What are the classes for verifying prompt status in bootstrap?

When making a form, form verification is inevitable. It is also necessary to provide validation status styles, and these effects are also provided in the Bootstrap framework.

1. .has-warning: warning status (yellow) (recommended learning: Bootstrap video tutorial)

2. .has-error: error status (red)

3. .has-success: success status (green)

When using it, you only need to add the corresponding status class name to the form-group container.

  成功状态   

  警告状态   

  错误状态   

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