0a1eeea424
* fix: replace sh with shell fix replace terminal with shell fix replace node with js fix replace output with shell fix replace cs with csharp fix replace c++ with cpp fix replace c# with csharp fix replace javasctipt with js fix replace syntax with js fix replace unix with shell fix replace linux with shell fix replace java 8 with java fix replace swift4 with swift fix replace react.js with jsx fix replace javascriot with js fix replace javacsript with js fix replace c++ - with cpp fix: corrected various typos fix: replace Algorithm with nothing fix: replace xaml with xml fix: replace solidity with nothing fix: replace c++ with cpp fix: replace txt with shell fix: replace code with json and css fix: replace console with shell
37 lines
890 B
Markdown
37 lines
890 B
Markdown
---
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title: Render with an If/Else Condition
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localeTitle: 使用If / Else条件渲染
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---
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## 使用If / Else条件渲染
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### 方法
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在组件的render方法内部，编写if / else语句，每个语句都有自己的返回方法，该方法具有不同的JSX。这使程序员能够根据各种条件呈现不同的UI。
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首先，将当前返回方法包装在if语句中，并设置条件以检查变量'display'是否为true。请记住，您使用`this.state`访问状态。
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### 解
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```jsx
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if (this.state.display === true) {
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return (
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<div>
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<button onClick={this.toggleDisplay}>Toggle Display</button>
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<h1>Displayed!</h1>
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</div>
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);
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}
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```
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接下来，创建一个else语句，返回**不带** `h1`元素的相同JSX。
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```jsx
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else {
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return (
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<div>
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<button onClick={this.toggleDisplay}>Toggle Display</button>
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</div>
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)
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}
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``` |