常用方法的js前端项目开发封装

js前端项目开发封装|前端开发者

解决兼容性方法:

//获取元素的计算后样式属性

function getStyle(element, attr) {
if(element.currentStyle) {
return element.currentStyle[attr];
} else {
return window.getComputedStyle(element, null)[attr];
}
}

//scroll().top or scroll().left获取已经滚动到元素的左边界或上边界的像素数

function scroll() {
return {
top: window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0,
left: window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0
};
}

//获取可视窗口大小

function client() {
return {
width: window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth || 0,
height: window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight || 0
};
}

//event兼容

var eventCompatible = {
//event兼容
getEvent: function(event) {
return event || window.event;
},

//阻止冒泡事件
stopPropagation: function(event) {
    var event = event || window.event;
    if(event && event.stopPropagation) {
        return event.stopPropagation();
    } else {
        return event.cancelBubble = true;
    }
},

//event.target 事件的目标 (事件委托)
getTarget: function(event) {
    var event = event || window.event;
    return event.target ? event.target : event.srcElement;
},

//鼠标页面坐标
page: function(event) {
    var event = event || window.event;
    return {
        x: event.pageX || event.clientX + document.documentElement.scrollLeft,
        y: event.pageY || event.clientY + document.documentElement.scrollTop
    };
},

//阻止默认行为
prevent: function(event){
    var event = event || window.event;
    if (event.preventDefault) {
        return event.preventDefault();
    }else{
        return event.returnValue = false;
    }
}

};

//监听事件兼容处理

function eventListener(obj, type, handler, unbind) {
if(unbind === true) {
if(obj.removeEventListener) {
obj.removeEventListener(type, handler);
} else {
obj.detachEvent(“on” + type, handler);
};
} else {
if(obj.addEventListener) {
obj.addEventListener(type, handler);
} else {
obj.attachEvent(“on” + type, handler);
};
};
};

//清除选择

function clearSelection() {
return window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
}

//—————————————————————————————
//———————–自定义的方法————————————————

// trim

function trim(str) {
return str.replace(/^\s+|\s+$/g, “”);
}

//十进制转其他进制 type类型有”bit”、”oct”、”hex”

function changeFromDec(type, value) {
var arr = [“0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, “9”, “A”, “B”, “C”, “D”, “E”, “F”]
var scale = 0;
var sys = “”;
if(!/^[\d]*$/g.test(value)) {
return “”;
}
if(!value) {
return “”;
}
if(type === “bit”) {
scale = 2;
} else if(type === “oct”) {
scale = 8;
} else if(type === “hex”) {
scale = 16;
while(true) {
sys = arr[value % 16] + sys;
value = parseInt(value / 16);
if(!value) {
break;
}
}
return sys;
}
while(true) {
sys = value % scale + sys;
value = parseInt(value / scale);
if(!value) {
break;
}
}
return sys;
}

//二进制、八进制、十六进制转十进制;

function toDec(type, value) {
if(typeof value === “number”) value += “”;
var scale = 0;
var flag = false;
if(type === “bit”) {
flag = /^[01]$/g.test(value);
scale = 2;
} else if(type === “oct”) {
flag = /^[0-7]
$/g.test(value)
scale = 8;
} else if(type === “hex”) {
flag = /^[0-9a-fA-F]$/g.test(value)
scale = 16;
}
if(!flag || !value) return;
var arr = value.split(“”);
var dec = 0;
for(var i = 0; i < arr.length; i++) {
if(isNaN(parseInt(arr[i]))) {
var charCode = arr[i].charCodeAt(0);
if(charCode > 64 && charCode < 71) {
dec += (charCode – 55)
Math.pow(scale, arr.length – 1 – i)
} else if(charCode > 96 && charCode < 103) {
dec += (charCode – 87) Math.pow(scale, arr.length – 1 – i)
}
} else {
dec += arr[i]
Math.pow(scale, arr.length – 1 – i);
}
}
return dec;
}

//转动时钟

function clock() {
var d = new Date();
var ms = d.getMilliseconds();
var s = d.getSeconds() + ms / 1000;
var m = d.getMinutes() + s / 60;
var h = d.getHours() + m / 60;
second.style.transform = “rotate(” + s 6 + “deg)”;
minute.style.transform = “rotate(” + m
6 + “deg)”;
hour.style.transform = “rotate(” + h * 30 + “deg)”;
}

