在文档的QUICK START的提到Lifting State Up(状态提升),并不是什么新鲜东西。只是把几个组件需要共享的状态拿出来放到最近的父组件而已。然后通过传参的方式注入子组件,成为其props。由于子组件获取的状态state_inShare都来自父组件,因此各自的state_inShare是同步的。 In React, sharing state is accomplished by movin...
Lifting State Up 通常,几个组件需要反映相同的变化数据。我们建议将共享状态提升至最接近的共同祖先。让我们看看这是如何运作的。 在本节中,我们将创建一个温度计算器,用于计算在给定温度下水是否沸腾。 我们将从一个叫做组件开始BoilingVerdict。它接受celsius温度作为支柱,并打印是否足够煮沸水: 代码语言:javascript ...
handleCelsiusChange(temperature) { this.setState({scale: 'c', temperature}) } handleFahrenheitChange(temperature) { this.setState({scale: 'f', temperature}) } render() { // props are read-only. const scale = this.state.scale; const temperature = this.state.temperature; const celsius = s...
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ROBOT, ITS FACIAL EXPRESSION METHOD AND DETECTING METHOD FOR STEP DIFFERENCE AND LIFTING-UP STATEPROBLEM TO BE SOLVED: To enable a quick motion by a real time data control using a serial bus to an interface between inside components.;SOLUTION: This robot comprises: an I/F board 4 which ...
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To get around this, you need to lift the state up. How to Lift State Up to Share Data Between Components Lifting state refers to moving a component’s state higher up the component tree, to a parent component. Once you lift the state, you can pass it down to child components as prop...