7.37. Bootstrap5 form validation

发布时间 ： 2025-10-25 13:35:28 UTC      

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We can use different validation classes to set up the validation function of the form.

.was-validated or .needs-validation add to

element, the input input field will have a green (valid) or red (invalid) border effect to indicate whether the form requires input.

.valid-feedback or .invalid-feedback class is used to tell the user what information is missing or what needs to be done before submitting the form.

7.37.1. Example

Use .was-validated class displays what the form needs to fill in beforeit is submitted:


  

    
    
    
Verification successful！

    
Please enter your username!

  

  

    
    
    
Verification successful!

    
Please enter password!

7.37.2. Example

Use .needs-validation which validates the missing content after the form is submitted You need to add some JavaScript code here to make the codework:


  

    
    
    
Verification successful！

    
enter one user name！

  

  

    
    
    
Verification successful！

    
Please enter password！
文章链接 ： 7.37. Bootstrap5 form validation

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