vue项目里使用JavaScript获取身份证号中的年月日（自测可用）var companyId = app.getAl

var app = require('app');
var companyId = app.getAllQueries().companyId;
new Vue({
    el: '#confirm',
    data: {
        birthday: '',
    },
    created() {

    },
    mounted() {
     this.getBirthdayFromIdCard(身份证号)//方法调用，写在哪儿都可以。注意this指向
    },
    methods: {
        getBirthdayFromIdCard(idCard) {
            var birthday = "";
            if (idCard != null && idCard != "") {
                if (idCard.length == 15) {
                    birthday = "19" + idCard.substr(6, 6);
                } else if (idCard.length == 18) {
                    birthday = idCard.substr(6, 8);
                }

                this.birthday = birthday.replace(/(.{4})(.{2})/, "$1-$2-");

            }

            return birthday;
        },

    }
})