常用js封装方法，持续更新

Posted 2021-11-23 STRIVE_LC

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// 数组去重
function unique1(arr) {
    return […new Set(arr)]
}

function unique2(arr) {
    var obj = {};
    return arr.filter(ele => {
       if (!obj[ele]) {
        obj[ele] = true;
        return true;
       }
    })
}

function unique3(arr) {
    var result = [];
    arr.forEach(ele => {
    if (result.indexOf(ele) == -1) {
    result.push(ele)
    }
    })
    return result;
}

// 数据类型
function whichType(value) {
   return Object.prototype.toString.call(value)
}
    console.log(Object.prototype.toString.call('xxx'));  //'[object String]'
    console.log(Object.prototype.toString.call(12));  //'[object Number]'
    console.log(Object.prototype.toString.call(true));  //'[object Boolean]'
    console.log(Object.prototype.toString.call(undefined));  //'[object Undefined]'
    console.log(Object.prototype.toString.call(null));  //'[object Null]'
    console.log(Object.prototype.toString.call({name: "licong"}));  //'[object Object]'
    console.log(Object.prototype.toString.call(function(){}));  //'[object Function]'
    console.log(Object.prototype.toString.call([]));  //'[object Array]'
    console.log(Object.prototype.toString.call(new Date));  //'[object Date]'
    console.log(Object.prototype.toString.call(/\\d/));  //'[object RegExp]'

// 深拷贝
function deepClone(obj, result) {
  var result = result || {};
  for (var prop in obj) {
    if (obj.hasOwnProperty(prop)) {
      if (typeof obj[prop] == "object" && obj[prop] !== null) {
        // 引用值(obj/array)且不为null
        if (Object.prototype.toString.call(obj[prop]) == "[object Object]") {
          // 对象
          result[prop] = {};
        } else {
          // 数组
          result[prop] = [];
        }
        deepClone(obj[prop], result[prop]);
      } else {
        // 原始值或func
        result[prop] = obj[prop];
      }
    }
  }
  return result;
}

// 判断元素有没有子元素
function hasChildren(e) {
  var children = e.childNodes,
    len = children.length;
  for (var i = 0; i < len; i++) {
    if (children[i].nodeType === 1) {
      return true;
    }
  }
  return false;
}

// 一个元素插入到另一个元素的后面
Element.prototype.insertAfter = function (target, elen) {
  var nextElen = elen.nextElenmentSibling;
  if (nextElen == null) {
    this.appendChild(target);
  } else {
    this.insertBefore(target, nextElen);
  }
};

// 获得滚动条的滚动距离
function getScrollOffset() {
  if (window.pageXOffset) {
    return {
      x: window.pageXOffset,
      y: window.pageYOffset,
    };
  } else {
    return {
      x: document.body.scrollLeft + document.documentElement.scrollLeft,
      y: document.body.scrollTop + document.documentElement.scrollTop,
    };
  }
}


// 获取任一元素的任意属性
function getStyle(elem, prop) {
  return window.getComputedStyle
    ? window.getComputedStyle(elem, null)[prop]
    : elem.currentStyle[prop];
}

// 绑定事件的兼容代码
function addEvent(elem, type, handle) {
  if (elem.addEventListener) {
    //非ie和非ie9
    elem.addEventListener(type, handle, false);
  } else if (elem.attachEvent) {
    //ie6到ie8
    elem.attachEvent("on" + type, function () {
      handle.call(elem);
    });
  } else {
    elem["on" + type] = handle;
  }
}

// 解绑事件
function removeEvent(elem, type, handle) {
  if (elem.removeEventListener) {
    //非ie和非ie9
    elem.removeEventListener(type, handle, false);
  } else if (elem.detachEvent) {
    //ie6到ie8
    elem.detachEvent("on" + type, handle);
  } else {
    elem["on" + type] = null;
  }
}

// 取消冒泡的兼容代码
function stopBubble(e) {
  if (e && e.stopPropagation) {
    e.stopPropagation();
  } else {
    window.event.cancelBubble = true;
  }
}

// 获取地址栏参数
function getUrlParam(name) {
  var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
  var r = window.location.search.substr(1).match(reg);
  if (r != null) return unescape(r[2]);
  return null;
}

function getParams(url) => {
  const keyValueArr = url.split('?')[1].split('&')
  let paramObj = {}
  keyValueArr.forEach(item => {
    const keyValue = item.split('=')
    paramObj[keyValue[0]] = keyValue[1]
  })
  return paramObj
}

// 是否是移动端设备
function isMobile() {
    return navigator.userAgent.match(/(iPhone|iPod|android|ios)/i)
}

// 防抖函数
function debounce(fn, delay) {
    var timer = null
    return function () {
        var context = this
        var args = arguments
        clearTimeout(timer)
        timer = setTimeout(function () {
            fn.apply(context, args)
        }, delay)
    }
}

// 计算相隔天数
function calDay(timestamp) => {
  if (!timestamp) {
    return 0
  }
  const now = new Date().getTime() / 1000
  return parseInt((now - timestamp) / 60 / 60 / 24)
}

// 电话号码脱敏处理
function phoneDesensitization(phone) => {
  return phone.replace(/(\\d{3})\\d*(\\d{4})/, '$1****$2')
}

// 校验手机号格式
function varifyPhoneNumber(phone) => {
  return /^1\\d{10}$/.test(phone)
}

// 数组对象中相同的id进行分类
function classify(list) {
    let newData = {}
    list.forEach(item => {
      if (Object.keys(newData).indexOf('' + item.id) === -1) {
        newData[item.id] = []
      }
      newData[item.id].push(item)
    })
    return newData
// [{id:'1',title: '123'},{id: '1',title: '456'},{id: '2', title: '789'}]
// {1: [{id: '1', title: '123'},{id: '1', title: '456'}], 2: [{id: '2', title: '789'}]}
}

// 金额字段格式化
function moneyFormat(value) {
        if (value) {
            const nums = value.toString().split('.');
            if (nums[0]) {
                nums[0] = nums[0].replace(/,/g, '');
                const re = /(?=(?!(\\b))(\\d{3})+$)/g;
                nums[0] = nums[0].replace(re, ',');
            }
            if (nums[1]) {
                nums[1] = nums[1].substr(0, 4);
            } else {
                nums[1] = '00';
            }
            return `${nums[0]}.${nums[1]}`;
        } else {
            return '';
        }
    }

// 判断是否是邮箱格式
function isEmail(str) {
    var reg = /^[a-zA-Z0-9]+([._-]*[a-zA-Z0-9]*)*@[a-zA-Z0-9]+.[a-zA-Z0-9{2,5}$]/;
    var result = reg.test(str);
    return result
}


// 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;"
    }

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

// 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")
            }
        }
    }

// 设为首页
function setHomepage() {
        if (document.all) {
            document.body.style.behavior = 'url(#default#homepage)';
            document.body.setHomePage('http://***')
        } 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://***')
        }
    }

// 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)
        }
    }

// 获取页面可视高度
function getPageViewHeight() {
    var d = document, a = d.compatMode == "BackCompat"
            ? d.body
            : d.documentElement;
    return a.clientHeight;
}


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