How can I implement custom validation in Vue authentication forms?

How can I implement custom validation in Vue authentication forms?

You can create custom validation in Vue by using computed properties or methods to validate your form inputs. Would you like a code example?

Yes, please provide a code example for a login form.

Sure! Here's a simple example:

<template>
  <form @submit.prevent="validateForm">
    <input v-model="email" type="email" placeholder="Email" />
    <span v-if="emailError">{{ emailError }}</span>
    <input v-model="password" type="password" placeholder="Password" />
    <span v-if="passwordError">{{ passwordError }}</span>
    <button type="submit">Login</button>
  </form>
</template>

<script>
export default {
  data() {
    return {
      email: '',
      password: '',
      emailError: '',
      passwordError: '',
    };
  },
  methods: {
    validateForm() {
      this.emailError = this.validateEmail(this.email);
      this.passwordError = this.validatePassword(this.password);
      if (!this.emailError && !this.passwordError) {
        // Proceed with login
      }
    },
    validateEmail(email) {
      const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
      return regex.test(email) ? '' : 'Invalid email address';
    },
    validatePassword(password) {
      return password.length >= 6 ? '' : 'Password must be at least 6 characters';
    },
  },
};

This code validates the email format and checks the password length.

That looks great! How can I add more fields with validation?

You can simply add more data properties for the new fields and create corresponding validation methods. Would you like to see an example?