JavaScript常用工具函数大全

本文实例总结了javascript常用工具函数。分享给大家供大家参考，具体如下：

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("\r\n")
 .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 {\n\t$2");
 s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
 s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$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 =
  !!/^1\d{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)|(1\d\d)|([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(/[\r\n]/)
 .sort()
 .join("\r\n"); //顺序
 var test = k1.value
 .split(/[\r\n]/)
 .sort()
 .reverse()
 .join("\r\n"); //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("");
}

以下是puxiao投稿推荐的几个函数，用作常见的输入值校验和替换操作，主要针对*地区的校验规则：

校验是否为一个数字，以及该数字小数点位数是否与参数floats一致

校验规则：

• 若参数floats有值，则校验该数字小数点后的位数。
• 若参数floats没有值，则仅仅校验是否为数字。

function isnum(value,floats=null){
 let regexp = new regexp(`^[1-9][0-9]*.[0-9]{${floats}}$|^0.[0-9]{${floats}}$`);
 return typeof value === 'number' && floats?regexp.test(string(value)):true;
}

function anysicintlength(minlength,maxlength){
 let result_str = '';
 if(minlength){
  switch(maxlength){
   case undefined:
    result_str = result_str.concat(`{${minlength-1}}`);
    break;
   case null:
    result_str = result_str.concat(`{${minlength-1},}`);
    break;
   default:
    result_str = result_str.concat(`{${minlength-1},${maxlength-1}}`);
  }
 }else{
  result_str = result_str.concat('*');
 }

 return result_str;
}

校验是否为非零的正整数

function isint(value,minlength=null,maxlength=undefined){
 if(!isnum(value)) return false;

 let regexp = new regexp(`^-?[1-9][0-9]${anysicintlength(minlength,maxlength)}$`);
 return regexp.test(value.tostring());
}

校验是否为非零的正整数

function ispint(value,minlength=null,maxlength=undefined) {
 if(!isnum(value)) return false;

 let regexp = new regexp(`^[1-9][0-9]${anysicintlength(minlength,maxlength)}$`);
 return regexp.test(value.tostring());
}

校验是否为非零的负整数

function isnint(value,minlength=null,maxlength=undefined){
 if(!isnum(value)) return false;
 let regexp = new regexp(`^-[1-9][0-9]${anysicintlength(minlength,maxlength)}$`);
 return regexp.test(value.tostring());
}

校验整数是否在取值范围内

校验规则：

• minint为在取值范围中最小的整数
• maxint为在取值范围中最大的整数

function checkintrange(value,minint,maxint=9007199254740991){
 return boolean(isint(value) && (boolean(minint!=undefined && minint!=null)?value>=minint:true) && (value<=maxint));
}

校验是否为*手机号

function istel(value) {
 return /^1[3,4,5,6,7,8,9][0-9]{9}$/.test(value.tostring());
}

校验是否为*传真或固定电话号码

function isfax(str) {
 return /^([0-9]{3,4})?[0-9]{7,8}$|^([0-9]{3,4}-)?[0-9]{7,8}$/.test(str);
}

校验是否为邮箱地址

function isemail(str) {
 return /^[a-za-z0-9_-]+@[a-za-z0-9_-]+(\.[a-za-z0-9_-]+)+$/.test(str);
}

校验是否为qq号码

校验规则：

• 非0开头的5位-13位整数

function isqq(value) {
 return /^[1-9][0-9]{4,12}$/.test(value.tostring());
}

校验是否为网址

校验规则：

• 以https://、http://、ftp://、rtsp://、mms://开头、或者没有这些开头
• 可以没有www开头(或其他二级域名)，仅域名
• 网页地址中允许出现/%*?@&等其他允许的符号

function isurl(str) {
 return /^(https:\/\/|http:\/\/|ftp:\/\/|rtsp:\/\/|mms:\/\/)?[a-za-z0-9_-]+(\.[a-za-z0-9_-]+)+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/.test(str);
}

校验是否为不含端口号的ip地址

校验规则：

• ip格式为xxx.xxx.xxx.xxx，每一项数字取值范围为0-255
• 除0以外其他数字不能以0开头，比如02

function isip(str) {
 return /^((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])$/.test(str);
}

校验是否为ipv6地址

校验规则：

• 支持ipv6正常格式
• 支持ipv6压缩格式

function isipv6(str){
 return boolean(str.match(/:/g)?str.match(/:/g).length<=7:false && /::/.test(str)?/^([\da-f]{1,4}(:|::)){1,6}[\da-f]{1,4}$/i.test(str):/^([\da-f]{1,4}:){7}[\da-f]{1,4}$/i.test(str));
}

