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HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Credit Card Animation | @coding.stella</title>
  <link rel="stylesheet" href="https://public.codepenassets.com/css/reset-2.0.min.css">
<link rel="stylesheet" href="./style.css">

</head>
<body>

<div class="wrapper" id="app">
    <div class="card-form">
      <div class="card-list">
        <div class="card-item" v-bind:class="{ '-active' : isCardFlipped }">
          <div class="card-item__side -front">
            <div class="card-item__focus" v-bind:class="{'-active' : focusElementStyle }" v-bind:style="focusElementStyle" ref="focusElement"></div>
            <div class="card-item__cover">
              <img
              v-bind:src="'./assets/images/' + currentCardBackground + '.jpeg'" class="card-item__bg">
            </div>
            
            <div class="card-item__wrapper">
              <div class="card-item__top">
                <img src="./assets/images/chip.png" class="card-item__chip">
                <div class="card-item__type">
                  <transition name="slide-fade-up">
                    <img v-bind:src="'./assets/images/' + getCardType + '.png'" v-if="getCardType" v-bind:key="getCardType" alt="" class="card-item__typeImg">
                  </transition>
                </div>
              </div>
              <label for="cardNumber" class="card-item__number" ref="cardNumber">
                <template v-if="getCardType === 'amex'">
                 <span v-for="(n, $index) in amexCardMask" :key="$index">
                  <transition name="slide-fade-up">
                    <div
                      class="card-item__numberItem"
                      v-if="$index > 4 && $index < 14 && cardNumber.length > $index && n.trim() !== ''"
                    >*</div>
                    <div class="card-item__numberItem"
                      :class="{ '-active' : n.trim() === '' }"
                      :key="$index" v-else-if="cardNumber.length > $index">
                      {{cardNumber[$index]}}
                    </div>
                    <div
                      class="card-item__numberItem"
                      :class="{ '-active' : n.trim() === '' }"
                      v-else
                      :key="$index + 1"
                    >{{n}}</div>
                  </transition>
                </span>
                </template>

<template v-else>
                  <span v-for="(n, $index) in otherCardMask" :key="$index">
                    <transition name="slide-fade-up">
                      <div
                        class="card-item__numberItem"
                        v-if="$index > 4 && $index < 15 && cardNumber.length > $index && n.trim() !== ''"
                      >*</div>
                      <div class="card-item__numberItem"
                        :class="{ '-active' : n.trim() === '' }"
                        :key="$index" v-else-if="cardNumber.length > $index">
                        {{cardNumber[$index]}}
                      </div>
                      <div
                        class="card-item__numberItem"
                        :class="{ '-active' : n.trim() === '' }"
                        v-else
                        :key="$index + 1"
                      >{{n}}</div>
                    </transition>
                  </span>
                </template>
              </label>
              <div class="card-item__content">
                <label for="cardName" class="card-item__info" ref="cardName">
                  <div class="card-item__holder">Card Holder</div>
                  <transition name="slide-fade-up">
                    <div class="card-item__name" v-if="cardName.length" key="1">
                      <transition-group name="slide-fade-right">
                        <span class="card-item__nameItem" v-for="(n, $index) in cardName.replace(/\s\s+/g, ' ')" v-if="$index === $index" v-bind:key="$index + 1">{{n}}</span>
                      </transition-group>
                    </div>
                    <div class="card-item__name" v-else key="2">Full Name</div>
                  </transition>
                </label>
                <div class="card-item__date" ref="cardDate">
                  <label for="cardMonth" class="card-item__dateTitle">Expires</label>
                  <label for="cardMonth" class="card-item__dateItem">
                    <transition name="slide-fade-up">
                      <span v-if="cardMonth" v-bind:key="cardMonth">{{cardMonth}}</span>
                      <span v-else key="2">MM</span>
                    </transition>
                  </label>
                  /
                  <label for="cardYear" class="card-item__dateItem">
                    <transition name="slide-fade-up">
                      <span v-if="cardYear" v-bind:key="cardYear">{{String(cardYear).slice(2,4)}}</span>
                      <span v-else key="2">YY</span>
                    </transition>
                  </label>
                </div>
              </div>
            </div>
          </div>
          <div class="card-item__side -back">
            <div class="card-item__cover">
              <img
              v-bind:src="'./assets/images/' + currentCardBackground + '.jpeg'" class="card-item__bg">
            </div>
            <div class="card-item__band"></div>
            <div class="card-item__cvv">
                <div class="card-item__cvvTitle">CVV</div>
                <div class="card-item__cvvBand">
                  <span v-for="(n, $index) in cardCvv" :key="$index">
                    *
                  </span>

