The Vue component seems to be missing the definition of $v for Vuelidate

I've been struggling to resolve this issue. The error message I am encountering pertains to a Vue component that is utilizing the Vuelidate library for form validation. Do you have any insights on what might be causing this error?

Uncaught TypeError: Cannot read property '$v' of undefined




<script>
    import Vue from "vue";
    import Vuelidate from "vuelidate";
    import { required, minLength, email, sameAs } from "vuelidate/lib/validators";
    
    Vue.use(Vuelidate);
    
    const hasUpperCase = (value) =>
      value.match(/(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*\W)/);
    export default {
      validations: {
        form: {
          Email: {
            required: required,
            isEmail: email,
          },
          ConfirmEmail: {
            required: required,
            isEmail: email,
            match: sameAs(this.$v.form.Email),
          },
        },
      },
    };
    </script>

My Main.js

import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store";
import vuetify from "./plugins/vuetify";
import Vuelidate from "vuelidate";
Vue.use(Vuelidate);
Vue.config.productionTip = false;

new Vue({
  router,
  store,
  vuetify,
  validations:{},
  render: (h) => h(App)
}).$mount("#app");

Answer №1

To begin, start the installation process with this command: npm install vuelidate --save

My suggestion would be to declare it globally by importing it into your src/main.js file as shown below

import Vuelidate from 'vuelidate';
Vue.use(Vuelidate)

Once this is completed, import your validator classes into your component:

import { required, minLength, email, sameAs } from "vuelidate/lib/validators";

It's a good idea to define your data models before setting up your validation rules, like so:

data(){
  return {
   username:"",
   password:"",
 }
}

Now you can proceed to set up your validations

validations:{
  username::{
    required,alpha
  },

  password:{
    required,email
   }
}

Lastly, remember to include validations:{} in your main.js file.

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