDLER);
+	}
+};
+
+//#endregion
+exports.FOCUSABLE_CHILDREN = FOCUSABLE_CHILDREN;
+exports.TRAP_FOCUS_HANDLER = TRAP_FOCUS_HANDLER;
+exports.default = TrapFocus;
+//# sourceMappingURL=index.js.map