vue 3 form validation examples with explanation

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vue 3 form validation tutorial

form validation is an essential part of web development to ensure that the data submitted by users is accurate and meets certain criteria. in this tutorial, we will explore how to implement form validation in a vue 3 application using the composition api and the `ref` and `computed` properties for managing form state and validation logic.

setting up your vue 3 project

first, make sure you have vue cli installed. if you haven't installed it yet, run:

```bash
npm install -g @vue/cli
```

create a new vue 3 project:

```bash
vue create vue-form-validation
cd vue-form-validation
```

choose the default preset (vue 3) and install the dependencies.

creating a simple form

for this example, we will create a simple user registration form with the following fields:

name
email
password

we will validate the following criteria:

name: required, minimum length of 3 characters.
email: required, valid email format.
password: required, minimum length of 6 characters.

example code

1. **create a new component**: create a new file called `registrationform.vue` in the `src/components` directory.

```vue
template
div
h2user registration/h2
form @submit.prevent="handlesubmit"
div
label for="name"name:/label
input type="text" v-model="form.name" id="name" /
span v-if="errors.name"{{ errors.name }}/span
/div

div
label for="email"email:/label
input type="email" v-model="form.email" id="email" /
span v-if="errors.email"{{ errors.email }}/span
/div

div
label for="password"password:/label
input type="password" v-model="form.password" id="password" /
span v-if="errors.password"{{ errors.password }}/span
/div

button type="submit"register/button
/form
/div
/template

script
import { ref, computed } from 'vue';

export default {
setup() {
cons ...

#Vue3 #FormValidation #windows
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