打造自己的JavaScript武器庫
阿新 • • 發佈：2019-02-06
自己打造一把趁手的武器，高效率完成前端業務程式碼。
前言
作為戰鬥在業務一線的前端，要想少加班，就要想辦法提高工作效率。這裡提一個小點，我們在業務開發過程中，經常會重複用到日期格式化、url引數轉物件、瀏覽器型別判斷、節流函式等一類函式，這些工具類函式，基本上在每個專案都會用到，為避免不同專案多次複製貼上的麻煩，我們可以統一封裝，釋出到npm，以提高開發效率。
這裡，筆者已經封裝併發布了自己的武器庫 outils，如果你對本專案感興趣，歡迎 star 本專案。當然你也可以在本專案的基礎上封裝自己的武器庫。
常用函式彙總
這裡先分類整理下，之前專案中多次用到的工具函式。
1.Array
1.1 arrayEqual
/**
*
* @desc 判斷兩個陣列是否相等
* @param {Array} arr1
* @param {Array} arr2
* @return {Boolean}
*/
function arrayEqual(arr1, arr2) {
if (arr1 === arr2) return true;
if (arr1.length != arr2.length) return false;
for (var i = 0; i < arr1.length; ++i) {
if 2.Class
2.1 addClass
/**
*
* @desc 為元素新增class
* @param {HTMLElement} ele
* @param {String} cls
*/
var hasClass = require('./hasClass');
function addClass(ele, cls) {
if (!hasClass(ele, cls)) {
ele.className += ' ' 2.2 hasClass
/**
*
* @desc 判斷元素是否有某個class
* @param {HTMLElement} ele
* @param {String} cls
* @return {Boolean}
*/
function hasClass(ele, cls) {
return (new RegExp('(\\s|^)' + cls + '(\\s|$)')).test(ele.className);
}2.3 removeClass
/**
*
* @desc 為元素移除class
* @param {HTMLElement} ele
* @param {String} cls
*/
var hasClass = require('./hasClass');
function removeClass(ele, cls) {
if (hasClass(ele, cls)) {
var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
ele.className = ele.className.replace(reg, ' ');
}
}3.Cookie
3.1 getCookie
/**
*
* @desc 根據name讀取cookie
* @param {String} name
* @return {String}
*/
function getCookie(name) {
var arr = document.cookie.replace(/\s/g, "").split(';');
for (var i = 0; i < arr.length; i++) {
var tempArr = arr[i].split('=');
if (tempArr[0] == name) {
return decodeURIComponent(tempArr[1]);
}
}
return '';
}3.2 removeCookie
var setCookie = require('./setCookie');
/**
*
* @desc 根據name刪除cookie
* @param {String} name
*/
function removeCookie(name) {
// 設定已過期，系統會立刻刪除cookie
setCookie(name, '1', -1);
}3.3 setCookie
/**
*
* @desc 設定Cookie
* @param {String} name
* @param {String} value
* @param {Number} days
*/
function setCookie(name, value, days) {
var date = new Date();
date.setDate(date.getDate() + days);
document.cookie = name + '=' + value + ';expires=' + date;
}4.Device
4.1 getExplore
/**
*
* @desc 獲取瀏覽器型別和版本
* @return {String}
*/
function getExplore() {
var sys = {},
ua = navigator.userAgent.toLowerCase(),
s;
(s = ua.match(/rv:([\d.]+)\) like gecko/)) ? sys.ie = s[1]:
(s = ua.match(/msie ([\d\.]+)/)) ? sys.ie = s[1] :
(s = ua.match(/edge\/([\d\.]+)/)) ? sys.edge = s[1] :
(s = ua.match(/firefox\/([\d\.]+)/)) ? sys.firefox = s[1] :
(s = ua.match(/(?:opera|opr).([\d\.]+)/)) ? sys.opera = s[1] :
(s = ua.match(/chrome\/([\d\.]+)/)) ? sys.chrome = s[1] :
(s = ua.match(/version\/([\d\.]+).*safari/)) ? sys.safari = s[1] : 0;
// 根據關係進行判斷
if (sys.ie) return ('IE: ' + sys.ie)
if (sys.edge) return ('EDGE: ' + sys.edge)
if (sys.firefox) return ('Firefox: ' + sys.firefox)
if (sys.chrome) return ('Chrome: ' + sys.chrome)
if (sys.opera) return ('Opera: ' + sys.opera)
if (sys.safari) return ('Safari: ' + sys.safari)
return 'Unkonwn'
}4.2 getOS
/**
*
* @desc 獲取作業系統型別
* @return {String}
*/
function getOS() {
var userAgent = 'navigator' in window && 'userAgent' in navigator && navigator.userAgent.toLowerCase() || '';
var vendor = 'navigator' in window && 'vendor' in navigator && navigator.vendor.toLowerCase() || '';
var appVersion = 'navigator' in window && 'appVersion' in navigator && navigator.appVersion.toLowerCase() || '';
if (/mac/i.test(appVersion)) return 'MacOSX'
if (/win/i.test(appVersion)) return 'windows'
if (/linux/i.test(appVersion)) return 'linux'