</div>
                <div class="card-item__type">
                    <img v-bind:src="'./assets/images/' + getCardType + '.png'" v-if="getCardType" class="card-item__typeImg">
                </div>
            </div>
          </div>
        </div>
      </div>
      <div class="card-form__inner">
        <div class="card-input">
          <label for="cardNumber" class="card-input__label">Card Number</label>
          <input type="text" id="cardNumber" class="card-input__input" v-mask="generateCardNumberMask" v-model="cardNumber" v-on:focus="focusInput" v-on:blur="blurInput" data-ref="cardNumber" autocomplete="off">
        </div>
        <div class="card-input">
          <label for="cardName" class="card-input__label">Card Holders</label>
          <input type="text" id="cardName" class="card-input__input" v-model="cardName" v-on:focus="focusInput" v-on:blur="blurInput" data-ref="cardName" autocomplete="off">
        </div>
        <div class="card-form__row">
          <div class="card-form__col">
            <div class="card-form__group">
              <label for="cardMonth" class="card-input__label">Expiration Date</label>
              <select class="card-input__input -select" id="cardMonth" v-model="cardMonth" v-on:focus="focusInput" v-on:blur="blurInput" data-ref="cardDate">
                <option value="" disabled selected>Month</option>
                <option v-bind:value="n < 10 ? '0' + n : n" v-for="n in 12" v-bind:disabled="n < minCardMonth" v-bind:key="n">
                    {{n < 10 ? '0' + n : n}}
                </option>
              </select>
              <select class="card-input__input -select" id="cardYear" v-model="cardYear" v-on:focus="focusInput" v-on:blur="blurInput" data-ref="cardDate">
                <option value="" disabled selected>Year</option>
                <option v-bind:value="$index + minCardYear" v-for="(n, $index) in 12" v-bind:key="n">
                    {{$index + minCardYear}}
                </option>
              </select>
            </div>
          </div>
          <div class="card-form__col -cvv">
            <div class="card-input">
              <label for="cardCvv" class="card-input__label">CVV</label>
              <input type="text" class="card-input__input" id="cardCvv" v-mask="'####'" maxlength="4" v-model="cardCvv" v-on:focus="flipCard(true)" v-on:blur="flipCard(false)" autocomplete="off">
            </div>
          </div>
        </div>

<button class="card-form__button">
          Submit
        </button>
      </div>
    </div>
    
  </div>

</body>
</html>

CSS

@import url("https://fonts.googleapis.com/css?family=Source+Code+Pro:400,500,600,700|Source+Sans+Pro:400,600,700&display=swap");
body {
  background: #252432;

font-family: "Source Sans Pro", sans-serif;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}
*:focus {
  outline: none;
}

.wrapper {
  min-height: 100vh;
  display: flex;
  padding: 50px 15px;
}
@media screen and (max-width: 700px), (max-height: 500px) {
  .wrapper {
    flex-wrap: wrap;
    flex-direction: column;
  }
}

