79 lines
2.2 KiB
Vue
79 lines
2.2 KiB
Vue
<template>
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<div class="aa-card">
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<div class="aa-card-field" :class="{ 'is-focus': focused, 'is-valid': valid, 'is-invalid': invalid }">
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<input
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class="aa-card-input"
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:value="display"
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inputmode="numeric"
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maxlength="23"
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:placeholder="placeholder"
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@input="onInput"
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@focus="focused = true"
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@blur="focused = false"
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/>
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<span class="aa-card-type" :class="{ unknown: !cardType }">{{ cardType || '未知' }}</span>
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</div>
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<div class="aa-card-tip" :class="tipClass">{{ tipText }}</div>
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</div>
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</template>
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<script>
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export default {
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name: 'AaBankCardInput',
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props: {
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value: { type: String, default: '' },
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placeholder: { type: String, default: '请输入银行卡号' }
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},
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data() {
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return { digits: this.value.replace(/\D/g, ''), focused: false };
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},
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computed: {
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display() {
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return this.digits.replace(/(.{4})/g, '$1 ').trim();
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},
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cardType() {
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var v = this.digits;
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if (/^4/.test(v)) return 'Visa';
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if (/^5[1-5]/.test(v)) return 'MasterCard';
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if (/^62/.test(v)) return '银联';
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if (/^3[47]/.test(v)) return 'AmEx';
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if (/^35/.test(v)) return 'JCB';
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return '';
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},
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luhn() {
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var v = this.digits, sum = 0, alt = false;
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for (var i = v.length - 1; i >= 0; i--) {
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var n = parseInt(v[i], 10);
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if (alt) { n *= 2; if (n > 9) n -= 9; }
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sum += n; alt = !alt;
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}
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return sum % 10 === 0;
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},
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valid() {
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return this.digits.length >= 13 && this.luhn;
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},
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invalid() {
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return this.digits.length >= 13 && !this.luhn;
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},
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tipClass() {
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return this.valid ? 'valid' : this.invalid ? 'invalid' : '';
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},
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tipText() {
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if (this.digits.length === 0) return '支持 Visa / MasterCard / 银联等';
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if (this.valid) return '卡号校验通过';
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if (this.invalid) return '卡号未通过 Luhn 校验';
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return '继续输入卡号…';
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}
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},
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methods: {
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onInput(e) {
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this.digits = e.target.value.replace(/\D/g, '').slice(0, 19);
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e.target.value = this.display;
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this.$emit('input', this.digits);
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}
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}
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};
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</script>
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<style src="./BankCardInput.css"></style>
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