1

admin/node_modules/element-plus/es/directives/trap-focus/index.mjs

@@ -0,0 +1,55 @@
+import { nextTick } from 'vue';
+import { obtainAllFocusableElements } from '../../utils/dom/aria.mjs';
+import { EVENT_CODE } from '../../constants/aria.mjs';
+
+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 focusableElement = FOCUS_STACK[FOCUS_STACK.length - 1][FOCUSABLE_CHILDREN];
+  if (focusableElement.length > 0 && e.code === 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();
+    }
+  }
+};
+const TrapFocus = {
+  beforeMount(el) {
+    el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
+    FOCUS_STACK.push(el);
+    if (FOCUS_STACK.length <= 1) {
+      document.addEventListener("keydown", FOCUS_HANDLER);
+    }
+  },
+  updated(el) {
+    nextTick(() => {
+      el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
+    });
+  },
+  unmounted() {
+    FOCUS_STACK.shift();
+    if (FOCUS_STACK.length === 0) {
+      document.removeEventListener("keydown", FOCUS_HANDLER);
+    }
+  }
+};
+
+export { FOCUSABLE_CHILDREN, TRAP_FOCUS_HANDLER, TrapFocus as default };
+//# sourceMappingURL=index.mjs.map