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React implements the method of changing the style when clicking: 1. Through the callback function in setState to realize the function performed when clicking to switch the state; 2. Through "
The operating environment of this tutorial: Windows 10 system, react18.0.0 version, Dell G3 computer.
How to change the style on click in react?
React click/hover to modify the CSS style
(1) Click to modify the style
Method 1: (typescript writing method)
type state = { selected: boolean; }; class Measurement extends Component<{}, state> { constructor(props:any) { super(props); this.state = { selected: false }; } handleClick = (e:any) => { this.setState({ selected: !this.state.selected }, () => { if(!this.state.selected){ this.clearAll(); } }); } private rightBtnStyle: CSSProperties = { background:"url(/assets/images/3.png) no-repeat center", border: "none", color: "white" }; private rightBtnStyle2: CSSProperties = { background:"url(/assets/images/1.png) no-repeat center", border: "none", color: "white" }; //省略具体功能 render() { var currentstyle; if(this.state.selected){ currentstyle=this.rightBtnStyle2; } else{ currentstyle=this.rightBtnStyle; } return( <div className="tool-widget"> <Popover placement="left" content={this.content} trigger="click"> <Button className="right-btn" style={currentstyle} onClick={this.handleClick.bind(this)}></Button> </Popover> </div> ); } };
PS: The function performed when clicking here to switch states can be implemented through the callback function in setState.
Method 2: (Dynamicly add className)
The above render is replaced with the following
render() { return ( <div className="tool-widget" id="Measurement"> <Popover placement="left" content={this.content} trigger="click"> <Button className={["right-btn", this.state.selected ? "active":null].join(' ')} onClick={this.handleClick.bind(this)}></Button> </Popover> </div> ); }
The corresponding css file is added:
#Measurement { .right-btn{ background:url(./images/3.png) no-repeat center; border:none; color: white; width:100%; height: 100% } .right-btn.active{ background:url(./images/1.png) no-repeat center; } }
Recommended learning:《react video tutorial》
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