element-plus
Version:
A Component Library for Vue 3
55 lines (53 loc) • 2.15 kB
JavaScript
const require_runtime = require('../../../_virtual/_rolldown/runtime.js');
const require_error = require('../../../utils/error.js');
const require_index = require('../../../hooks/use-namespace/index.js');
const require_index$1 = require('../../../hooks/use-forward-ref/index.js');
let vue = require("vue");
let _vue_shared = require("@vue/shared");
//#region ../../packages/components/slot/src/only-child.tsx
const NAME = "ElOnlyChild";
const OnlyChild = /* @__PURE__ */ (0, vue.defineComponent)({
name: NAME,
setup(_, { slots, attrs }) {
const forwardRefDirective = require_index$1.useForwardRefDirective((0, vue.inject)(require_index$1.FORWARD_REF_INJECTION_KEY)?.setForwardRef ?? _vue_shared.NOOP);
return () => {
const defaultSlot = slots.default?.(attrs);
if (!defaultSlot) return null;
const [firstLegitNode, length] = findFirstLegitChild(defaultSlot);
if (!firstLegitNode) {
require_error.debugWarn(NAME, "no valid child node found");
return null;
}
if (length > 1) require_error.debugWarn(NAME, "requires exact only one valid child.");
return (0, vue.withDirectives)((0, vue.cloneVNode)(firstLegitNode, attrs), [[forwardRefDirective]]);
};
}
});
function findFirstLegitChild(node) {
if (!node) return [null, 0];
const children = node;
const len = children.filter((c) => c.type !== vue.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 ((0, _vue_shared.isObject)(child)) switch (child.type) {
case vue.Comment: continue;
case vue.Text:
case "svg": return [wrapTextContent(child), len];
case vue.Fragment: return findFirstLegitChild(child.children);
default: return [child, len];
}
return [wrapTextContent(child), len];
}
return [null, 0];
}
function wrapTextContent(s) {
const ns = require_index.useNamespace("only-child");
return (0, vue.createVNode)("span", { "class": ns.e("content") }, [s]);
}
//#endregion
exports.OnlyChild = OnlyChild;
//# sourceMappingURL=only-child.js.map