我已经设置了沙箱来展示如何做到这一点.

I've set up a sandbox to showcase how you can do this.

1. 布尔值设置为false
的初始化状态
2. 基于此布尔值有条件地渲染组件；因此最初该组件现在将显示在DOM上
3. 在执行某些操作(onClick)时，将setState放在布尔值上以true
4. 状态更改后，组件将重新呈现，现在将显示隐藏的组件(因为布尔值已设置为true)

1. Initialise state with a boolean set to false
2. Render the component conditionally based on this boolean; so initially the component will now show up on the DOM
3. On some action (onClick), setState on the boolean to true
4. The component will re-render since the state changed and will now show the hidden component (since the boolean has been set to true)