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node_modules/element-plus/es/components/slot/src/only-child.mjs

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+import { isObject } from "../../../utils/types.mjs";
+import { debugWarn } from "../../../utils/error.mjs";
+import { NOOP } from "../../../utils/functions.mjs";
+import { useNamespace } from "../../../hooks/use-namespace/index.mjs";
+import { FORWARD_REF_INJECTION_KEY, useForwardRefDirective } from "../../../hooks/use-forward-ref/index.mjs";
+import { Comment, Fragment, Text, cloneVNode, createVNode, defineComponent, inject, withDirectives } from "vue";
+//#region ../../packages/components/slot/src/only-child.tsx
+const NAME = "ElOnlyChild";
+const OnlyChild = /* @__PURE__ */ defineComponent({
+	name: NAME,
+	setup(_, { slots, attrs }) {
+		const forwardRefDirective = useForwardRefDirective(inject(FORWARD_REF_INJECTION_KEY)?.setForwardRef ?? NOOP);
+		return () => {
+			const defaultSlot = slots.default?.(attrs);
+			if (!defaultSlot) return null;
+			const [firstLegitNode, length] = findFirstLegitChild(defaultSlot);
+			if (!firstLegitNode) {
+				debugWarn(NAME, "no valid child node found");
+				return null;
+			}
+			if (length > 1) debugWarn(NAME, "requires exact only one valid child.");
+			return withDirectives(cloneVNode(firstLegitNode, attrs), [[forwardRefDirective]]);
+		};
+	}
+});
+function findFirstLegitChild(node) {
+	if (!node) return [null, 0];
+	const children = node;
+	const len = children.filter((c) => c.type !== Comment).length;
+	for (const child of children) {
+		/**
+		* when user uses h(Fragment, [text]) to render plain string,
+		* this switch case just cannot handle, when the value is primitives
+		* we should just return the wrapped string
+		*/
+		if (isObject(child)) switch (child.type) {
+			case Comment: continue;
+			case Text:
+			case "svg": return [wrapTextContent(child), len];
+			case Fragment: return findFirstLegitChild(child.children);
+			default: return [child, len];
+		}
+		return [wrapTextContent(child), len];
+	}
+	return [null, 0];
+}
+function wrapTextContent(s) {
+	return createVNode("span", { "class": useNamespace("only-child").e("content") }, [s]);
+}
+//#endregion
+export { OnlyChild };
+
+//# sourceMappingURL=only-child.mjs.map