日常必备的JS工具函数大全

佛系码 等级 398 0 1

为元素添加on方法

Element.prototype.on = Element.prototype.addEventListener;  

NodeList.prototype.on = function (event, fn) {、  
    []['forEach'].call(this, function (el) {  
        el.on(event, fn);  
    });  
    return this;  
};

为元素添加trigger方法

Element.prototype.trigger = function(type, data) {  
  var event = document.createEvent("HTMLEvents");  
  event.initEvent(type, true, true);  
  event.data = data || {};  
  event.eventName = type;  
  event.target = this;  
  this.dispatchEvent(event);  
  return this;  
};  

NodeList.prototype.trigger = function(event) {  
  []["forEach"].call(this, function(el) {  
    el["trigger"](event);  
  });  
  return this;  
};

转义html标签

function HtmlEncode(text) {  
  return text  
    .replace(/&/g, "&")  
    .replace(/"/g, '"')  
    .replace(/</g, "<")  
    .replace(/>/g, ">");  
}

HTML标签转义

// HTML 标签转义  
// @param {Array.<DOMString>} templateData 字符串类型的tokens  
// @param {...} ..vals 表达式占位符的运算结果tokens  
//  
function SaferHTML(templateData) {  
  var s = templateData[0];  
  for (var i = 1; i < arguments.length; i++) {  
    var arg = String(arguments[i]);  
    // Escape special characters in the substitution.  
    s += arg  
      .replace(/&/g, "&amp;")  
      .replace(/</g, "&lt;")  
      .replace(/>/g, "&gt;");  
    // Don't escape special characters in the template.  
    s += templateData[i];  
  }  
  return s;  
}  
// 调用  
var html = SaferHTML`<p>这是关于字符串模板的介绍</p>`;

跨浏览器绑定事件

function addEventSamp(obj, evt, fn) {  
  if (!oTarget) {  
    return;  
  }  
  if (obj.addEventListener) {  
    obj.addEventListener(evt, fn, false);  
  } else if (obj.attachEvent) {  
    obj.attachEvent("on" + evt, fn);  
  } else {  
    oTarget["on" + sEvtType] = fn;  
  }  
}

加入收藏夹

function addFavorite(sURL, sTitle) {  
  try {  
    window.external.addFavorite(sURL, sTitle);  
  } catch (e) {  
    try {  
      window.sidebar.addPanel(sTitle, sURL, "");  
    } catch (e) {  
      alert("加入收藏失败,请使用Ctrl+D进行添加");  
    }  
  }  
}

提取页面代码中所有网址

var aa = document.documentElement.outerHTML  
  .match(  
    /(url(|src=|href=)["']*([^"'()<>[] ]+)["')]*|(http://[w-.]+[^"'()<>[] ]+)/gi  
  )  
  .join("rn")  
  .replace(/^(src=|href=|url()["']*|["'>) ]*$/gim, "");  
alert(aa);

动态加载脚本文件

function appendscript(src, text, reload, charset) {  
  var id = hash(src + text);  
  if (!reload && in_array(id, evalscripts)) return;  
  if (reload && $(id)) {  
    $(id).parentNode.removeChild($(id));  
  }  

  evalscripts.push(id);  
  var scriptNode = document.createElement("script");  
  scriptNode.type = "text/javascript";  
  scriptNode.id = id;  
  scriptNode.charset = charset  
    ? charset  
    : BROWSER.firefox  
    ? document.characterSet  
    : document.charset;  
  try {  
    if (src) {  
      scriptNode.src = src;  
      scriptNode.onloadDone = false;  
      scriptNode.onload = function() {  
        scriptNode.onloadDone = true;  
        JSLOADED[src] = 1;  
      };  
      scriptNode.onreadystatechange = function() {  
        if (  
          (scriptNode.readyState == "loaded" ||  
            scriptNode.readyState == "complete") &&  
          !scriptNode.onloadDone  
        ) {  
          scriptNode.onloadDone = true;  
          JSLOADED[src] = 1;  
        }  
      };  
    } else if (text) {  
      scriptNode.text = text;  
    }  
    document.getElementsByTagName("head")[0].appendChild(scriptNode);  
  } catch (e) {}  
}

返回顶部的通用方法

function backTop(btnId) {  
  var btn = document.getElementById(btnId);  
  var d = document.documentElement;  
  var b = document.body;  
  window.onscroll = set;  
  btn.style.display = "none";  
  btn.onclick = function() {  
    btn.style.display = "none";  
    window.onscroll = null;  
    this.timer = setInterval(function() {  
      d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);  
      b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);  
      if (d.scrollTop + b.scrollTop == 0)  
        clearInterval(btn.timer, (window.onscroll = set));  
    }, 10);  
  };  
  function set() {  
    btn.style.display = d.scrollTop + b.scrollTop > 100 ? "block" : "none";  
  }  
}  
backTop("goTop");