校验是否为*第二代居民身份证

校验规则：

• 共18位，最后一位可为x(大小写均可)
• 不能以0开头
• 出生年月日会进行校验：年份只能为18/19/2*开头，月份只能为01-12，日只能为01-31

function isidcard(str){
 return /^[1-9][0-9]{5}(18|19|(2[0-9]))[0-9]{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)[0-9]{3}[0-9xx]$/.test(str);
}

校验是否为*邮政编码

参数value为数字或字符串

校验规则：

• 共6位，且不能以0开头

function ispostcode(value){
 return /^[1-9][0-9]{5}$/.test(value.tostring());
}

校验两个参数是否完全相同，包括类型

校验规则：

• 值相同，数据类型也相同

function same(firstvalue,secondvalue){
 return firstvalue===secondvalue;
}

校验字符的长度是否在规定的范围内

校验规则：

• minint为在取值范围中最小的长度
• maxint为在取值范围中最大的长度

function lengthrange(str,minlength,maxlength=9007199254740991) {
 return boolean(str.length >= minlength && str.length <= maxlength);
}

校验字符是否以字母开头

校验规则：

• 必须以字母开头
• 开头的字母不区分大小写

function letterbegin(str){
 return /^[a-z]/.test(str);
}

校验字符是否为纯数字(整数)

校验规则：

• 字符全部为正整数(包含0)
• 可以以0开头

function purenum(str) {
 return /^[0-9]*$/.test(str);
}

function anysicpunctuation(str){
 if(!str) return null;
 let arr = str.split('').map(item => {
  return item = '\\' + item;
 });
 return arr.join('|');
}

function getpunctuation(str){
 return anysicpunctuation(str) || '\\~|\\`|\\!|\\@|\\#|\\$|\\%|\\^|\\&|\\*|\\(|\\)|\\-|\\_|\\+|\\=|\\||\\\|\\[|\\]|\\{|\\}|\\;|\\:|\\"|\\\'|\\,|\\<|\\.|\\>|\\/|\\?';
}

function getexcludepunctuation(str){
 let regexp = new regexp(`[${anysicpunctuation(str)}]`,'g');
 return getpunctuation(' ~`!@#$%^&*()-_+=\[]{};:"\',<.>/?'.replace(regexp,''));
}

返回字符串构成种类(字母，数字，标点符号)的数量

lip缩写的由来：l(letter 字母) + i(uint 数字) + p(punctuation 标点符号)

参数punctuation的说明：

• punctuation指可接受的标点符号集
• 若需自定义符号集，例如“仅包含中划线和下划线”，将参数设置为"-_"即可
• 若不传值或默认为null，则内部默认标点符号集为除空格外的其他英文标点符号：~`!@#$%^&*()-_+=[]{};:"',<.>/?

function getliptypes(str,punctuation=null){
 let p_regexp = new regexp('['+getpunctuation(punctuation)+']');
 return /[a-z]/.test(str) + /[0-9]/.test(str) + p_regexp.test(str);
}

校验字符串构成的种类数量是否大于或等于参数num的值。 通常用来校验用户设置的密码复杂程度。

校验规则：

• 参数num为需要构成的种类(字母、数字、标点符号)，该值只能是1-3。
• 默认参数num的值为1，即表示：至少包含字母，数字，标点符号中的1种
• 若参数num的值为2，即表示：至少包含字母，数字，标点符号中的2种
• 若参数num的值为3，即表示：必须同时包含字母，数字，标点符号
• 参数punctuation指可接受的标点符号集，具体设定可参考getliptypes()方法中关于标点符号集的解释。

function purelip(str,num=1,punctuation=null){
 let regexp = new regexp(`[^a-z0-9|${getpunctuation(punctuation)}]`);
 return boolean(!regexp.test(str) && getliptypes(str,punctuation)>= num);
}

清除所有空格

function clearspaces(str){
 return str.replace(/[ ]/g,'');
}

清除所有中文字符(包括中文标点符号)

function clearcnchars(str){
 return str.replace(/[\u4e00-\u9fa5]/g,'');
}

清除所有中文字符及空格

function clearcncharsandspaces(str){
 return str.replace(/[\u4e00-\u9fa5 ]/g,'');
}

除保留标点符号集以外，清除其他所有英文的标点符号(含空格)

全部英文标点符号为： ~`!@#$%^&*()-_+=[]{};:"',<.>/?

参数excludepunctuation指需要保留的标点符号集，例如若传递的值为'_'，即表示清除_以外的其他所有英文标点符号。

function clearpunctuation(str,excludepunctuation=null){
 let regexp = new regexp(`[${getexcludepunctuation(excludepunctuation)}]`,'g');
 return str.replace(regexp,'');
}

校验是否包含空格

function havespace(str) {
 return /[ ]/.test(str);
}

校验是否包含中文字符(包括中文标点符号)

function havecnchars(str){
 return /[\u4e00-\u9fa5]/.test(str);
}

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