根据身份证自动获取年龄/出生日期

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<el-form-item label="证件号" prop="idCard">        <el-input             v-model="form.idCard"              size="small"              :disabled="isDisabled"               style="width:90%;"               @blur="getName(form.idCard)"          ></el-input> </el-form-item>   methods: {       getName(iden) {       let val = iden.length;       let sex = null;       let birth = null;       let myDate = new Date();       let month = myDate.getMonth() + 1;       let day = myDate.getDate();       let age = 0; 　　　<br>　　　　//判断身份证位数为18位时去截取时间日期       if (val === 18) {         age = myDate.getFullYear() - iden.substring(6, 10) - 1;         sex = iden.substring(16, 17);         birth =           iden.substring(6, 10) +           "-" +           iden.substring(10, 12) +           "-" +           iden.substring(12, 14);         if (           iden.substring(10, 12) < month ||           (iden.substring(10, 12) == month && iden.substring(12, 14) <= day)         )           age++;       }<br>　　　　<br>　　　　//判断身份证位数为15位时去截取时间日期       if (val === 15) {         age = myDate.getFullYear() - iden.substring(6, 8) - 1901;         sex = iden.substring(13, 14);         birth =           "19" +           iden.substring(6, 8) +           "-" +           iden.substring(8, 10) +           "-" +           iden.substring(10, 12);         if (           iden.substring(8, 10) < month ||           (iden.substring(8, 10) == month && iden.substring(10, 12) <= day)         )           age++;       }       this.form.age = age;       this.form.dob = birth;       // this.getDataInfo();     } }