Reserve a spot for a credit card in 4-digit format with VueJS

Question

Reserve a spot for a credit card in 4-digit format with VueJS

When I enter a credit card number, I want to automatically insert a space after every 4 digits. For example: 0000 0000 0000 0000 I am currently using vue js and have come across examples using jquery, but I prefer not to use jquery.

Any help would be appreciated

<!--template -->
<div>
  <div>
    <p>Card Number</p>
    <input class="cardNumber" type="tel" name="cardNumber" placeholder="Enter your card number " maxlength="19" pattern="\d*"><i class="fas fa-credit-card"></i>
  </div>
  <div>
    <p>Expiration Date</p>
    <input type="tel" name="expiration" pattern="\d*" maxlength="7" placeholder="MM / YY">
  </div>
  <div>
    <p>CVV</p>
    <input type="tel" name="cvv" pattern="\d*" maxlength="4" placeholder="CVV">
  </div>
</div>
<!-- /template -->

javascript vue.js vuejs3

Answer 1

Answer №1

Vue2 has a feature called filters specifically designed for this purpose.

const app = new Vue({
  el: '#app',
  data(){
    return {
      cardNumber: '' 
    } 
  },
  filters: {
    formatCardNumber(value){
      return value ? value.match(/.{1,4}/g).join(' ') : '';
    } 
  },
  methods: {
    updateValue(e){
       this.cardNumber = e.target.value.replace(/ /g,'');
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<main id="app">
  <input :value="cardNumber | formatCardNumber" @input="updateValue"/>
</main>

In Vue3, the use of computed is recommended as a replacement for filters. Filters have been removed from Vue 3.0 and are no longer supported.

Vue.createApp({
      data(){
        return {
          cardNumber: '' 
        } 
      },
      computed: {
        formatCardNumber(){
          return this.cardNumber ? this.cardNumber.match(/.{1,4}/g).join(' ') : '';
        } 
      },
      methods: {
        updateValue(e){
           this.cardNumber = e.target.value.replace(/ /g,'');
        }
      }
    }).mount('#app')

<script src="https://unpkg.com/vue@next"></script>
<main id="app">
  <input :value="formatCardNumber" @input="updateValue"/>
</main>

Answer 2

Vue2 has a feature called filters specifically designed for this purpose.

const app = new Vue({
  el: '#app',
  data(){
    return {
      cardNumber: '' 
    } 
  },
  filters: {
    formatCardNumber(value){
      return value ? value.match(/.{1,4}/g).join(' ') : '';
    } 
  },
  methods: {
    updateValue(e){
       this.cardNumber = e.target.value.replace(/ /g,'');
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<main id="app">
  <input :value="cardNumber | formatCardNumber" @input="updateValue"/>
</main>

In Vue3, the use of computed is recommended as a replacement for filters. Filters have been removed from Vue 3.0 and are no longer supported.

Vue.createApp({
      data(){
        return {
          cardNumber: '' 
        } 
      },
      computed: {
        formatCardNumber(){
          return this.cardNumber ? this.cardNumber.match(/.{1,4}/g).join(' ') : '';
        } 
      },
      methods: {
        updateValue(e){
           this.cardNumber = e.target.value.replace(/ /g,'');
        }
      }
    }).mount('#app')

<script src="https://unpkg.com/vue@next"></script>
<main id="app">
  <input :value="formatCardNumber" @input="updateValue"/>
</main>

Answer 3

Answer №2

In my opinion, the most convenient way to apply a pattern to input in Vuejs is by utilizing the vue-the-mask library.

For instance, here's how you can use this approach for a bank account pattern:

...

<div>
 <label>Bank Account</label>
 <the-mask
  v-model="bankAccount"
  :mask="['###-#', '####-#', '#####-#', '######-#']"
 />
</div>

...

Answer 4

In my opinion, the most convenient way to apply a pattern to input in Vuejs is by utilizing the vue-the-mask library.

For instance, here's how you can use this approach for a bank account pattern:

...

<div>
 <label>Bank Account</label>
 <the-mask
  v-model="bankAccount"
  :mask="['###-#', '####-#', '#####-#', '######-#']"
 />
</div>

...

