可以精准实现页面跳转的代码（最后一段函看不懂大佬能帮改善下吗）

(function() {
    var loader = document.getElementById("loader");
    var config = [{
        button: document.getElementById("loader-default"),
        className: "loader-default"
    },
    {
        button: document.getElementById("loader-default-half"),
        className: "loader-default",
        attributes: [{
            attribute: "half"
        }]
    },
    {
        button: document.getElementById("loader-default-blink"),
        className: "loader-default",
        attributes: [{
            attribute: "blink"
        },
        {
            attribute: "data-text"
        }]
    },
    {
        button: document.getElementById("loader-default-inverse"),
        className: "loader-default",
        attributes: [{
            attribute: "inverse"
        }]
    },
    {
        button: document.getElementById("loader-default-text"),
        className: "loader-default",
        attributes: [{
            attribute: "data-text"
        }]
    },
    {
        button: document.getElementById("loader-default-custom-text"),
        className: "loader-default",
        attributes: [{
            attribute: "data-text",
            value: document.getElementById("custom-text")
        }]
    },
    
    
    
    {
        button: document.getElementById("loader-double"),
        className: "loader-double"
    },
    {
        button: document.getElementById("loader-bar"),
        className: "loader-bar"
    },
    {
        button: document.getElementById("loader-bar-rounded"),
        className: "loader-bar",
        attributes: [{
            attribute: "rounded"
        }]
    },
    {
        button: document.getElementById("loader-bar-text"),
        className: "loader-bar",
        attributes: [{
            attribute: "data-text"
        }]
    },
    {
        button: document.getElementById("loader-bar-blink"),
        className: "loader-bar",
        attributes: [{
            attribute: "blink"
        },
        {
            attribute: "data-text"
        }]
    },
    {
        button: document.getElementById("loader-bar-custom-text"),
        className: "loader-bar",
        attributes: [{
            attribute: "data-text",
            value: document.getElementById("bar-custom-text")
        }]
    },
    {
        button: document.getElementById("loader-border"),
        className: "loader-border"
    },
    {
        button: document.getElementById("loader-border-text"),
        className: "loader-border",
        attributes: [{
            attribute: "data-text"
        }]
    },
    {
        button: document.getElementById("loader-border-custom-text"),
        className: "loader-border",
        attributes: [{
            attribute: "data-text",
            value: document.getElementById("border-custom-text")
        }]
    },
    {
        button: document.getElementById("loader-border-blink"),
        className: "loader-border",
        attributes: [{
            attribute: "data-text"
        },
        {
            attribute: "blink"
        }]
    },
    {
        button: document.getElementById("loader-ball"),
        className: "loader-ball"
    },
    {
        button: document.getElementById("loader-ball-shadow"),
        className: "loader-ball",
        attributes: [{
            attribute: "shadow"
        }]
    },
    {
        button: document.getElementById("loader-smartphone"),
        className: "loader-smartphone"
    },
    {
        button: document.getElementById("loader-smartphone-text"),
        className: "loader-smartphone",
        attributes: [{
            attribute: "data-screen"
        }]
    },
    {
        button: document.getElementById("loader-smartphone-custom-text"),
        className: "loader-smartphone",
        attributes: [{
            attribute: "data-screen",
            value: document.getElementById("smartphone-custom-text")
        }]
    },
    {
        button: document.getElementById("loader-clock"),
        className: "loader-clock"
    }];
    
    
    var timer;
    
    loader.addEventListener("click",
    function() {
        for (var i = this.attributes.length - 1; i >= 0; i--) {
            if (this.attributes[i].name !== "id") {
                this.removeAttribute(this.attributes[i].name)
            }
        }
        clearTimeout(timer)
    });
    
    for (var i = 0; i < config.length; i++) { (function(i) {
            config[i]["button"].addEventListener("click",
            function() {
                if (config[i]["attributes"]) {
                    for (var j = 0; j < config[i]["attributes"].length; j++) {
                        var tempAttribute = config[i]["attributes"][j];
                        var tempValue = tempAttribute["value"] ? tempAttribute["value"].value: "";
                        loader.setAttribute(tempAttribute["attribute"], tempValue)
                    }
                }
                loader.classList.add("loader", config[i]["className"], "is-active");
                hideLoader(config[i]["className"], config[i]["attributes"] ? config[i]["attributes"] : [])
            })
        })(i)
    }
    function hideLoader(param) {
        timer = setTimeout(function() {
            loader.classList.remove("is-active", param, "loader");
            
        },5000)
    }
})();