How to see fields in validate in vue

In Vue.js, you can view validated fields by following these steps: Get the component reference and call the validate() method, returning true or false. Get error messages through the errors array, containing one or more error messages generated by validation rules. Depending on the validation result (pass/fail) decide whether to enable the submit button and continue the form flow, or display an error message and block the form flow.

How to view validated fields in Vue

In Vue.js, use validate Method can validate the fields in the form. In order to view the validated fields, you can use the following steps:

1. Get the validation status

Use the $refs API to get the reference of the component, Then call the $refs.componentName.validate() method. This will return a boolean value indicating whether the field passed validation:

<code class="js">const isValid = this.$refs.myFieldName.validate();</code>

2. View the error message

If the field did not pass validation, you can pass errors Array to view error messages:

<code class="js">const errors = this.$refs.myFieldName.errors;</code>

errors Array containing one or more error messages generated by validation rules.

3. Process the verification results

You can decide how to process the fields based on the verification results:

• Pass verification:Enable the submit button or continue the form flow.
• Failed validation: Display an error message and disable the submit button or block the form flow.

Example

The following example shows how to use the validate method and the errors array:

<code class="html"><template>
  <form>
    <div>
      <label for="name">姓名：</label>
      <input id="name" v-model="name" v-validate="'required'">
    </div>
    <div>
      <label for="email">电子邮件：</label>
      <input id="email" v-model="email" v-validate="'required|email'">
    </div>
    <button type="submit" @click.prevent="onSubmit">提交</button>
  </form>
</template>

<script>
import { required, email } from 'vuelidate/lib/validators';
import { ValidationObserver } from 'vee-validate';

export default {
  components: { ValidationObserver },
  data() {
    return {
      name: '',
      email: '',
    };
  },
  methods: {
    onSubmit() {
      const isValid = this.$refs.myForm.validate();
      if (isValid) {
        // 表单有效，执行提交操作
      } else {
        // 表单无效，显示错误消息并禁用提交按钮
      }
    },
  },
};
</script></code>

In the above example, the name and email fields have been validated through the Vee-Validate library. When the user clicks the Submit button, the onSubmit method will be called, where:

• Calls validate() Method to validate all fields in the form.
• If the form passes validation (isValid is true), the submit operation is performed.
• Otherwise, an error message will be displayed and the submit button will be disabled.

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