//匀速动画

function animate(obj, attr, distance) {
var step = 20;
var leader = parseInt(getStyle(obj, attr)) || 0
clearInterval(obj.atimer);
obj.atimer = setInterval(function() {
distance > leader ? leader += step : leader -= step;
if(Math.abs(distance – leader) > step) {
obj.style[attr] = leader + “px”;
} else {
obj.style[attr] = distance + “px”;
clearInterval(obj.atimer);
}
}, 15);
}

//缓动动画(单个数值属性)

function slowSpeedAnimate(element, attr, distance) {
clearInterval(element.timer);
element.timer = setInterval(function() {
var removing = parseInt(getStyle(element, attr)) || 0; //element.offsetLeft;
var step = (distance – removing) / 20;
step = step > 0 ? Math.ceil(step) : Math.floor(step);
removing = removing + step;
element.style[attr] = removing + “px”;
if(removing == distance) {
clearInterval(element.timer);
}
}, 15)
}

//缓动动画(多个数值属性)

function moreAnimate(element, json, interval, fn) {
clearInterval(element.timer);
element.timer = setInterval(function() {
var flag = true;
for(var k in json) {
if(k === “opacity”) {
var removing = getStyle(element, k) 100; //element.offsetLeft;
var distance = json[k]
100;
var step = (distance – removing) / interval;
step = step > 0 ? Math.ceil(step) : Math.floor(step);
removing = removing + step;
element.style[k] = removing / 100;
} else {
var removing = parseInt(getStyle(element, k)) || 0; //element.offsetLeft;
var distance = json[k];
var step = (distance – removing) / interval;
step = step > 0 ? Math.ceil(step) : Math.floor(step);
removing = removing + step;
element.style[k] = removing + “px”;
}
if(removing != distance) {
flag = false;
}
}
if(flag) {
clearInterval(element.timer);
if(fn) {
fn();
}
}

}, 15)

}

//进度条

function Progress(id, width, height, outClass, inClass) {
this.width = width;
this.height = height;
this.color = “#fff”;
this.progress = document.createElement(“div”);
this.percentage = document.createElement(“div”);
this.filler = document.createElement(“div”);
var element = document.getElementById(id);
if(width) {
this.progress.style.width = this.width + “px”;
} else {
this.progress.style.width = “200px”;
}
if(height) {
this.progress.style.height = this.height + “px”;
} else {
this.progress.style.height = “20px”;
}
if(typeof outClass === “string” && (/^a-zA-Z+$/g.test(outClass))) {
this.progress.className = outClass;
} else {
this.progress.style.border = “1px solid #cccccc”;
this.progress.style.backgroundImage = “linear-gradient(to bottom, #ccc 0%, #fff 40%, #ccc 100%)”;
this.progress.style.borderRadius = “10px”;
}
this.progress.style.overflow = “hidden”;
this.progress.style.position = “relative”;
element.appendChild(this.progress);
//
this.progress.appendChild(this.percentage);
this.percentage.style.width = “100%”;
this.percentage.style.height = “100%”;
this.percentage.style.textAlign = “center”;
this.percentage.style.position = “absolute”;
this.percentage.innerHTML = “0%”;
//
this.progress.appendChild(this.filler);
this.filler.style.height = “100%”;
this.filler.style.width = 0;
if(typeof inClass === “string” && (/^a-zA-Z+$/g.test(inClass))) {
this.filler.className = inClass;
} else {
this.filler.style.backgroundColor = “#DC7BBE”;
this.filler.style.backgroundImage = “linear-gradient(to bottom, #0AF 0%, #0ff 40%, #0AF 100%)”;
}
}
Progress.prototype.fill = function(value) {
if(value) {
this.percentage.innerHTML = value + “%”;
this.percentage.style.color = this.color;
value = (this.progress.offsetWidth – 2) / 100 * value;
this.filler.style.width = value + “px”;
} else {
this.filler.style.width = 0;
this.percentage.innerHTML = “0%”;
}
}