实现base64解码

function base64_decode(data) {  
  var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";  
  var o1,  
    o2,  
    o3,  
    h1,  
    h2,  
    h3,  
    h4,  
    bits,  
    i = 0,  
    ac = 0,  
    dec = "",  
    tmp_arr = [];  
  if (!data) {  
    return data;  
  }  
  data += "";  
  do {  
    h1 = b64.indexOf(data.charAt(i++));  
    h2 = b64.indexOf(data.charAt(i++));  
    h3 = b64.indexOf(data.charAt(i++));  
    h4 = b64.indexOf(data.charAt(i++));  
    bits = (h1 << 18) | (h2 << 12) | (h3 << 6) | h4;  
    o1 = (bits >> 16) & 0xff;  
    o2 = (bits >> 8) & 0xff;  
    o3 = bits & 0xff;  
    if (h3 == 64) {  
      tmp_arr[ac++] = String.fromCharCode(o1);  
    } else if (h4 == 64) {  
      tmp_arr[ac++] = String.fromCharCode(o1, o2);  
    } else {  
      tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);  
    }  
  } while (i < data.length);  
  dec = tmp_arr.join("");  
  dec = utf8_decode(dec);  
  return dec;  
}

确认是否是键盘有效输入值

function checkKey(iKey) {  
  if (iKey == 32 || iKey == 229) {  
    return true;  
  } /*空格和异常*/  
  if (iKey > 47 && iKey < 58) {  
    return true;  
  } /*数字*/  
  if (iKey > 64 && iKey < 91) {  
    return true;  
  } /*字母*/  
  if (iKey > 95 && iKey < 108) {  
    return true;  
  } /*数字键盘1*/  
  if (iKey > 108 && iKey < 112) {  
    return true;  
  } /*数字键盘2*/  
  if (iKey > 185 && iKey < 193) {  
    return true;  
  } /*符号1*/  
  if (iKey > 218 && iKey < 223) {  
    return true;  
  } /*符号2*/  
  return false;  
}

全角半角转换

//iCase: 0全到半,1半到全,其他不转化  
function chgCase(sStr, iCase) {  
  if (  
    typeof sStr != "string" ||  
    sStr.length <= 0 ||  
    !(iCase === 0 || iCase == 1)  
  ) {  
    return sStr;  
  }  
  var i,  
    oRs = [],  
    iCode;  
  if (iCase) {  
    /*半->全*/  
    for (i = 0; i < sStr.length; i += 1) {  
      iCode = sStr.charCodeAt(i);  
      if (iCode == 32) {  
        iCode = 12288;  
      } else if (iCode < 127) {  
        iCode += 65248;  
      }  
      oRs.push(String.fromCharCode(iCode));  
    }  
  } else {  
    /*全->半*/  
    for (i = 0; i < sStr.length; i += 1) {  
      iCode = sStr.charCodeAt(i);  
      if (iCode == 12288) {  
        iCode = 32;  
      } else if (iCode > 65280 && iCode < 65375) {  
        iCode -= 65248;  
      }  
      oRs.push(String.fromCharCode(iCode));  
    }  
  }  
  return oRs.join("");  
}

版本对比

function compareVersion(v1, v2) {  
  v1 = v1.split(".");  
  v2 = v2.split(".");  

  var len = Math.max(v1.length, v2.length);  

  while (v1.length < len) {  
    v1.push("0");  
  }  

  while (v2.length < len) {  
    v2.push("0");  
  }  

  for (var i = 0; i < len; i++) {  
    var num1 = parseInt(v1[i]);  
    var num2 = parseInt(v2[i]);  

    if (num1 > num2) {  
      return 1;  
    } else if (num1 < num2) {  
      return -1;  
    }  
  }  
  return 0;  
}

压缩CSS样式代码

function compressCss(s) {  
  //压缩代码  
  s = s.replace(//*(.|n)*?*//g, ""); //删除注释  
  s = s.replace(/s*([{}:;,])s*/g, "$1");  
  s = s.replace(/,[s.#d]*{/g, "{"); //容错处理  
  s = s.replace(/;s*;/g, ";"); //清除连续分号  
  s = s.match(/^s*(S+(s+S+)*)s*$/); //去掉首尾空白  
  return s == null ? "" : s[1];  
}

获取当前路径

var currentPageUrl = "";  
if (typeof this.href === "undefined") {  
  currentPageUrl = document.location.toString().toLowerCase();  
} else {  
  currentPageUrl = this.href.toString().toLowerCase();  
}

