Vue에서 데이터 형식화 및 유효성 검사를 처리하는 방법

<template>
  <div>
    <p>{{ formatDate(date) }}</p>
  </div>
</template>

<script>
import moment from 'moment';

export default {
  data() {
    return {
      date: '2022-01-01',
    };
  },
  methods: {
    formatDate(date) {
      return moment(date).format('YYYY年MM月DD日');
    },
  },
};
</script>

<template>
  <div>
    <p>{{ amount | formatMoney }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      amount: 1000,
    };
  },
  filters: {
    formatMoney(value) {
      return value.toLocaleString();
    },
  },
};
</script>

<template>
  <div>
    <input v-model="name" type="text" :class="{ 'error': !validateName }" required />
    <button @click="submit">提交</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: '',
    };
  },
  computed: {
    validateName() {
      return this.name.length > 0;
    },
  },
  methods: {
    submit() {
      if (this.validateName) {
        // 提交数据
      } else {
        // 提示用户输入内容
      }
    },
  },
};
</script>

<template>
  <div>
    <input v-model="email" type="text" :class="{ 'error': $v.email.$error }" />
    <button @click="submit">提交</button>
  </div>
</template>

<script>
import { required, email } from 'vuelidate/lib/validators';

export default {
  data() {
    return {
      email: '',
    };
  },
  validations: {
    email: {
      required,
      email,
    },
  },
  methods: {
    submit() {
      if (!this.$v.$invalid) {
        // 提交数据
      } else {
        // 提示用户输入正确的邮箱
      }
    },
  },
};
</script>