I have a dropdown as is shown in the following image:
When I click the folder icon it opens and closes because showingProjectSelector
property in the state that is set to false.
constructor (props) {
super(props)
const { organization, owner, ownerAvatar } = props
this.state = {
owner,
ownerAvatar,
showingProjectSelector: false
}
}
When I click the icon, it opens and closes properly.
<i
onClick={() => this.setState({ showingProjectSelector: !this.state.showingProjectSelector })}
className='fa fa-folder-open'>
</i>
But what I'm trying to do is to close the dropdown when I click outside it. How can I do this without using any library?
This is the entire component: https://jsbin.com/cunakejufa/edit?js,output
您可以尝试利用onBlur
:
<i onClick={...} onBlur={() => this.setState({showingProjectSelector: false})}/>
I faced same issue with you. Solved after reading this: Detect click outside React component Please try:
You should use a High Order Component to wrap the component that you would like to listen for clicks outside it.
This component example has only one prop: "onClickedOutside" that receives a function.
ClickedOutside.js
import React, { Component } from "react";
export default class ClickedOutside extends Component {
componentDidMount() {
document.addEventListener("mousedown", this.handleClickOutside);
}
componentWillUnmount() {
document.removeEventListener("mousedown", this.handleClickOutside);
}
handleClickOutside = event => {
// IF exists the Ref of the wrapped component AND his dom children doesnt have the clicked component
if (this.wrapperRef && !this.wrapperRef.contains(event.target)) {
// A props callback for the ClikedClickedOutside
this.props.onClickedOutside();
}
};
render() {
// In this piece of code I'm trying to get to the first not functional component
// Because it wouldn't work if use a functional component (like <Fade/> from react-reveal)
let firstNotFunctionalComponent = this.props.children;
while (typeof firstNotFunctionalComponent.type === "function") {
firstNotFunctionalComponent = firstNotFunctionalComponent.props.children;
}
// Here I'm cloning the element because I have to pass a new prop, the "reference"
const children = React.cloneElement(firstNotFunctionalComponent, {
ref: node => {
this.wrapperRef = node;
},
// Keeping all the old props with the new element
...firstNotFunctionalComponent.props
});
return <React.Fragment>{children}</React.Fragment>;
}
}
If you want to use a tiny component (466 Byte gzipped) that already exists for this functionality then you can check out this library react-outclick .
The good thing about the library is that it also lets you detect clicks outside of a component and inside of another. It also supports detecting other types of events.
Using the library you can have something like this inside your component.
import OnOutsiceClick from 'react-outclick';
class MyComp extends Component {
render() {
return (
<OnOutsiceClick
onOutsideClick={() => this.setState({showingProjectSelector: false})}>
<Dropdown />
</OnOutsiceClick>
);
}
}
Wrapper component - ie the one that wrapps all other components
create onClick event that runs a function handleClick.
handleClick function checks ID of the clicked event.
When ID matches it does something, otherwise it does something else.
const handleClick = (e) => {
if(e.target.id === 'selectTypeDropDown'){
setShowDropDown(true)
} else {
setShowDropDown(false);
}
}
So I have a dropdown menu that appears ONLY when you click on the dropdown menu, otherwise it hides it.
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