字符串长度截取

function cutstr(str, len) {  
    var temp,  
        icount = 0,  
        patrn = /[^x00-xff]/,  
        strre = "";  
    for (var i = 0; i < str.length; i++) {  
        if (icount < len - 1) {  
            temp = str.substr(i, 1);  
                if (patrn.exec(temp) == null) {  
                   icount = icount + 1  
            } else {  
                icount = icount + 2  
            }  
            strre += temp  
            } else {  
            break;  
        }  
    }  
    return strre + "..."  
}

时间日期格式转换

Date.prototype.format = function(formatStr) {  
  var str = formatStr;  
  var Week = ["日", "一", "二", "三", "四", "五", "六"];  
  str = str.replace(/yyyy|YYYY/, this.getFullYear());  
  str = str.replace(  
    /yy|YY/,  
    this.getYear() % 100 > 9  
      ? (this.getYear() % 100).toString()  
      : "0" + (this.getYear() % 100)  
  );  
  str = str.replace(  
    /MM/,  
    this.getMonth() + 1 > 9  
      ? (this.getMonth() + 1).toString()  
      : "0" + (this.getMonth() + 1)  
  );  
  str = str.replace(/M/g, this.getMonth() + 1);  
  str = str.replace(/w|W/g, Week[this.getDay()]);  
  str = str.replace(  
    /dd|DD/,  
    this.getDate() > 9 ? this.getDate().toString() : "0" + this.getDate()  
  );  
  str = str.replace(/d|D/g, this.getDate());  
  str = str.replace(  
    /hh|HH/,  
    this.getHours() > 9 ? this.getHours().toString() : "0" + this.getHours()  
  );  
  str = str.replace(/h|H/g, this.getHours());  
  str = str.replace(  
    /mm/,  
    this.getMinutes() > 9  
      ? this.getMinutes().toString()  
      : "0" + this.getMinutes()  
  );  
  str = str.replace(/m/g, this.getMinutes());  
  str = str.replace(  
    /ss|SS/,  
    this.getSeconds() > 9  
      ? this.getSeconds().toString()  
      : "0" + this.getSeconds()  
  );  
  str = str.replace(/s|S/g, this.getSeconds());  
  return str;  
};  

// 或  
Date.prototype.format = function(format) {  
  var o = {  
    "M+": this.getMonth() + 1, //month  
    "d+": this.getDate(), //day  
    "h+": this.getHours(), //hour  
    "m+": this.getMinutes(), //minute  
    "s+": this.getSeconds(), //second  
    "q+": Math.floor((this.getMonth() + 3) / 3), //quarter  
    S: this.getMilliseconds() //millisecond  
  };  
  if (/(y+)/.test(format))  
    format = format.replace(  
      RegExp.$1,  
      (this.getFullYear() + "").substr(4 - RegExp.$1.length)  
    );  
  for (var k in o) {  
    if (new RegExp("(" + k + ")").test(format))  
      format = format.replace(  
        RegExp.$1,  
        RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)  
      );  
  }  
  return format;  
};  
alert(new Date().format("yyyy-MM-dd hh:mm:ss"));

跨浏览器删除事件

function delEvt(obj, evt, fn) {  
  if (!obj) {  
    return;  
  }  
  if (obj.addEventListener) {  
    obj.addEventListener(evt, fn, false);  
  } else if (oTarget.attachEvent) {  
    obj.attachEvent("on" + evt, fn);  
  } else {  
    obj["on" + evt] = fn;  
  }  
}

判断是否以某个字符串结束

String.prototype.endWith = function(s) {  
  var d = this.length - s.length;  
  return d >= 0 && this.lastIndexOf(s) == d;  
};

返回脚本内容

function evalscript(s) {  
  if (s.indexOf("<script") == -1) return s;  
  var p = /<script[^>]*?>([^x00]*?)</script>/gi;  
  var arr = [];  
  while ((arr = p.exec(s))) {  
    var p1 = /<script[^>]*?src="([^>]*?)"[^>]*?(reload="1")?(?:charset="([w-]+?)")?></script>/i;  
    var arr1 = [];  
    arr1 = p1.exec(arr[0]);  
    if (arr1) {  
      appendscript(arr1[1], "", arr1[2], arr1[3]);  
    } else {  
      p1 = /<script(.*?)>([^x00]+?)</script>/i;  
      arr1 = p1.exec(arr[0]);  
      appendscript("", arr1[2], arr1[1].indexOf("reload=") != -1);  
    }  
  }  
  return s;  
}

格式化CSS样式代码

function formatCss(s) {  
  //格式化代码  
  s = s.replace(/s*([{}:;,])s*/g, "$1");  
  s = s.replace(/;s*;/g, ";"); //清除连续分号  
  s = s.replace(/,[s.#d]*{/g, "{");  
  s = s.replace(/([^s]){([^s])/g, "$1 {nt$2");  
  s = s.replace(/([^s])}([^n]*)/g, "$1n}n$2");  
  s = s.replace(/([^s]);([^s}])/g, "$1;nt$2");  
  return s;  
}

