javascript - (React.js)为什么状态没有立即改变？

Question

这个问题已经有答案了:

setState doesn't update the state immediately [duplicate] (15 个回答)

已关闭 6 年前。

我通过在 players 内放置一个对象来更改此处的状态。但似乎状态并没有立即改变？这是我在其他地方制造的功能还是错误？

console.log("Before(length):"+this.state.players.length);
players=players.filter(player => player.id !== id2);}
this.setState({players});
console.log("After(length):"+this.state.players.length);

结果是

Before(length):6
After(length):6

之后应该是 5？

Answer 1

Think of setState() as a request rather than an immediate command to update the component. For better perceived performance, React may delay it, and then update several components in a single pass.

https://facebook.github.io/react/docs/react-component.html#setstate