1.父组件向子组件传参
回调函数也是参数的一种,也可以传给子组件,达到子组件控制父组件的目的
import React from 'react';
import ReactDOM from 'react-dom';
function Son(props) {
return
}
function Father(props) {
return (
);
}
ReactDOM.render(
2.事件处理函数传参
import React from 'react';
import ReactDOM from 'react-dom';
function Father(props) {
function getName(e) {
console.log(`传递参数的值是${e}`);
}
return ();
}
ReactDOM.render(
3.路由传参
函数组件,可以使用hook
import React from 'react';
import ReactDOM from 'react-dom';
import {
BrowserRouter as Router,
Switch,
Route,
Link,
useParams
} from "react-router-dom";
export default function ParamsExample() {
return (
Yahoo321
Yahoo123
);
}
function Child(props) {
let {
id
} = useParams();
return (
ID: {id}
);
}
ReactDOM.render(
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