获取cookie值

function getCookie(name) {  
  var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));  
  if (arr != null) return unescape(arr[2]);  
  return null;  
}

获得URL中GET参数值

// 用法:如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得:GET["t1"], GET["t2"], GET["t3"]  
function getGet() {  
  querystr = window.location.href.split("?");  
  if (querystr[1]) {  
    GETs = querystr[1].split("&");  
    GET = [];  
    for (i = 0; i < GETs.length; i++) {  
      tmp_arr = GETs.split("=");  
      key = tmp_arr[0];  
      GET[key] = tmp_arr[1];  
    }  
  }  
  return querystr[1];  
}

获取移动设备初始化大小

function getInitZoom() {  
  if (!this._initZoom) {  
    var screenWidth = Math.min(screen.height, screen.width);  
    if (this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()) {  
      screenWidth = screenWidth / window.devicePixelRatio;  
    }  
    this._initZoom = screenWidth / document.body.offsetWidth;  
  }  
  return this._initZoom;  
}

获取页面高度

function getPageHeight() {  
  var g = document,  
    a = g.body,  
    f = g.documentElement,  
    d = g.compatMode == "BackCompat" ? a : g.documentElement;  
  return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);  
}

获取页面scrollLeft

function getPageScrollLeft() {  
  var a = document;  
  return a.documentElement.scrollLeft || a.body.scrollLeft;  
}

获取页面scrollTop

function getPageScrollTop() {  
  var a = document;  
  return a.documentElement.scrollTop || a.body.scrollTop;  
}

获取页面可视高度

function getPageViewHeight() {  
  var d = document,  
    a = d.compatMode == "BackCompat" ? d.body : d.documentElement;  
  return a.clientHeight;  
}

获取页面可视宽度

function getPageViewWidth() {  
  var d = document,  
    a = d.compatMode == "BackCompat" ? d.body : d.documentElement;  
  return a.clientWidth;  
}

获取页面宽度

function getPageWidth() {  
  var g = document,  
    a = g.body,  
    f = g.documentElement,  
    d = g.compatMode == "BackCompat" ? a : g.documentElement;  
  return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);  
}

获取移动设备屏幕宽度

function getScreenWidth() {  
  var smallerSide = Math.min(screen.width, screen.height);  
  var fixViewPortsExperiment =  
    rendererModel.runningExperiments.FixViewport ||  
    rendererModel.runningExperiments.fixviewport;  
  var fixViewPortsExperimentRunning =  
    fixViewPortsExperiment && fixViewPortsExperiment.toLowerCase() === "new";  
  if (fixViewPortsExperiment) {  
    if (this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()) {  
      smallerSide = smallerSide / window.devicePixelRatio;  
    }  
  }  
  return smallerSide;  
}

获取网页被卷去的位置

function getScrollXY() {  
  return document.body.scrollTop  
    ? {  
        x: document.body.scrollLeft,  
        y: document.body.scrollTop  
      }  
    : {  
        x: document.documentElement.scrollLeft,  
        y: document.documentElement.scrollTop  
      };  
}

获取URL上的参数

// 获取URL中的某参数值,不区分大小写  
// 获取URL中的某参数值,不区分大小写,  
// 默认是取'hash'里的参数,  
// 如果传其他参数支持取‘search’中的参数  
// @param {String} name 参数名称  
export function getUrlParam(name, type = "hash") {  
  let newName = name,  
    reg = new RegExp("(^|&)" + newName + "=([^&]*)(&|$)", "i"),  
    paramHash = window.location.hash.split("?")[1] || "",  
    paramSearch = window.location.search.split("?")[1] || "",  
    param;  

  type === "hash" ? (param = paramHash) : (param = paramSearch);  

  let result = param.match(reg);  

  if (result != null) {  
    return result[2].split("/")[0];  
  }  
  return null;  
}

检验URL链接是否有效

function getUrlState(URL) {  
  var xmlhttp = new ActiveXObject("microsoft.xmlhttp");  
  xmlhttp.Open("GET", URL, false);  
  try {  
    xmlhttp.Send();  
  } catch (e) {  
  } finally {  
    var result = xmlhttp.responseText;  
    if (result) {  
      if (xmlhttp.Status == 200) {  
        return true;  
      } else {  
        return false;  
      }  
    } else {  
      return false;  
    }  
  }  
}

获取窗体可见范围的宽与高

function getViewSize() {  
  var de = document.documentElement;  
  var db = document.body;  
  var viewW = de.clientWidth == 0 ? db.clientWidth : de.clientWidth;  
  var viewH = de.clientHeight == 0 ? db.clientHeight : de.clientHeight;  
  return Array(viewW, viewH);  
}