//ajax封装

function ajax(a, b) { //type, url, async, dataType, data, fn
var xhr = null,
type = “get”,
url = “#”,
async = true,
dataType = “text”,
data = “”,
jsonp = “”,
jsonpCallback = “”,
methodName = “”,
c = null;
if(typeof a === “string”) {
url = a;
}
if(typeof a === “object”) {
c = a;
} else if(typeof b == “object”) {
c = b;
}
if(c) {
if(c.type && typeof c.type === “string”) {
type = c.type;
};
if(c.url && typeof c.url === “string”) {
url = c.url;
};
if(c.async && typeof c.async === “boolean”) {
async = c.async;
};
if(c.dataType && typeof c.dataType === “string”) {
dataType = c.dataType;
};
if(c.data && typeof c.data === “object”) {
var arr = [];
for(k in c.data) {
arr.push(k + “=” + c.data[k]);
}
data = arr.join(“&”);
};
if(c.jsonp && typeof c.jsonp === “string”) {
if(!c.dataType) {
dataType = “jsonp”;
}
jsonp = c.jsonp;
if(data) {
data += “&”;
}
} else {
jsonp = “callback”;
}
if(c.jsonpCallback && typeof c.jsonpCallback === “string”) {
methodName = c.jsonpCallback;
} else {
methodName = “jquery” + new Date().getTime() + “_” + (Math.random() + “”).substr(2);
}
};
if(dataType == “jsonp”) {
data += jsonp + “=” + methodName;
window[methodName] = function(data) {
c.success(data);
}
var script = document.createElement(“script”);
script.src = url + “?” + data;
var head = document.getElementsByTagName(“head”)[0];
head.appendChild(script);
} else {
//ajax部分
if(window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else {
xhr = ActiveXObject(“Microsoft.XMLHTTP”);
}
if(type == “get”) {
if(data) {
url += encodeURI(“?” + data);
}
data = null;
};
xhr.open(type, url, async);
if(type == “post”) {
xhr.setRequestHeader(“Content-Type”, “application/x-www-form-urlencoded”);
};
xhr.send(data);
xhr.onreadystatechange = function() {
if(xhr.readyState == 4 && xhr.status == 200) {
var obj = {
text: xhr.responseText,
json: JSON.parse(xhr.responseText),
};
var data = obj[dataType];
if(typeof c.success === “function”) {
c.success(data);
}
}
}
}
}

//millisec是距离 GMT 时间 1970 年 1 月 1 日午夜的毫秒数 (解析通过ajax返回的数据中的毫秒数值的日期)

function getFullDate(millisec, lang) {
var data = new Date();
data.setTime(millisec);
var year = data.getFullYear(),
month = data.getMonth(),
day = data.getDate(),
week = data.getDay(),
hour = data.getHours(),
minute = data.getMinutes(),
second = data.getSeconds(),
am = “am”,
pm = “pm”,
enWeek = [“Sunday”, “Monday”, “Tuesday”, “Wednesday”, “Thursday”, “Friday”, “Saturday”],
cnWeek = [“星期天”, “星期一”, “星期二”, “星期三”, “星期四”, “星期五”, “星期六”],
enMonth = [“January”, “February”, “March”, “April”, “May”, “June”, “July”, “August”, “September”, “October”, “November”, “December”],
cnMonth = [“一月”, “二月”, “三月”, “四月”, “五月”, “六月”, “七月”, “八月”, “九月”, “十月”, “十一月”, “十二月”],
cnDay = [“廿”, “一”, “二”, “三”, “四”, “五”, “六”, “七”, “八”, “九”, “十”]
if(lang == “cn”) {
am = “上午”;
pm = “下午”;
};
day = day < 10 ? “0” + day : day;
var obj = {
year: year,
month: lang ? (lang == “cn” ? cnMonth[month] : enMonth[month]) : (month < 10 ? “0” + (month + 1) : (month + 1)),
day: day,
week: lang == “en” ? enWeek[week] : cnWeek[week],
hour: hour < 10 ? “0” + hour : hour,
minute: minute < 10 ? “0” + minute : minute,
second: second < 10 ? “0” + second : second,
ms: data.getMilliseconds(),
am: am,
pm: pm,
Hour: hour + minute / 60 > 12 ? (hour == 12 ? pm + hour : pm + hour % 12) : am + hour,
};
return obj;
}

//右键菜单

function RightMenu(area) {
this.area = area;
this.menu = null;
}

//根据传入的值获取目标
RightMenu.prototype.target = function(area) {
if(typeof area === “string”) {
return document.getElementById(area);
} else if(typeof area === “object”) {
return area;
}
}

RightMenu.prototype.init = function(data, defaultStyle, userStyle, hoverStyle) {
this.createMenu(data, defaultStyle, userStyle, hoverStyle);
this.showMenu();
}

