Bootstrap provides custom feedback styles for HTML5 form validation. Add needs-validation to your form and .valid-feedback or .invalid-feedback to input wrappers.
Bootstrap Form Validation
Provide instant feedback on form submissions with .was-validated classes.
Key Takeaways: Bootstrap Form Validation
Mastering Bootstrap Form Validation helps you write clean and reliable Bootstrap code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
Bootstrap Form Validation Code Example
Bootstrap<form class="needs-validation was-validated">
<label for="uname" class="form-label">Username:</label>
<input type="text" class="form-control" id="uname" required value="codesin">
<div class="valid-feedback">Looks good!</div>
</form>Output
Displays green success outline and valid message
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