获取移动设备最大化大小

function getZoom() {  
  var screenWidth =  
    Math.abs(window.orientation) === 90  
      ? Math.max(screen.height, screen.width)  
      : Math.min(screen.height, screen.width);  
  if (this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()) {  
    screenWidth = screenWidth / window.devicePixelRatio;  
  }  
  var FixViewPortsExperiment =  
    rendererModel.runningExperiments.FixViewport ||  
    rendererModel.runningExperiments.fixviewport;  
  var FixViewPortsExperimentRunning =  
    FixViewPortsExperiment &&  
    (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");  
  if (FixViewPortsExperimentRunning) {  
    return screenWidth / window.innerWidth;  
  } else {  
    return screenWidth / document.body.offsetWidth;  
  }  
}

判断是否安卓移动设备访问

function isAndroidMobileDevice() {  
  return /android/i.test(navigator.userAgent.toLowerCase());  
}

判断是否苹果移动设备访问

function isAppleMobileDevice() {  
  return /iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase());  
}

判断是否为数字类型

function isDigit(value) {  
  var patrn = /^[0-9]*$/;  
  if (patrn.exec(value) == null || value == "") {  
    return false;  
  } else {  
    return true;  
  }  
}

是否是某类手机型号

// 用devicePixelRatio和分辨率判断  
const isIphonex = () => {  
  // X XS, XS Max, XR  
  const xSeriesConfig = [  
    {  
      devicePixelRatio: 3,  
      width: 375,  
      height: 812  
    },  
    {  
      devicePixelRatio: 3,  
      width: 414,  
      height: 896  
    },  
    {  
      devicePixelRatio: 2,  
      width: 414,  
      height: 896  
    }  
  ];  
  // h5  
  if (typeof window !== "undefined" && window) {  
    const isIOS = /iphone/gi.test(window.navigator.userAgent);  
    if (!isIOS) return false;  
    const { devicePixelRatio, screen } = window;  
    const { width, height } = screen;  
    return xSeriesConfig.some(  
      item =>  
        item.devicePixelRatio === devicePixelRatio &&  
        item.width === width &&  
        item.height === height  
    );  
  }  
  return false;  
};

判断是否移动设备

function isMobile() {  
  if (typeof this._isMobile === "boolean") {  
    return this._isMobile;  
  }  
  var screenWidth = this.getScreenWidth();  
  var fixViewPortsExperiment =  
    rendererModel.runningExperiments.FixViewport ||  
    rendererModel.runningExperiments.fixviewport;  
  var fixViewPortsExperimentRunning =  
    fixViewPortsExperiment && fixViewPortsExperiment.toLowerCase() === "new";  
  if (!fixViewPortsExperiment) {  
    if (!this.isAppleMobileDevice()) {  
      screenWidth = screenWidth / window.devicePixelRatio;  
    }  
  }  
  var isMobileScreenSize = screenWidth < 600;  
  var isMobileUserAgent = false;  
  this._isMobile = isMobileScreenSize && this.isTouchScreen();  
  return this._isMobile;  
}

判断吗是否手机号码

function isMobileNumber(e) {  
  var i =  
      "134,135,136,137,138,139,150,151,152,157,158,159,187,188,147,182,183,184,178",  
    n = "130,131,132,155,156,185,186,145,176",  
    a = "133,153,180,181,189,177,173,170",  
    o = e || "",  
    r = o.substring(0, 3),  
    d = o.substring(0, 4),  
    s =  
      !!/^1d{10}$/.test(o) &&  
      (n.indexOf(r) >= 0  
        ? "联通"  
        : a.indexOf(r) >= 0  
        ? "电信"  
        : "1349" == d  
        ? "电信"  
        : i.indexOf(r) >= 0  
        ? "移动"  
        : "未知");  
  return s;  
}

判断是否是移动设备访问

function isMobileUserAgent() {  
  return /iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(  
    window.navigator.userAgent.toLowerCase()  
  );  
}

判断鼠标是否移出事件

function isMouseOut(e, handler) {  
  if (e.type !== "mouseout") {  
    return false;  
  }  
  var reltg = e.relatedTarget  
    ? e.relatedTarget  
    : e.type === "mouseout"  
    ? e.toElement  
    : e.fromElement;  
  while (reltg && reltg !== handler) {  
    reltg = reltg.parentNode;  
  }  
  return reltg !== handler;  
}

判断是否Touch屏幕

function isTouchScreen() {  
  return (  
    "ontouchstart" in window ||  
    (window.DocumentTouch && document instanceof DocumentTouch)  
  );  
}

