一些常规能用到的js方法

手机号不让显示全

var phone='13123456789'
var showPhone = phone.substr(0,3)+'****'+phone.substr(7);

显示倒计时

  var intDiff = parseInt(19000);//倒计时总秒数
 function timer(intDiff) {
        window.setInterval(function () {
            var day = 0,
                hour = 0,
                minute = 0,
            second = 0;
            if (intDiff > 0) {
                day = Math.floor(intDiff / (60 * 60 * 24));
                hour = Math.floor(intDiff / (60 * 60)) - (day * 24);
                minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);
                second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
            }
            if (minute <= 9) minute = '0' + minute;
            if (second <= 9) second = '0' + second;
            $('#day_show').html(day);
            $('#hour_show').html(hour);
            $('#minute_show').html(minute);
            $('#second_show').html(second);
            intDiff--;
        }, 1000);
    }
    $(function () {
        timer(intDiff);
    });

链接截取某个值

 function getid() {
        let url = window.location.href
        let index = url.indexOf('callback')
        if (index != -1) {
            let param = url.split("callback=")[1]
            if(param.indexOf('&')!=-1){
                let jg=param.split("&")[0]
                temp = jg
            }else{
                temp = param
            }
        }
        console.log(temp)
    }
    

支付宝跳转

         $.ajax({
                type: "POST",
                url: $.url+"api/aliPay/pcPay",
                data: {
                    remark:remark,
                    money:money,
                    orderNo:orderNo,
                    goodsType:"2"
                },
                success: function(r){
                    console.log(r)
                    const div = document.createElement('div');
                    div.innerHTML = r
                    document.body.appendChild(div);
                    document.forms[0].submit();
                }
            });

去除br和空格

    wipeBr(data){
         return data.replace(/\s*/g,"").replace(/<br\s*.?>/ig,'\n')
      }
      

选项卡

    $(".JJFS li").each(function (index) {
            $(this).click(function () {
                $(this).addClass("pd_sx_xz").siblings().removeClass("pd_sx_xz")
                $(".JJ").eq(index).show().siblings(".JJ").hide();
            })
        })
        

上下轮播（还需要引入轮播js）

        $('#gundon').slide({mainCell:"#gundonbox ul",autoPlay:true,effect:"topMarquee",vis:6,interTime:30});
     

页面当中打开一个新的浏览器

 window.open(
        '要跳转的链接',
        "mywindow1",
        "width=800, height=600, menubar=no, toolbar=no, scrollbars=yes"
    );