虽然很有问题，但是记记

function modal(data) {
    this.data = data;
    this.each(data.el, data.data);
}

modal.prototype.each = function (data, html) {
    var sys = data.slice(0, 1);
    var ele = data.slice(1, data.length);

    idObj(ele, html, sys);
};
function idObj(id, html, sys) {
    if (sys === "#") {
        var dat = document.getElementById(id);
    } else if (sys === ".") {
        var dat = document.getElementsByClass(id)[0];
    }
    ;
    for (var i in html) {
        var str = "{{" + i + "}}";
        dat.innerHTML = dat.innerHTML.replace(str, html[i]);
    }
};
new modal({
    el: "#page_service_milestones_decoration_log",
    data: {
        time: "2017-05-03",
        zuoze: "方涛",
    }
})