如果你有2个不同的依赖关系，你也可以在条件操作符中使用条件(三元)操作符。

{
(launch_success)
  ?
  <span className="bg-green-100">
    Success
  </span>
  :
  (upcoming)
    ?
    <span className="bg-teal-100">
      Upcoming
    </span>
    :
    <span className="bg-red-100">
      Failed
    </span>
}

你可以引入一个单独的方法来返回div元素并在return中调用它。我使用这种情况的例子，错误呈现取决于状态，如:

const renderError = () => {
    if (condition)
        return ....;
    else if (condition)
        return ....;
    else if (condition)
        return ....;
    else
        return ....;
}

render(){
   return (
     <div>
      ....
      {renderError()}
     </div>
   );
}

你可以使用if, else这样的条件语句来呈现任何东西:

 render() {
    const price = this.state.price;
    let comp;

    if (price) {

      comp = <h1>Block for getting started with {this.state.price}</h1>

    } else {

      comp = <h1>Block for getting started.</h1>

    }

    return (
      <div>
        <div className="gettingStart">
          {comp}
        </div>
      </div>
    );
  }

如果你有2个不同的依赖关系，你也可以在条件操作符中使用条件(三元)操作符。

{
(launch_success)
  ?
  <span className="bg-green-100">
    Success
  </span>
  :
  (upcoming)
    ?
    <span className="bg-teal-100">
      Upcoming
    </span>
    :
    <span className="bg-red-100">
      Failed
    </span>
}

你也可以写If语句组件。这是我在我的项目中使用的。

组件/ IfStatement.tsx

import React from 'react'

const defaultProps = {
    condition: undefined,
}

interface IfProps {
    children: React.ReactNode
    condition: any
}

interface StaticComponents {
    Then: React.FC<{ children: any }>
    Else: React.FC<{ children: any }>
}

export function If({ children, condition }: IfProps): any & StaticComponents {
    if (React.Children.count(children) === 1) {
        return condition ? children : null
    }

    return React.Children.map(children as any, (element: React.ReactElement) => {
        const { type: Component }: any = element

        if (condition) {
            if (Component.type === 'then') {
                return element
            }
        } else if (Component.type === 'else') {
            return element
        }

        return null
    })
}

If.defaultProps = defaultProps

export function Then({ children }: { children: any }) {
    return children
}

Then.type = 'then'

export function Else({ children }: { children: any }) {
    return children
}

Else.type = 'else'

If.Then = Then as React.FC<{ children: any }>
If.Else = Else as React.FC<{ children: any }>

export default If

使用的例子:

<If condition={true}>
   <If.Then>
        <div>TRUE</div>
   </If.Then>
   <If.Else>
        <div>NOT TRUE</div>
   </If.Else>
</If>

如果你需要不止一个条件，那么你可以试试这个

https://www.npmjs.com/package/react-if-elseif-else-render

import { If, Then, ElseIf, Else } from 'react-if-elseif-else-render';

class Example extends Component {

  render() {
    var i = 3; // it will render '<p>Else</p>'
    return (
      <If condition={i == 1}>
        <Then>
          <p>Then: 1</p>
        </Then>
        <ElseIf condition={i == 2}>
          <p>ElseIf: 2</p>
        </ElseIf>
        <Else>
          <p>Else</p>
        </Else>
      </If>
    );
  }
}