JavaScript常用工具函数大全
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2023-10-30 17:41:04
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.addeventli...
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, "&")
.replace(/</g, "<")
.replace(/>/g, ">");
// 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);
}
感兴趣的朋友可以使用在线html/css/javascript代码运行工具：http://tools.jb51.net/code/htmljsrun测试上述代码运行效果。