判断是否为网址

function isURL(strUrl) {  
  var regular = /^b(((https?|ftp)://)?[-a-z0-9]+(.[-a-z0-9]+)*.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]d)|(1dd)|([1-9]d)|d))b(/[-a-z0-9_:@&?=+,.!/~%$]*)?)$/i;  
  if (regular.test(strUrl)) {  
    return true;  
  } else {  
    return false;  
  }  
}

判断是否打开视窗

function isViewportOpen() {  
  return !!document.getElementById("wixMobileViewport");  
}

加载样式文件

function loadStyle(url) {  
  try {  
    document.createStyleSheet(url);  
  } catch (e) {  
    var cssLink = document.createElement("link");  
    cssLink.rel = "stylesheet";  
    cssLink.type = "text/css";  
    cssLink.href = url;  
    var head = document.getElementsByTagName("head")[0];  
    head.appendChild(cssLink);  
  }  
}

替换地址栏

function locationReplace(url) {  
  if (history.replaceState) {  
    history.replaceState(null, document.title, url);  
    history.go(0);  
  } else {  
    location.replace(url);  
  }  
}

解决offsetX兼容性问题

// 针对火狐不支持offsetX/Y  
function getOffset(e) {  
  var target = e.target, // 当前触发的目标对象  
    eventCoord,  
    pageCoord,  
    offsetCoord;  

  // 计算当前触发元素到文档的距离  
  pageCoord = getPageCoord(target);  

  // 计算光标到文档的距离  
  eventCoord = {  
    X: window.pageXOffset + e.clientX,  
    Y: window.pageYOffset + e.clientY  
  };  

  // 相减获取光标到第一个定位的父元素的坐标  
  offsetCoord = {  
    X: eventCoord.X - pageCoord.X,  
    Y: eventCoord.Y - pageCoord.Y  
  };  
  return offsetCoord;  
}  

function getPageCoord(element) {  
  var coord = { X: 0, Y: 0 };  
  // 计算从当前触发元素到根节点为止,  
  // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和  
  while (element) {  
    coord.X += element.offsetLeft;  
    coord.Y += element.offsetTop;  
    element = element.offsetParent;  
  }  
  return coord;  
}

打开一个窗体通用方法

function openWindow(url, windowName, width, height) {  
  var x = parseInt(screen.width / 2.0) - width / 2.0;  
  var y = parseInt(screen.height / 2.0) - height / 2.0;  
  var isMSIE = navigator.appName == "Microsoft Internet Explorer";  
  if (isMSIE) {  
    var p = "resizable=1,location=no,scrollbars=no,width=";  
    p = p + width;  
    p = p + ",height=";  
    p = p + height;  
    p = p + ",left=";  
    p = p + x;  
    p = p + ",top=";  
    p = p + y;  
    retval = window.open(url, windowName, p);  
  } else {  
    var win = window.open(  
      url,  
      "ZyiisPopup",  
      "top=" +  
        y +  
        ",left=" +  
        x +  
        ",scrollbars=" +  
        scrollbars +  
        ",dialog=yes,modal=yes,width=" +  
        width +  
        ",height=" +  
        height +  
        ",resizable=no"  
    );  
    eval("try { win.resizeTo(width, height); } catch(e) { }");  
    win.focus();  
  }  
}

将键值对拼接成URL带参数

export default const fnParams2Url = obj=> {  
      let aUrl = []  
      let fnAdd = function(key, value) {  
        return key + '=' + value  
      }  
      for (var k in obj) {  
        aUrl.push(fnAdd(k, obj[k]))  
      }  
      return encodeURIComponent(aUrl.join('&'))  
 }

去掉url前缀

function removeUrlPrefix(a) {  
  a = a  
    .replace(/:/g, ":")  
    .replace(/./g, ".")  
    .replace(///g, "/");  
  while (  
    trim(a)  
      .toLowerCase()  
      .indexOf("http://") == 0  
  ) {  
    a = trim(a.replace(/http:///i, ""));  
  }  
  return a;  
}

替换全部

String.prototype.replaceAll = function(s1, s2) {  
  return this.replace(new RegExp(s1, "gm"), s2);  
};

resize的操作

(function() {  
  var fn = function() {  
    var w = document.documentElement  
        ? document.documentElement.clientWidth  
        : document.body.clientWidth,  
      r = 1255,  
      b = Element.extend(document.body),  
      classname = b.className;  
    if (w < r) {  
      //当窗体的宽度小于1255的时候执行相应的操作  
    } else {  
      //当窗体的宽度大于1255的时候执行相应的操作  
    }  
  };  
  if (window.addEventListener) {  
    window.addEventListener("resize", function() {  
      fn();  
    });  
  } else if (window.attachEvent) {  
    window.attachEvent("onresize", function() {  
      fn();  
    });  
  }  
  fn();  
})();

