JS基石之-----常用方法封装的js库

解析 URL Params 为对象

let url = 'http://www.domain.com/?user=anonymous&id=123&id=456&city=%E5%8C%97%E4%BA%AC&enabled';
parseParam(url)
/* 结果
{ user: 'anonymous',
  id: [ 123, 456 ], // 重复出现的 key 要组装成数组，能被转成数字的就转成数字类型
  city: '北京', // 中文需解码
  enabled: true, // 未指定值得 key 约定为 true
}
*/
function parseParam(url) {
  const paramsStr = /.+\?(.+)$/.exec(url)[1]; // 将 ? 后面的字符串取出来
  const paramsArr = paramsStr.split('&'); // 将字符串以 & 分割后存到数组中
  let paramsObj = {};
  // 将 params 存到对象中
  paramsArr.forEach(param => {
    if (/=/.test(param)) { // 处理有 value 的参数
      let [key, val] = param.split('='); // 分割 key 和 value
      val = decodeURIComponent(val); // 解码
      val = /^\d+$/.test(val) ? parseFloat(val) : val; // 判断是否转为数字
 
      if (paramsObj.hasOwnProperty(key)) { // 如果对象有 key，则添加一个值
        paramsObj[key] = [].concat(paramsObj[key], val);
      } else { // 如果对象没有这个 key，创建 key 并设置值
        paramsObj[key] = val;
      }
    } else { // 处理没有 value 的参数
      paramsObj[param] = true;
    }
  })
 
  return paramsObj;
}
const getUrlKey = function (name) {
  return (
    decodeURIComponent(
      (new RegExp("[?|&]" + name + "=" + "([^&;]+?)(&|#|;|$)").exec(
        location.href
      ) || [, ""])[1].replace(/\+/g, "%20")
    ) || null
  )
}

/**
 * 封装检验数据类型
 */

 const isType = type => target => `[object ${type}]` ===              Object.prototype.toString.call(target)
  const isArray = isType('Array')
  console.log(isArray(''))

/**
 * 存储localStorage
 */
export const setStore = (name, content) => {
    if (!name) return
    if (typeof content !== 'string') {
        content = JSON.stringify(content)
    }
    window.localStorage.setItem(name, content)
}
 
/**
 * 获取localStorage
 */
export const getStore = name => {
    if (!name) return
    return window.localStorage.getItem(name)
}
 
/**
 * 删除localStorage
 */
export const removeStore = name => {
    if (!name) return
    window.localStorage.removeItem(name)
}
 
/**
 * 设置cookie
 */
export const setCookie = (key, value, day) => {
    const date = new Date()
    date.setDate(date.getDate() + day)
    document.cookie = key + '=' + value + ';expires=' + date + ';path=/'
}
 
/**
 * 获取cookie
 */
export const getCookie = cname => {
    const name = cname + '='
    const ca = document.cookie.split(';')
    for (let i = 0; i < ca.length; i++) {
        let c = ca[i]
        while (c.charAt(0) === ' ') c = c.substring(1)
        if (c.indexOf(name) !== -1) return c.substring(name.length, c.length)
    }
    return ''
}
 
/**
 * 删除cookie
 */
export const delCookie = name => {
    const exp = new Date()
    exp.setTime(exp.getTime() - 1)
    const cval = getCookie(name)
    if (cval != null) {
        document.cookie = name + '=' + cval + ';expires=' + exp.toGMTString() + ';path=/'
    }
}
 
/**
 * 获取url参数
 */
export const getUrlId = name => {
    const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)')
    const r = window.location.search.substr(1).match(reg)
    if (r != null) return unescape(r[2])
    return null
}