* Calculator.js import React from 'react' class Calculator extends React.Component { constructor(props) { super(props); this.handleCelsiusChange = this.handleCelsiusChange.bind(this); this.handleFahrenheitChange = this.handleFahrenheitChange.bind(this); this.state = {temperature: '', scale: 'c'...
它呈现一个让你输入温度,并保持其价值this.state.temperature。 此外,它呈现BoilingVerdict当前输入值。 代码语言:javascript 复制 class Calculator extends React.Component { constructor(props) { super(props); this.handleChange = this.handleChange.bind(this); this.state = {temperature: ''}; } handleChang...
In React, sharing state is accomplished by moving it up to the closest common ancestor of the components that need it. This is called "lifting state up". 这是处理简单的共享状态的一种方式。 当我们把需要共享的状态放到父组件之后。我们就不能在子组件内通过setState方法改变它了,只能在父组件内用s...
As mentioned, React enforces a unidirectional data flow from parent to child. Therefore, the CounterButton component cannot directly share the count state value with the Home component. To get around this, you need to lift the state up. How to Lift State Up to Share Data Between Components ...
The low-temperature, high-density, and oxygen-rich surface water would be continuously transferred to the lower layer, forming a continuous mixing process in the natural state. Thus, good water quality could also be maintained after the WLA stopped running. The operation of WLA could effectively ...