How to clear the verification prompt in vue-Front-end Q&A-php.cn

In Vue.js, we use the form validation plug-in to capture form validation errors. However, there are situations where we need to clear form validation errors. This article will discuss how to clear form validation prompts through Vue.js code.

Understanding Vue.js form validation

Vue.js form validation relies on two key factors: form model and validation rules. The form model is an object that saves and controls form data, while validation rules are one or more rules defined on the form to ensure the integrity and correctness of the form data.

In Vue.js, we use theVuelidateform validation library to define form validation rules. For example, we can define a rule to ensure that the input field is not empty:

validations: { name: { required: validators.required, }, }

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This rule will check if thenamefield is empty and display an error message if it is empty. By default, the error message will automatically appear below the form field.

Clear form validation prompt

Now, let’s say we need to clear that error message so that the user can start entering data again. To clear the message, we need to access the form control's validation status and mark it as "unvalidated".

In Vue.js, we can use the following steps to clear the form validation prompt:

Access the form model throughthis.$vThe verification object obtains all verification status of the form.
```
const validationState = this.$v;
```
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Use thesetPropagationmethod to determine whether the validation should be passed to the child component. Here we want to disable "deep validation" so that only the validation status of the current form control is cleared.
```
validationState.$touch(); validationState.$setDirty(); validationState.$setChildrenDirty(true);
```
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Set the verification status to "Unverified" status.
```
validationState.name.$touch();
```
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We can remove the error message from the form control if needed.
```
validationState.$reset();
```
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The complete code is as follows:

methods: { clearValidation() { const validationState = this.$v; validationState.$touch(); validationState.$setDirty(); validationState.$setChildrenDirty(true); validationState.name.$touch(); validationState.$reset(); }, },

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When you need to clear form validation errors, just call theclearValidationmethod.

Conclusion

In Vue.js, we can use theVuelidateplug-in to implement form validation. However, sometimes we need to clear the form validation prompt so the user can start entering data again. We can easily clear form validation errors by accessing the validation status of a form control and marking it as "unvalidated".

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