一文详解如何React中实现插槽

import React from "react";
import ReactDOM from "react-dom/client";
import DemoOne from "./views/DemoOne";

const root = ReactDOM.createRoot(document.getElementById("root"));

root.render(
	<>
		<DemoOne title="我是标题" x={10}>
			<span>哈哈哈</span>
			<span>呵呵呵</span>
		</DemoOne>
		<DemoOne title="嘿嘿嘿">
			<span>嘿嘿嘿</span>
		</DemoOne>
		<DemoOne title="哈哈哈" />
	</>
);

import React from "react";

const DemoOne = function DemoOne(props) {
	let {title, x, children } = props;
	console.log(children);

	return (
		<div className="demo-BOX">
			{children}
		</div>
	);
};

DemoOne.propTypes = {
	title: PropTypes.string.isRequired,
	x: PropTypes.number,
	y: PropTypes.oneOfType([PropTypes.number, PropTypes.bool]),
};

export default DemoOne;

import React from "react";

const DemoOne = function DemoOne(props) {
	let { title, x, children } = props;
	
	if (!children) {
		children = [];
	} else if (!Array.isArray(children)) {
		children = [children];
	}
	console.log(children);

	return (
		<div className="demo-BOX">
			{children[0]}
			{children[1]}
		</div>
	);
};


export default DemoOne;

import React from "react";
import ReactDOM from "react-dom/client";
import DemoOne from "./views/DemoOne";

const root = ReactDOM.createRoot(document.getElementById("root"));

root.render(
	<>
		<DemoOne title="我是标题" x={10}>
			<span slot='footer' >哈哈哈</span>
			<span slot='header' >呵呵呵</span>
		</DemoOne>
		<DemoOne title="嘿嘿嘿">
			<span>嘿嘿嘿</span>
		</DemoOne>
		<DemoOne title="哈哈哈" />
	</>
);

import React from "react";

const DemoOne = function DemoOne(props) {
	let { title, x, children } = props;

	children = React.Children.toArray(children);
	let headerSlot = [],
		footerSlot = [],
		defaultSlot = [];
	children.forEach((child) => {
		//传递进来的插槽信息 都是编译为virtualDOM后传递进来的 而不是传递的标签
		let { slot } = child.props;
		if (slot === "header") {
			headerSlot.push(child);
		} else if (slot === "footer") {
			footerSlot.push(child);
		} else {
			defaultSlot.push(child);
		}
	});
	return (
		<div className="demo-BOX">
			{headerSlot}
			<br />

			<h2 className="title">{title}</h2>
			<span>{x}</span>

			<br />
			{footerSlot}
		</div>
	);
};

export default DemoOne;