React Stateful Class 组件：使用“this.setState”更新 state 的属性，不起作用。 没有错误。 State 不变

Question

I know there are several questions covering this, but they didn't help me. I basically have this:

state: {
  location: 'Tahiti',
  price: ['2000'],
  day: {August}
  
}

componentDidMount() {
    const updatedprice = '1800'
    this.setState({price: updatedprice})
}

I've done more or less the same for the other properties, except for price where I tried to set an object as the new state. This has always worked for me, and is working elsewhere. What is going wrong? Any pointers?

All of the component is basically this. I just wanted to play with modifying the state.

PS I did a console.log on when I'm setting the state: this.setState({price: updatedprice}), and it gives undefined, this happens with other properties too. Although, I have no errors, it's simply that when I console.log the state, it shows zero difference.

Answer 1

You just have the syntax wrong.

this.setState({price: updatedprice});