RightMenu.prototype.createMenu = function(data, defaultStyle, userStyle, hoverStyle) {
if(typeof defaultStyle == “string” && !defaultStyle) {
hoverStyle = userStyle;
userStyle = defaultStyle;
defaultStyle = true;
}
//创建菜单及样式
this.menu = document.createElement(“ul”);
this.menu.style.position = “absolute”;
this.menu.style.margin = 0;
this.menu.style.padding = “2px”;
this.menu.style.listStyle = “none”;
this.menu.style.display = “none”;
if(!defaultStyle) {
this.menu.style.border = “1px solid #DDDDDD”;
this.menu.style.backgroundColor = “#CCCCCC”;
this.menu.style.boxShadow = “5px 5px 5px #ccc”;
} else {
this.menu.className = userStyle;
}
//选中项样式
var hover = document.createElement(“span”);
hover.style.display = “block”;
hover.style.position = “absolute”
hover.style.top = 0;
hover.style.left = 0;
hover.style.boxSizing = “border-box”;
hover.style.width = “100%”;
hover.style.height = “100%”;
if((!defaultStyle) || (defaultStyle && !hoverStyle)) {
hover.style.border = “1px solid #aaa”;
hover.style.borderRadius = “5px”;
hover.style.backgroundImage = “linear-gradient(to bottom,rgba(255,255,255,0.5)0%,rgba(255,255,255,0.1)50%,rgba(255,255,255,0.1)100%)”;

} else {
    hover.className = hoverStyle;
}
//创建菜单项
for(var item in data) {
    var li = document.createElement("li");
    li.style.position = "relative";
    li.style.padding = "5px 10px";
    li.style.cursor = "pointer";
    //绑定事件
    li.addEventListener("mouseenter", function() {
        this.appendChild(hover);
    });
    li.addEventListener("mouseleave", function() {
        this.removeChild(hover);
    });
    var itemData = data[item]
    for(var obj in itemData) {
        if(typeof itemData[obj] === "string") {
            li.innerHTML = itemData[obj];
        } else if(typeof itemData[obj] === "object") {
            var handlerData = itemData[obj];
            for(var type in handlerData) {
                li.addEventListener(type, handlerData[type]);
            }
        }
    }
    this.menu.appendChild(li);
}
this.target(this.area).appendChild(this.menu);

}

RightMenu.prototype.showMenu = function() {
var that = this;
this.menu.parentNode.oncontextmenu = function(ev) {
that.menu.style.display = “block”;
that.menu.style.left = ev.pageX + “px”;
that.menu.style.top = ev.pageY + “px”;
if(that.menu.parentNode.offsetWidth < that.menu.offsetLeft + that.menu.offsetWidth) {
that.menu.style.left = ev.pageX – that.menu.offsetWidth + “px”;
};
if(that.menu.parentNode.offsetHeight < that.menu.offsetTop + that.menu.offsetHeight) {
that.menu.style.top = ev.pageY – that.menu.offsetHeight + “px”;
};
return false;
}
this.menu.parentNode.onclick = function() {
that.menu.style.display = “none”;
}
document.onkeydown = function(e) {
if(e.keyCode == 18 || e.keyCode == 27) {
that.menu.style.display = “none”;
}
}
}

//拖拽

function Drag(target, area) {
this.target = target;
this.area = area;
}

        //根据传入的值获取目标
        Drag.prototype.dragTarget = function(target) {
            if(typeof target === "string") {
                return document.getElementById(target);
            } else if(typeof target === "object") {
                return target;
            }
        }

        Drag.prototype.init = function() {
            this.target = this.dragTarget(this.target);
            this.target.style.position = "absolute";
            this.target.setAttribute("draggable","true");
            this.dragEvent();
        }

        Drag.prototype.dragEvent = function() {
            var that = this;
            this.target.onmousedown = function(e) {
                e = e || window.event;
                that.disX = e.clientX - that.target.offsetLeft;
                that.disY = e.clientY - that.target.offsetTop;
                document.onmousemove = function(e) {
                    that.moveEvent(e);
                }
                document.onmouseup = function(){
                    that.target.style.opacity = "1";
                    document.onmousemove = document.onmouseup = null;
                }
                return false;
            }
        }
        Drag.prototype.moveEvent = function(e) {
            var limitX = e.clientX - this.disX;
            var limitY = e.clientY - this.disY;
            //没有指定区域则用document

            if (!this.area) {
                this.area = document.documentElement;
            }
            if(limitX < this.area.offsetLeft) {
                limitX = this.area.offsetLeft;
            } else if(limitX > this.area.clientWidth + this.area.offsetLeft - this.target.offsetWidth) {
                limitX =  this.area.clientWidth + this.area.offsetLeft - this.target.offsetWidth;
            }
            if(limitY < this.area.offsetTop) {
                limitY = this.area.offsetTop;
            } else if(limitY > this.area.clientHeight + this.area.offsetTop - this.target.offsetHeight) {
                limitY = this.area.clientHeight + this.area.offsetTop - this.target.offsetHeight;
            }
            this.target.style.left = limitX + "px";
            this.target.style.top = limitY + "px";
            this.target.style.opacity = "0.8";
        }

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