先來看看原型圖：

直接上程式碼：

html

<div class="common-part pay-part">
        <div class="common-dialog pay-dialog">
            <div class="dialog-title">請輸入支付密碼</div>
            <div class="pay-money">$10000.00</div>
            <div class="pay-password">
                <input type="tel" maxlength="6" class="real-ipt">
                <div class="surface-ipts">
                    <div class="surface-ipt">
                        <input type="password" >
                        <input type="password" >
                        <input type="password" >
                        <input type="password" >
                        <input type="password" >
                        <input type="password" >
                    </div>
                </div>
            </div>
            <div class="btns">
                <button class="cancel-btn">取消</button>
                <button class="confirm-btn">付款</button>
            </div>
        </div>
    </div>
 

這裡程式碼分為了兩層input輸入框

底層是type=tel（0-9），設定透明opacity: 0;

表層是type=password。

css{}

.common-part{
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    background-color: #000000;
    /*父塊透明，子塊不透明，用rgba*/
    background: rgba(0,0,0,0.3);
}
.common-dialog{
    width: 7.2rem;
    text-align: center;
    position: absolute;
    background: #ffffff;
    z-index: 2;
    opacity: 1;
    border-radius: .1rem;
    border: 1px solid #f2f2f2;
    left: calc(50% - 3.6rem);
    left: -moz-calc(50% - 3.6rem);
    left: -webkit-calc(50% - 3.6rem);
    top: 3rem;
}
.pay-part{
    display: none;
}
.pay-dialog{
    height: 6.9rem;
}
.dialog-title{
    height: 1.5rem;
    line-height: 1.5rem;
    color: #333333;
    font-size: .48rem;
    border-bottom: 1px solid #f2f2f2;
}
.pay-money{
    color: #333333;
    font-size: .6rem;
    margin: .6rem 0;
    font-weight: bold;
}
.pay-password{
    width: 6.6rem;
    height: 1.2rem;
    border: 1px solid #999999;
    margin: 0 auto;
    position: relative;
}
.pay-password .real-ipt{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1.2rem;
    line-height: 1.2rem;
    opacity: 0;
    z-index: 3;
}
.pay-password .surface-ipts{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1.2rem;
    line-height: 1.2rem;
    z-index: 1;
    overflow: hidden;
}
.pay-password .surface-ipts .surface-ipt{
    height: 1.2rem;
    line-height: 1.2rem;
    display: flex;
    justify-content: space-between;
}
.pay-password .surface-ipts .surface-ipt input{
    width: 1.1rem;
    height: 1.12rem;
    line-height: 1.12rem;
    border: 0;
    border-right: 1px solid #999999;
    color: #333333;
    font-size: .9rem;
    text-align: center;
    padding: 0;
}
.pay-part .btns{
    margin: .48rem 0;
}
.cancel-btn{
    width: 3rem;
    height: 1.2rem;
    line-height: 1.2rem;
    background: url("../res/h5tel_btn_blueline_300x120.png") center no-repeat;
    background-size: 100%;
    color: #2ea7e0;
    font-size: .42rem;
    border: none;
}
.confirm-btn{
    width: 3rem;
    height: 1.2rem;
    line-height: 1.2rem;
    background: url("../res/h5tel_btn_blue_300x120.png") center no-repeat;
    background-size: 100%;
    color: #ffffff;
    font-size: .42rem;
    border: none;
    margin-left: .6rem;
}
 

js

$(".buy-confirm").on("click", function () {
                // 開啟支付密碼對話方塊並生成訂單
                $('.pay-part').css("display", "block");
            })
            $(".cancel-btn").on("click", function () {
                $('.pay-part').css("display", "none");
                $inputs.each(function () {  //input清空
                    $(this).val("");
                })
                pwd = "";
                $(".real-ipt").val("");
            })
            $(".confirm-btn").on("click", function () {
                console.log("password:" + pwd);
                if (len === 6 && pwd) {     //付款

                    // $.toast("密碼錯誤")
                    window.location.href = 'activity_buy_result.html'

                } else {
                    $.toast("請輸入支付密碼")
                }
            })

            var pwd = "";
            var len = 0;
            // type=tel input框
            var $inputs = $(".surface-ipt input");
            $(".real-ipt").on("input", function () {
                if (!$(this).val()) {   //無值
                }
                if (/^[0-9]*$/g.test($(this).val())) {  //有值且只能是數字（正則）
                    pwd = $(this).val().trim();
                    len = pwd.length;
                    for (var i in pwd) {
                        $inputs.eq(i).val(pwd[i]);
                    }
                    $inputs.each(function () {  //將有值的當前input 後面的所有input清空
                        var index = $(this).index();
                        if (index >= len) {
                            $(this).val("");
                        }
                    })
                    if (len === 6) {
                        //執行付款操作
                    }

                } else {    //清除val中的非數字，返回純number的value
                    var arr = $(this).val().match(/\d/g);
                    try {
                        $(this).val($(this).val().slice(0,$(this).val().lastIndexOf(arr[arr.length-1])+1));
                    } catch(e) {
                        // console.log(e.message)
                        //清空
                        $(this).val("");
                    }
                }
                console.log("password:" + pwd);
            })
            //  獲取焦點事件避免輸入鍵盤擋住對話方塊
            $('.real-ipt').on('focus', function () {
                $('.pay-dialog').css('top','1rem')
            })
            $('.real-ipt').on('blur', function () {
                $('.pay-dialog').css('top','3rem')
            })
 

用到了jQuery

最後完成效果如圖：

--------------------------------------------------------------------

如需在輸入框加游標顯示，可採用img的方式

<div class="ipt-active-nick"><img src="https://t.alipayobjects.com/images/rmsweb/T1nYJhXalXXXXXXXXX.gif"></div>

.ipt-box-nick .ipt-active-nick {
            width: 40px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            position: absolute;
            top: 0;
            left: 0;
            z-index: 2;
        }
        .ipt-box-nick .ipt-active-nick img {
            vertical-align: middle; }

if(!$(this).val()){//無值游標頂置
            $('.ipt-active-nick').css('left',$input.eq(0).offset().left-parseInt($('.ipt-box-nick').parent().css('padding-left'))+'px');
        }
//
for (var i = 0, len = pwd.length; i < len; i++) {
                $input.eq(i).val(pwd[i]);
                if($input.eq(i).next().length){//模擬游標，先將圖片容器定位，控制left值
                    $('.ipt-active-nick').css('left',$input.eq(i+1).offset().left-parseInt($('.ipt-box-nick').parent().css('padding-left'))+'px');
                }
            }