if (/iphone/i.test(userAgent) || /ipad/i.test(userAgent) || /ipod/i.test(userAgent)) 'ios'
if (/android/i.test(userAgent)) return 'android'
if (/win/i.test(appVersion) && /phone/i.test(userAgent)) return 'windowsPhone'
}5.Dom
5.1 getScrollTop
/**
*
* @desc 獲取滾動條距頂部的距離
*/
function getScrollTop() {
return (document.documentElement && document.documentElement.scrollTop) || document.body.scrollTop;
}5.2 offset
/**
*
* @desc 獲取一個元素的距離文件(document)的位置，類似jQ中的offset()
* @param {HTMLElement} ele
* @returns { {left: number, top: number} }
*/
function offset(ele) {
var pos = {
left: 0,
top: 0
};
while (ele) {
pos.left += ele.offsetLeft;
pos.top += ele.offsetTop;
ele = ele.offsetParent;
};
return pos;
}5.3 scrollTo
var getScrollTop = require('./getScrollTop');
var setScrollTop = require('./setScrollTop');
var requestAnimFrame = (function () {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000 / 60);
};
})();
/**
*
* @desc 在${duration}時間內，滾動條平滑滾動到${to}指定位置
* @param {Number} to
* @param {Number} duration
*/
function scrollTo(to, duration) {
if (duration < 0) {
setScrollTop(to);
return
}
var diff = to - getScrollTop();
if (diff === 0) return
var step = diff / duration * 10;
requestAnimationFrame(
function () {
if (Math.abs(step) > Math.abs(diff)) {
setScrollTop(getScrollTop() + diff);
return;
}
setScrollTop(getScrollTop() + step);
if (diff > 0 && getScrollTop() >= to || diff < 0 && getScrollTop() <= to) {
return;
}
scrollTo(to, duration - 16);
});
}5.4 setScrollTop
/**
*
* @desc 設定滾動條距頂部的距離
*/
function setScrollTop(value) {
window.scrollTo(0, value);
return value;
}6.Keycode
6.1 getKeyName
var keyCodeMap = {
8: 'Backspace',
9: 'Tab',
13: 'Enter',
16: 'Shift',
17: 'Ctrl',
18: 'Alt',
19: 'Pause',
20: 'Caps Lock',
27: 'Escape',
32: 'Space',
33: 'Page Up',
34: 'Page Down',
35: 'End',
36: 'Home',
37: 'Left',
38: 'Up',
39: 'Right',
40: 'Down',
42: 'Print Screen',
45: 'Insert',
46: 'Delete',
48: '0',
49: '1',
50: '2',
51: '3',
52: '4',
53: '5',
54: '6',
55: '7',
56: '8',
57: '9',
65: 'A',
66: 'B',
67: 'C',
68: 'D',
69: 'E',
70: 'F',
71: 'G',
72: 'H',
73: 'I',
74: 'J',
75: 'K',
76: 'L',
77: 'M',
78: 'N',
79: 'O',
80: 'P',
81: 'Q',
82: 'R',
83: 'S',
84: 'T',
85: 'U',
86: 'V',
87: 'W',
88: 'X',
89: 'Y',
90: 'Z',
91: 'Windows',
93: 'Right Click',
96: 'Numpad 0',
97: 'Numpad 1',
98: 'Numpad 2',
99: 'Numpad 3',
100: 'Numpad 4',
101: 'Numpad 5',
102: 'Numpad 6',
103: 'Numpad 7',
104: 'Numpad 8',
105: 'Numpad 9',
106: 'Numpad *',
107: 'Numpad +',
109: 'Numpad -',
110: 'Numpad .',
111: 'Numpad /',
112: 'F1',
113: 'F2',
114: 'F3',
115: 'F4',
116: 'F5',
117: 'F6',
118: 'F7',
119: 'F8',
120: 'F9',
121: 'F10',
122: 'F11',
123: 'F12',
144: 'Num Lock',
145: 'Scroll Lock',
182: 'My Computer',
183: 'My Calculator',
186: ';',
187: '=',
188: ',',
189: '-',
190: '.',
191: '/',
192: '`',
219: '[',
220: '\\',
221: ']',
222: '\''
};
/**
* @desc 根據keycode獲得鍵名
* @param {Number} keycode
* @return {String}
*/
function getKeyName(keycode) {
if (keyCodeMap[keycode]) {
return keyCodeMap[keycode];
} else {
console.log('Unknow Key(Key Code:' + keycode + ')');
return '';
}
};7.Object
7.1 deepClone
/**
* @desc 深拷貝，支援常見型別
* @param {Any} values
*/
function deepClone(values) {
var copy;
// Handle the 3 simple types, and null or undefined
if (null == values || "object" != typeof values) return values;
// Handle Date
if (values instanceof Date) {
copy = new Date();
copy.setTime(values.getTime());
return copy;
}
// Handle Array
if (values instanceof Array) {
copy = [];
for (var i = 0, len = values.length; i < len; i++) {
copy[i] = deepClone(values[i]);
}