1.5 KiB
1.5 KiB
title |
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Set State with this.setState |
Set State with this.setState
Hint 1:
class MyComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
name: 'Initial State'
};
this.handleClick = this.handleClick.bind(this);
}
handleClick() {
// change code below this line
// Update the state data by using "this.setState()" method.
// You can look to the sample inside the description for calling "setState()" method.
// change code above this line
}
render() {
return (
<div>
<button onClick={this.handleClick}>Click Me</button>
<h1>{this.state.name}</h1>
</div>
);
}
};
Solution
class MyComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
name: 'Initial State'
};
this.handleClick = this.handleClick.bind(this);
}
handleClick() {
// change code below this line
this.setState({
name: 'React Rocks!'
});
// change code above this line
}
render() {
return (
<div>
<button onClick={this.handleClick}>Click Me</button>
<h1>{this.state.name}</h1>
</div>
);
}
};
Code Explanation:
when users click the button the "handleClick()" method will be called and inside this method the data of the constuctor`s state will be updated by "setState()" method. then h1 tag will be changed with the new data of the constructor`s state.