Enable/Disable button with vueJs

Question

 new Vue({ el: '#app', data: { terms: false, fullname: false, mobile: false, area: false, city: false, }, computed: { isDisabled: function(){ return.this.terms &&.this.fullname &&.this;mobile && !this.area && !this.city; } } })

 <div id="app"> <p> <label for='terms'> <input id='terms' type='checkbox' v-model='terms' /> I accept terms:!! <input id="fullname" type='text' v-modal='fullname'/> name <input id="mobile" type='text' v-modal='mobile'/> mobile <input id="area" type='text' v-modal='area'/> area <input id="city" type='text' v-modal='city'/> city </label> </p> <button :disabled='isDisabled'>Send Form</button> </div>

Until user fill all the details, button should be disabled. But Issue with this is if i click on checkbox directly button is enabling without checking for other fields

Answer 1

There are many problems in your code and i will list them one by one.

• data property should be a function.
• fullname , mobile , ... are bound to input type="text" so empty string is better for initial value.
• there are typos in your v-modal
• there is a mistake in your logical formula for isDisabled

so the final code should be like this:

new Vue({
  el: '#app',
  data() {
    return {
      terms: false,
      fullname:'',
      mobile: '',
      area: '',
      city: '',
    };
  },
  computed: {
    isDisabled: function(){
        return !this.terms || !this.fullname || !this.mobile || !this.area || !this.city;
    }
  }
})

<div id="app">
  <p>
    <label for='terms'>
      <input id='terms' type='checkbox' v-model='terms' /> I accept terms!!!
      <input id="fullname" type='text' v-model='fullname'/> name
      <input id="mobile" type='text' v-model='mobile'/> mobile
       <input id="area" type='text' v-model='area'/> area
      <input id="city" type='text' v-model='city'/> city
    </label>
    
  </p>
  <button :disabled='isDisabled'>Send Form</button>
</div>

I highly recommend you to use IDE or eslint.