滚动到顶部

// 使用document.documentElement.scrollTop 或 document.body.scrollTop 获取到顶部的距离,从顶部  
// 滚动一小部分距离。使用window.requestAnimationFrame()来滚动。  
// @example  
// scrollToTop();  
function scrollToTop() {  
  var c = document.documentElement.scrollTop || document.body.scrollTop;  

  if (c > 0) {  
    window.requestAnimationFrame(scrollToTop);  
    window.scrollTo(0, c - c / 8);  
  }  
}

设置cookie值

function setCookie(name, value, Hours) {  
  var d = new Date();  
  var offset = 8;  
  var utc = d.getTime() + d.getTimezoneOffset() * 60000;  
  var nd = utc + 3600000 * offset;  
  var exp = new Date(nd);  
  exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);  
  document.cookie =  
    name +  
    "=" +  
    escape(value) +  
    ";path=/;expires=" +  
    exp.toGMTString() +  
    ";domain=360doc.com;";  
}

设为首页

function setHomepage() {  
  if (document.all) {  
    document.body.style.behavior = "url(#default#homepage)";  
    document.body.setHomePage("http://w3cboy.com");  
  } else if (window.sidebar) {  
    if (window.netscape) {  
      try {  
        netscape.security.PrivilegeManager.enablePrivilege(  
          "UniversalXPConnect"  
        );  
      } catch (e) {  
        alert(  
          "该操作被浏览器拒绝,如果想启用该功能,请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true"  
        );  
      }  
    }  
    var prefs = Components.classes[  
      "@mozilla.org/preferences-service;1"  
    ].getService(Components.interfaces.nsIPrefBranch);  
    prefs.setCharPref("browser.startup.homepage", "http://w3cboy.com");  
  }  
}

按字母排序,对每行进行数组排序

function setSort() {  
  var text = K1.value  
    .split(/[rn]/)  
    .sort()  
    .join("rn"); //顺序  
  var test = K1.value  
    .split(/[rn]/)  
    .sort()  
    .reverse()  
    .join("rn"); //反序  
  K1.value = K1.value != text ? text : test;  
}

延时执行

// 比如 sleep(1000) 意味着等待1000毫秒,还可从 Promise、Generator、Async/Await 等角度实现。  
// Promise  
const sleep = time => {  
  return new Promise(resolve => setTimeout(resolve, time));  
};  

sleep(1000).then(() => {  
  console.log(1);  
});  


// Generator  
function* sleepGenerator(time) {  
  yield new Promise(function(resolve, reject) {  
    setTimeout(resolve, time);  
  });  
}  

sleepGenerator(1000)  
  .next()  
  .value.then(() => {  
    console.log(1);  
  });  

//async  
function sleep(time) {  
  return new Promise(resolve => setTimeout(resolve, time));  
}  

async function output() {  
  let out = await sleep(1000);  
  console.log(1);  
  return out;  
}  

output();  

function sleep(callback, time) {  
  if (typeof callback === "function") {  
    setTimeout(callback, time);  
  }  
}  

function output() {  
  console.log(1);  
}  

sleep(output, 1000);

判断是否以某个字符串开头

String.prototype.startWith = function(s) {  
  return this.indexOf(s) == 0;  
};

清除脚本内容

function stripscript(s) {  
  return s.replace(/<script.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?>.*?</script.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?.*?/gi, "");  
}

时间个性化输出功能

/*  
1、< 60s, 显示为“刚刚”  
2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”  
3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”  
4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”  
5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”  
*/  
function timeFormat(time) {  
  var date = new Date(time),  
    curDate = new Date(),  
    year = date.getFullYear(),  
    month = date.getMonth() + 10,  
    day = date.getDate(),  
    hour = date.getHours(),  
    minute = date.getMinutes(),  
    curYear = curDate.getFullYear(),  
    curHour = curDate.getHours(),  
    timeStr;  

  if (year < curYear) {  
    timeStr = year + "年" + month + "月" + day + "日 " + hour + ":" + minute;  
  } else {  
    var pastTime = curDate - date,  
      pastH = pastTime / 3600000;  

    if (pastH > curHour) {  
      timeStr = month + "月" + day + "日 " + hour + ":" + minute;  
    } else if (pastH >= 1) {  
      timeStr = "今天 " + hour + ":" + minute + "分";  
    } else {  
      var pastM = curDate.getMinutes() - minute;  
      if (pastM > 1) {  
        timeStr = pastM + "分钟前";  
      } else {  
        timeStr = "刚刚";  
      }  
    }  
  }  
  return timeStr;  
}

全角转换为半角函数

function toCDB(str) {  
  var result = "";  
  for (var i = 0; i < str.length; i++) {  
    code = str.charCodeAt(i);  
    if (code >= 65281 && code <= 65374) {  
      result += String.fromCharCode(str.charCodeAt(i) - 65248);  
    } else if (code == 12288) {  
      result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);  
    } else {  
      result += str.charAt(i);  
    }  
  }  
  return result;  
}

