我想独立于用户交互动态打开/关闭折叠元素(通过搜索结果显示特定面板)。
Collapse React 组件具有 setActiveKey(并在用户点击时使用它)但它不会暴露给 Collapse Node 引用。
有没有以一种不会触发重新渲染的方式打开或关闭?
我尝试使用 state 和 props,但这总是会重新渲染嵌套 Collapse 组件的完整树,在我的例子中这需要超过 3 秒的时间。
由于嵌套了许多相互依赖的组件,因此在此发布完整代码会过多。然而,基本结构在这里可见:https://codesandbox.io/s/nk64q4xy8p
我想通过不同的用户交互打开特定面板。在选择或单击按钮的 onChange 中。
最佳答案
用状态变量做这件事没什么不好的。一旦状态或 Prop 发生变化,它将渲染整个组件以及下一个组件。
但如果由于重新渲染而出现任何性能问题,您可能应该查看 pure components 并使用react lifecycle methods 以提高性能(或避免重新渲染)。
此外,还可以使用Antd的Collapse destroyInactivePanel的特殊 Prop ,它会销毁(卸载)不活动的面板。
供您引用的代码 ( https://codesandbox.io/s/y30z35p1vv?fontsize=14 )
import React from "react";
import ReactDOM from "react-dom";
import "antd/dist/antd.css";
import "./index.css";
import { Collapse, Button, Select } from "antd";
const Panel = Collapse.Panel;
const text = `
A dog is a type of domesticated animal.
Known for its loyalty and faithfulness,
it can be found as a welcome guest in many households across the world.
`;
class AvoidRenders extends React.Component {
state = {
openPanel: "1"
};
onChange = key => {
this.setState({
openPanel: key
});
};
render = () => {
return (
<div>
<Select
dropdownMatchSelectWidth={false}
defaultValue="1"
onChange={this.onChange}
>
<Select.Option key="1" value="1">
Panel 1
</Select.Option>
<Select.Option key="2" value="2">
Panel 2
</Select.Option>
<Select.Option key="3" value="3">
Panel 3
</Select.Option>
</Select>
<Collapse activeKey={this.state.openPanel} destroyInactivePanel={true}>
<Panel header="This is panel header 1" key="1">
<Text1 />
</Panel>
<Panel header="This is panel header 2" key="2">
<Text2 />
</Panel>
<Panel header="This is panel header 3" key="3">
<Text3 />
</Panel>
</Collapse>
</div>
);
};
}
class Text1 extends React.PureComponent {
componentWillUnmount = () => {
console.log("Destroyed 1");
};
componentWillUpdate = () => {
console.log("Updated 1");
};
render = () => (
<p>
{console.log("Rendered 1")}
{text}
</p>
);
}
class Text2 extends React.PureComponent {
componentWillUnmount = () => {
console.log("Destroyed 2");
};
componentWillUpdate = () => {
console.log("Updated 2");
};
render = () => (
<p>
{console.log("Rendered 2")}
{text}
</p>
);
}
class Text3 extends React.PureComponent {
componentWillUnmount = () => {
console.log("Destroyed 3");
};
componentWillUpdate = () => {
console.log("Updated 3");
};
render = () => (
<p>
{console.log("Rendered 3")}
{text}
</p>
);
}
ReactDOM.render(<AvoidRenders />, document.getElementById("container"));
我希望这会有所帮助。
关于javascript - 动态打开和关闭 antd/react 折叠组件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55649308/