.card-form {
  max-width: 570px;
  margin: auto;
  width: 100%;
}
@media screen and (max-width: 576px) {
  .card-form {
    margin: 0 auto;
  }
}
.card-form__inner {
  background: #fff;
  box-shadow: 0 30px 60px 0 rgba(90, 116, 148, 0.4);
  border-radius: 10px;
  padding: 35px;
  padding-top: 180px;
}
@media screen and (max-width: 480px) {
  .card-form__inner {
    padding: 25px;
    padding-top: 165px;
  }
}
@media screen and (max-width: 360px) {
  .card-form__inner {
    padding: 15px;
    padding-top: 165px;
  }
}
.card-form__row {
  display: flex;
  align-items: flex-start;
}
@media screen and (max-width: 480px) {
  .card-form__row {
    flex-wrap: wrap;
  }
}
.card-form__col {
  flex: auto;
  margin-right: 35px;
}
.card-form__col:last-child {
  margin-right: 0;
}
@media screen and (max-width: 480px) {
  .card-form__col {
    margin-right: 0;
    flex: unset;
    width: 100%;
    margin-bottom: 20px;
  }
  .card-form__col:last-child {
    margin-bottom: 0;
  }
}
.card-form__col.-cvv {
  max-width: 150px;
}
@media screen and (max-width: 480px) {
  .card-form__col.-cvv {
    max-width: initial;
  }
}
.card-form__group {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
}
.card-form__group .card-input__input {
  flex: 1;
  margin-right: 15px;
}
.card-form__group .card-input__input:last-child {
  margin-right: 0;
}
.card-form__button {
  width: 100%;
  height: 55px;
  background: #2364d2;
  border: none;
  border-radius: 5px;
  font-size: 22px;
  font-weight: 500;
  font-family: "Source Sans Pro", sans-serif;
  box-shadow: 3px 10px 20px 0px rgba(35, 100, 210, 0.3);
  color: #fff;
  margin-top: 20px;
  cursor: pointer;
}
@media screen and (max-width: 480px) {
  .card-form__button {
    margin-top: 10px;
  }
}

