[英]ReactJS need to call function from outside class component
I have some various third party code in which I need to be able to call function from outside我有一些不同的第三方代码,我需要能够从外部调用 function
//**Import**
import React from 'react'
// .... etc..
//**function I need to have call the function inside react component**
function showDescription(element) {
// NEED to call function inside component class
this.
}
//**Class Component is here and notice state is set, and onClick had bind**
class SectionE extends React.Component {
constructor(props){
super(props);
this.state = {
visible: false // setting to true will display the modal dialog box
}
this.onClick = this.onClick.bind(this);
}
//**This is the What I want to call from outside!**
onClick() {
this.setState({visible: true}); // show modal dialog
}
//**Mount, calling in here works fine**
componentDidMount() {
//this works as another test
// this.onClick();
}
render()
{
return(
//**Testing calling is works fine (Inside )**
// manually show dialog this works
<button type="button" icon="pi pi-external-link" onClick={this.onClick} className="btn btn-primary" id="btnImportant">Add Important People</button>
//**3rd party primereact modal dialog**
<Dialog id="modal" header="Important People for ...." visible={this.state.visible} style={{width: '75vw'}} footer={footer} onHide={this.onHide} maximizable>
<ImportantFamily/>
</Dialog>
)
}
}
export default SectionE;
So it is not a child component or parent that i'm trying to call from, but code outside of the class component.所以它不是我试图调用的子组件或父组件,而是 class 组件之外的代码。 Thus I don't see how Ref
will even work.因此,我看不到Ref
甚至会如何工作。
There is a lot more code with SurveyJS 3rd party code that i have outside of react component is biggest reason this code is functions outside.我在 React 组件之外拥有的 SurveyJS 3rd 方代码还有更多代码,这是该代码在外部起作用的最大原因。
What are my options?我有哪些选择?
I think your best option would be to add a prop to your SectionE
component and then listen to updates on that prop eg where you are adding SectionE
add a prop called "visible" where you can set that visible variable from outside the SectionE class:我认为您最好的选择是向您的SectionE
组件添加一个道具,然后收听该道具的更新,例如在您添加SectionE
的位置添加一个名为“可见”的道具,您可以在其中从 SectionE class 外部设置该可见变量:
<SectionE visible={visible} />
Then do something inside your SectionE when it changes:然后在 SectionE 发生变化时做一些事情:
// this is inside your SectionE class:
componentDidUpdate(prevProps) {
if (prevProps.visible !== this.props.visible) {
this.setState({visible: this.props.visible}); // show/hide modal dialog
}
}
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