Answer 5

Answer №3

Your card input seems to be linked to a data object:

data() {
  return {
    cardNumber: ''
  }
}

Within the template using v-model, you can include an event listener for keyup:

<input v-model="cardNumber" @keyup="formatCardNumber" class="creditCardNumber" type="tel" name="creditCardNumber" placeholder="Enter your credit card number " maxlength="19" pattern="\d*"><i class="fas fa-credit-card"></i>

Create a method like this:

methods: {
  formatCardNumber() {
    let num = this.cardNumber;
    (num.length - (num.split(" ").length - 1)) % 4 === 0 ? this.cardNumber += ' ' : '';
  }
}

In this method, with each keyup event, it checks if the length of the text entered in the credit card input (excluding spaces) is divisible by 4.

Answer 6

Your card input seems to be linked to a data object:

data() {
  return {
    cardNumber: ''
  }
}

Within the template using v-model, you can include an event listener for keyup:

<input v-model="cardNumber" @keyup="formatCardNumber" class="creditCardNumber" type="tel" name="creditCardNumber" placeholder="Enter your credit card number " maxlength="19" pattern="\d*"><i class="fas fa-credit-card"></i>

Create a method like this:

methods: {
  formatCardNumber() {
    let num = this.cardNumber;
    (num.length - (num.split(" ").length - 1)) % 4 === 0 ? this.cardNumber += ' ' : '';
  }
}

In this method, with each keyup event, it checks if the length of the text entered in the credit card input (excluding spaces) is divisible by 4.

Answer 7

Answer №4

 const application = new Vue({
       el: '#application',
         data(){
          return {
           cardNumber: '' 
           } 
          },
        filters: {
           formatCard(value){
               return value ? (value.replace(/ /g, '')).match(/.{1,4}/g).join(' ') : '';
           } 
         },
         methods: {
          isNumeric(evt) {
            evt = (evt) ? evt : window.event;
            var charCode = (evt.which) ? evt.which : evt.keyCode;
            if ((charCode > 31 && (charCode < 48 || charCode > 57)) && charCode !== 46) {
                evt.preventDefault();
            } else {
                return true;
            }
        },
            updateInput(e){
               if (e.target.value.trim() != "") {
                   this.cardNumber = (e.target.value.replace(/ /g, '')).match(/.{1,4}/g).join(' ')
                } else {
                   this.cardNumber = ""
                }
            }
         }
         })

#application {
display: flex;
    flex-direction: column;
}
#application label{ 
height: 20px;
        font-size:15px;
        color:green;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"> 
</script>
<main id="application">
<label>{{cardNumber}}</label>
         <input placeholder="Enter Card Number" :value="cardNumber | formatCard" @input="updateInput" @keypress="isNumeric($event)"/>
      </main>

Answer 8

 const application = new Vue({
       el: '#application',
         data(){
          return {
           cardNumber: '' 
           } 
          },
        filters: {
           formatCard(value){
               return value ? (value.replace(/ /g, '')).match(/.{1,4}/g).join(' ') : '';
           } 
         },
         methods: {
          isNumeric(evt) {
            evt = (evt) ? evt : window.event;
            var charCode = (evt.which) ? evt.which : evt.keyCode;
            if ((charCode > 31 && (charCode < 48 || charCode > 57)) && charCode !== 46) {
                evt.preventDefault();
            } else {
                return true;
            }
        },
            updateInput(e){
               if (e.target.value.trim() != "") {
                   this.cardNumber = (e.target.value.replace(/ /g, '')).match(/.{1,4}/g).join(' ')
                } else {
                   this.cardNumber = ""
                }
            }
         }
         })

#application {
display: flex;
    flex-direction: column;
}
#application label{ 
height: 20px;
        font-size:15px;
        color:green;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"> 
</script>
<main id="application">
<label>{{cardNumber}}</label>
         <input placeholder="Enter Card Number" :value="cardNumber | formatCard" @input="updateInput" @keypress="isNumeric($event)"/>
      </main>

Reserve a spot for a credit card in 4-digit format with VueJS

Answer №1

Answer №2

Answer №3

Answer №4

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Reserve a spot for a credit card in 4-digit format with VueJS

Answer №1

Answer №2

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Answer №4

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