.card-item {
  max-width: 430px;
  height: 270px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 2;
  width: 100%;
}
@media screen and (max-width: 480px) {
  .card-item {
    max-width: 310px;
    height: 220px;
    width: 90%;
  }
}
@media screen and (max-width: 360px) {
  .card-item {
    height: 180px;
  }
}
.card-item.-active .card-item__side.-front {
  transform: perspective(1000px) rotateY(180deg) rotateX(0deg) rotateZ(0deg);
}
.card-item.-active .card-item__side.-back {
  transform: perspective(1000px) rotateY(0) rotateX(0deg) rotateZ(0deg);
}
.card-item__focus {
  position: absolute;
  z-index: 3;
  border-radius: 5px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  transition: all 0.35s cubic-bezier(0.71, 0.03, 0.56, 0.85);
  opacity: 0;
  pointer-events: none;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.65);
}
.card-item__focus:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background: #08142f;
  height: 100%;
  border-radius: 5px;
  filter: blur(25px);
  opacity: 0.5;
}
.card-item__focus.-active {
  opacity: 1;
}
.card-item__side {
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 20px 60px 0 rgba(14, 42, 90, 0.55);
  transform: perspective(2000px) rotateY(0deg) rotateX(0deg) rotate(0deg);
  transform-style: preserve-3d;
  transition: all 0.8s cubic-bezier(0.71, 0.03, 0.56, 0.85);
  backface-visibility: hidden;
  height: 100%;
}
.card-item__side.-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transform: perspective(2000px) rotateY(-180deg) rotateX(0deg) rotate(0deg);
  z-index: 2;
  padding: 0;
  height: 100%;
}
.card-item__side.-back .card-item__cover {
  transform: rotateY(-180deg);
}
.card-item__bg {
  max-width: 100%;
  display: block;
  max-height: 100%;
  height: 100%;
  width: 100%;
  object-fit: cover;
}
.card-item__cover {
  height: 100%;
  background-color: #1c1d27;
  position: absolute;
  height: 100%;
  background-color: #1c1d27;
  left: 0;
  top: 0;
  width: 100%;
  border-radius: 15px;
  overflow: hidden;
}
.card-item__cover:after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(6, 2, 29, 0.45);
}
.card-item__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 40px;
  padding: 0 10px;
}
@media screen and (max-width: 480px) {
  .card-item__top {
    margin-bottom: 25px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__top {
    margin-bottom: 15px;
  }
}
.card-item__chip {
  width: 60px;
}
@media screen and (max-width: 480px) {
  .card-item__chip {
    width: 50px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__chip {
    width: 40px;
  }
}
.card-item__type {
  height: 45px;
  position: relative;
  display: flex;
  justify-content: flex-end;
  max-width: 100px;
  margin-left: auto;
  width: 100%;
}
@media screen and (max-width: 480px) {
  .card-item__type {
    height: 40px;
    max-width: 90px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__type {
    height: 30px;
  }
}
.card-item__typeImg {
  max-width: 100%;
  object-fit: contain;
  max-height: 100%;
  object-position: top right;
}
.card-item__info {
  color: #fff;
  width: 100%;
  max-width: calc(100% - 85px);
  padding: 10px 15px;
  font-weight: 500;
  display: block;
  cursor: pointer;
}
@media screen and (max-width: 480px) {
  .card-item__info {
    padding: 10px;
  }
}
.card-item__holder {
  opacity: 0.7;
  font-size: 13px;
  margin-bottom: 6px;
}
@media screen and (max-width: 480px) {
  .card-item__holder {
    font-size: 12px;
    margin-bottom: 5px;
  }
}
.card-item__wrapper {
  font-family: "Source Code Pro", monospace;
  padding: 25px 15px;
  position: relative;
  z-index: 4;
  height: 100%;
  text-shadow: 7px 6px 10px rgba(14, 42, 90, 0.8);
  user-select: none;
}
@media screen and (max-width: 480px) {
  .card-item__wrapper {
    padding: 20px 10px;
  }
}
.card-item__name {
  font-size: 18px;
  line-height: 1;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: uppercase;
}
@media screen and (max-width: 480px) {
  .card-item__name {
    font-size: 16px;
  }
}
.card-item__nameItem {
  display: inline-block;
  min-width: 8px;
  position: relative;
}
.card-item__number {
  font-weight: 500;
  line-height: 1;
  color: #fff;
  font-size: 27px;
  margin-bottom: 35px;
  display: inline-block;
  padding: 10px 15px;
  cursor: pointer;
}
@media screen and (max-width: 480px) {
  .card-item__number {
    font-size: 21px;
    margin-bottom: 15px;
    padding: 10px 10px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__number {
    font-size: 19px;
    margin-bottom: 10px;
    padding: 10px 10px;
  }
}
.card-item__numberItem {
  width: 16px;
  display: inline-block;
}
.card-item__numberItem.-active {
  width: 30px;
}
@media screen and (max-width: 480px) {
  .card-item__numberItem {
    width: 13px;
  }
  .card-item__numberItem.-active {
    width: 16px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__numberItem {
    width: 12px;
  }
  .card-item__numberItem.-active {
    width: 8px;
  }
}
.card-item__content {
  color: #fff;
  display: flex;
  align-items: flex-start;
}
.card-item__date {
  flex-wrap: wrap;
  font-size: 18px;
  margin-left: auto;
  padding: 10px;
  display: inline-flex;
  width: 80px;
  white-space: nowrap;
  flex-shrink: 0;
  cursor: pointer;
}
@media screen and (max-width: 480px) {
  .card-item__date {
    font-size: 16px;
  }
}
.card-item__dateItem {
  position: relative;
}
.card-item__dateItem span {
  width: 22px;
  display: inline-block;
}
.card-item__dateTitle {
  opacity: 0.7;
  font-size: 13px;
  padding-bottom: 6px;
  width: 100%;
}
@media screen and (max-width: 480px) {
  .card-item__dateTitle {
    font-size: 12px;
    padding-bottom: 5px;
  }
}
.card-item__band {
  background: rgba(0, 0, 19, 0.8);
  width: 100%;
  height: 50px;
  margin-top: 30px;
  position: relative;
  z-index: 2;
}
@media screen and (max-width: 480px) {
  .card-item__band {
    margin-top: 20px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__band {
    height: 40px;
    margin-top: 10px;
  }
}
.card-item__cvv {
  text-align: right;
  position: relative;
  z-index: 2;
  padding: 15px;
}
.card-item__cvv .card-item__type {
  opacity: 0.7;
}
@media screen and (max-width: 360px) {
  .card-item__cvv {
    padding: 10px 15px;
  }
}
.card-item__cvvTitle {
  padding-right: 10px;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 5px;
}
.card-item__cvvBand {
  height: 45px;
  background: #fff;
  margin-bottom: 30px;
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 10px;
  color: #1a3b5d;
  font-size: 18px;
  border-radius: 4px;
  box-shadow: 0px 10px 20px -7px rgba(32, 56, 117, 0.35);
}
@media screen and (max-width: 480px) {
  .card-item__cvvBand {
    height: 40px;
    margin-bottom: 20px;
  }
}
@media screen and (max-width: 360px) {
  .card-item__cvvBand {
    margin-bottom: 15px;
  }
}

.card-list {
  margin-bottom: -130px;
}
@media screen and (max-width: 480px) {
  .card-list {
    margin-bottom: -120px;
  }
}