半角转换为全角函数

function toDBC(str) {  
  var result = "";  
  for (var i = 0; i < str.length; i++) {  
    code = str.charCodeAt(i);  
    if (code >= 33 && code <= 126) {  
      result += String.fromCharCode(str.charCodeAt(i) + 65248);  
    } else if (code == 32) {  
      result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);  
    } else {  
      result += str.charAt(i);  
    }  
  }  
  return result;  
}

金额大写转换函数

function transform(tranvalue) {  
  try {  
    var i = 1;  
    var dw2 = new Array("", "万", "亿"); //大单位  
    var dw1 = new Array("拾", "佰", "仟"); //小单位  
    var dw = new Array(  
      "零",  
      "壹",  
      "贰",  
      "叁",  
      "肆",  
      "伍",  
      "陆",  
      "柒",  
      "捌",  
      "玖"  
    );   
    //整数部分用  
    //以下是小写转换成大写显示在合计大写的文本框中  
    //分离整数与小数  
    var source = splits(tranvalue);  
    var num = source[0];  
    var dig = source[1];  
    //转换整数部分  
    var k1 = 0; //计小单位  
    var k2 = 0; //计大单位  
    var sum = 0;  
    var str = "";  
    var len = source[0].length; //整数的长度  
    for (i = 1; i <= len; i++) {  
      var n = source[0].charAt(len - i); //取得某个位数上的数字  
      var bn = 0;  
      if (len - i - 1 >= 0) {  
        bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字  
      }  
      sum = sum + Number(n);  
      if (sum != 0) {  
        str = dw[Number(n)].concat(str); //取得该数字对应的大写数字,并插入到str字符串的前面  
        if (n == "0") sum = 0;  
      }  
      if (len - i - 1 >= 0) {  
        //在数字范围内  
        if (k1 != 3) {  
          //加小单位  
          if (bn != 0) {  
            str = dw1[k1].concat(str);  
          }  
          k1++;  
        } else {  
          //不加小单位,加大单位  
          k1 = 0;  
          var temp = str.charAt(0);  
          if (temp == "万" || temp == "亿")  
            //若大单位前没有数字则舍去大单位  
            str = str.substr(1, str.length - 1);  
          str = dw2[k2].concat(str);  
          sum = 0;  
        }  
      }  
      if (k1 == 3) {  
        //小单位到千则大单位进一  
        k2++;  
      }  
    }  
    //转换小数部分  
    var strdig = "";  
    if (dig != "") {  
      var n = dig.charAt(0);  
      if (n != 0) {  
        strdig += dw[Number(n)] + "角"; //加数字  
      }  
      var n = dig.charAt(1);  
      if (n != 0) {  
        strdig += dw[Number(n)] + "分"; //加数字  
      }  
    }  
    str += "元" + strdig;  
  } catch (e) {  
    return "0元";  
  }  
  return str;  
}  
//拆分整数与小数  
function splits(tranvalue) {  
  var value = new Array("", "");  
  temp = tranvalue.split(".");  
  for (var i = 0; i < temp.length; i++) {  
    value = temp;  
  }  
  return value;  
}

清除空格

String.prototype.trim = function() {  
  var reExtraSpace = /^s*(.*?)s+$/;  
  return this.replace(reExtraSpace, "$1");  
};  

// 清除左空格  
function ltrim(s) {  
  return s.replace(/^(s*| *)/, "");  
}  

// 清除右空格  
function rtrim(s) {  
  return s.replace(/(s*| *)$/, "");  
}

随机数时间戳

function uniqueId() {  
  var a = Math.random,  
    b = parseInt;  
  return (  
    Number(new Date()).toString() + b(10 * a()) + b(10 * a()) + b(10 * a())  
  );  
}

实现utf8解码

function utf8_decode(str_data) {  
  var tmp_arr = [],  
    i = 0,  
    ac = 0,  
    c1 = 0,  
    c2 = 0,  
    c3 = 0;  
  str_data += "";  
  while (i < str_data.length) {  
    c1 = str_data.charCodeAt(i);  
    if (c1 < 128) {  
      tmp_arr[ac++] = String.fromCharCode(c1);  
      i++;  
    } else if (c1 > 191 && c1 < 224) {  
      c2 = str_data.charCodeAt(i + 1);  
      tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));  
      i += 2;  
    } else {  
      c2 = str_data.charCodeAt(i + 1);  
      c3 = str_data.charCodeAt(i + 2);  
      tmp_arr[ac++] = String.fromCharCode(  
        ((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)  
      );  
      i += 3;  
    }  
  }  
  return tmp_arr.join("");  
}
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