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Template Driven Form Validation In Vue.js ― Scotch

  • Create a new file called register.html and add: – head – meta charset=”utf-8″ – meta name=”viewport” titleVue Template Form include the Vue.js library — – script include the VeeValidate library — – script Notify vue about the VeeValidate plugin – code above shows how easy it is to include VeeValidate…
  • For example, we will use the required and the email validators: – input v-validate=”‘required|email'” type=”text” name=”email” – Alternatively you can pass an object for more flexibility: – input v-validate=”{ required: true, email: true, regex: /[0-9]+/ }” type=”text” name=”email” – Now every time the input changes, the validator will run the…
  • When a form validation fails, VeeValidate populates this errors variable with an array containing objects of failed validations, which can be accessed this way: – //check if an input has the first error of an to use this method, some things must be put into consideration.
  • So we can call the Validator for any input this way: – input v-validate=”‘checkuser'” type=”text” name=”username” – Validating A Simple Registration Page – Let us whip up a small demo.
  • /h5 – form id=”signup-form” div class=”form-group” – label for=”name” class=”cols-sm-2 control-label”Your Name/label – div class=”cols-sm-10″ – div class=”input-group” – span class=”input-group-addon”i class=”fa fa-user fa” aria-hidden=”true”/i/span – input type=”text” name=”name” placeholder=”Name” :class=”{ ‘form-control’: true, ‘is-danger’: errors.has(‘name’) }” v-model=”name” /div – span v-show=”errors.has(‘name’)” class=”help is-danger”{{ errors.first(‘name’) }}/span – /div – /div -…

Form validation (or more correctly, form field validation) forces a user to fill out all required fields in a web form. The validation is typically done where the developer can set up rules. For example: If the name field is blank, take the user back to the form and display an error message.

Form validation (or more correctly, form field validation) forces a user to fill out all required fields in a web form. The validation is typically done where the developer can set up rules. For example: If the name field is blank, take the user back to the form and display an error message.

Template driven validation is a type of form validation where validation rules are set directly in the form elements using directives.

To implement template driven validations in Vue.js, we can use VeeValidate. VeeValidate is a plugin for Vue.js that allows you to validate input fields and display errors.

What We Will build

At the end of this piece, we will build a simple registration form which uses VeeValidate to validate its form input. Here is a pictorial view of what we will build.

Getting Started With VeeValidate

First, we need to grab Vue and the VeeValidate library.

Let us grab the browser build for Vue.js which is available here.

Next, we will grab the browser build for VeeValidate which is available via jsdeliver here.

Create a new file called register.html and add:

head

meta charset=”utf-8″

meta name=”viewport” titleVue Template Form include the Vue.js library —

script include the VeeValidate library —

script Notify vue about the VeeValidate plugin

code above shows…

Template Driven Form Validation In Vue.js ― Scotch

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