.card-input {
  margin-bottom: 20px;
}
.card-input__label {
  font-size: 14px;
  margin-bottom: 5px;
  font-weight: 500;
  color: #1a3b5d;
  width: 100%;
  display: block;
  user-select: none;
}
.card-input__input {
  width: 100%;
  height: 50px;
  border-radius: 5px;
  box-shadow: none;
  border: 1px solid #ced6e0;
  transition: all 0.3s ease-in-out;
  font-size: 18px;
  padding: 5px 15px;
  background: none;
  color: #1a3b5d;
  font-family: "Source Sans Pro", sans-serif;
}
.card-input__input:hover, .card-input__input:focus {
  border-color: #3d9cff;
}
.card-input__input:focus {
  box-shadow: 0px 10px 20px -13px rgba(32, 56, 117, 0.35);
}
.card-input__input.-select {
  -webkit-appearance: none;
  background-image: url("/assets/images/dropdown.png");
  background-size: 12px;
  background-position: 90% center;
  background-repeat: no-repeat;
  padding-right: 30px;
}

.slide-fade-up-enter-active {
  transition: all 0.25s ease-in-out;
  transition-delay: 0.1s;
  position: relative;
}

.slide-fade-up-leave-active {
  transition: all 0.25s ease-in-out;
  position: absolute;
}

.slide-fade-up-enter {
  opacity: 0;
  transform: translateY(15px);
  pointer-events: none;
}

.slide-fade-up-leave-to {
  opacity: 0;
  transform: translateY(-15px);
  pointer-events: none;
}

.slide-fade-right-enter-active {
  transition: all 0.25s ease-in-out;
  transition-delay: 0.1s;
  position: relative;
}

.slide-fade-right-leave-active {
  transition: all 0.25s ease-in-out;
  position: absolute;
}

.slide-fade-right-enter {
  opacity: 0;
  transform: translateX(10px) rotate(45deg);
  pointer-events: none;
}

.slide-fade-right-leave-to {
  opacity: 0;
  transform: translateX(-10px) rotate(45deg);
  pointer-events: none;
}

new Vue({
  el: "#app",
  data() {
    return {
      currentCardBackground: Math.floor(Math.random()* 25 + 1), // just for fun :D
      cardName: "",
      cardNumber: "",
      cardMonth: "",
      cardYear: "",
      cardCvv: "",
      minCardYear: new Date().getFullYear(),
      amexCardMask: "#### ###### #####",
      otherCardMask: "#### #### #### ####",
      cardNumberTemp: "",
      isCardFlipped: false,
      focusElementStyle: null,
      isInputFocused: false
    };
  },
  mounted() {
    this.cardNumberTemp = this.otherCardMask;
    document.getElementById("cardNumber").focus();
  },
  computed: {
    getCardType () {
      let number = this.cardNumber;
      let re = new RegExp("^4");
      if (number.match(re) != null) return "visa";

re = new RegExp("^(34|37)");
      if (number.match(re) != null) return "amex";

re = new RegExp("^5[1-5]");
      if (number.match(re) != null) return "mastercard";

re = new RegExp("^6011");
      if (number.match(re) != null) return "discover";
      
      re = new RegExp('^9792')
      if (number.match(re) != null) return 'troy'

return "visa"; // default type
    },
        generateCardNumberMask () {
            return this.getCardType === "amex" ? this.amexCardMask : this.otherCardMask;
    },
    minCardMonth () {
      if (this.cardYear === this.minCardYear) return new Date().getMonth() + 1;
      return 1;
    }
  },
  watch: {
    cardYear () {
      if (this.cardMonth < this.minCardMonth) {
        this.cardMonth = "";
      }
    }
  },
  methods: {
    flipCard (status) {
      this.isCardFlipped = status;
    },
    focusInput (e) {
      this.isInputFocused = true;
      let targetRef = e.target.dataset.ref;
      let target = this.$refs[targetRef];
      this.focusElementStyle = {
        width: `${target.offsetWidth}px`,
        height: `${target.offsetHeight}px`,
        transform: `translateX(${target.offsetLeft}px) translateY(${target.offsetTop}px)`
      }
    },
    blurInput() {
      let vm = this;
      setTimeout(() => {
        if (!vm.isInputFocused) {
          vm.focusElementStyle = null;
        }
      }, 300);
      vm.isInputFocused = false;
    }
  }