js-代码简洁之路（六）

1、获取URL参数列表

export const GetRequest = () => {
    let url = location.search;
    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;
};

2、检测URL是否有效

export const getUrlState = (URL) => {
  let xmlhttp = new ActiveXObject("microsoft.xmlhttp");
  xmlhttp.Open("GET", URL, false);
  try {
    xmlhttp.Send();
  } catch (e) {
  } finally {
    let result = xmlhttp.responseText;
    if (result) {
      if (xmlhttp.Status == 200) {
        return true;
      } else {
        return false;
      }
    } else {
      return false;
    }
  }
}

3、键值对拼接成URL参数

export const params2Url = (obj) => {
     let params = []
     for (let key in obj) {
       params.push(`${key}=${obj[key]}`);
     }
     return encodeURIComponent(params.join('&'))
}

4、修改URL中的参数

export const replaceParamVal => (paramName, replaceWith) {
   const oUrl = location.href.toString();
   const re = eval('/('+ paramName+'=)([^&]*)/gi');
   location.href = oUrl.replace(re,paramName+'='+replaceWith);
   return location.href;
}

5、删除URL中指定参数

export const funcUrlDel = (name) => {
  const baseUrl = location.origin + location.pathname + "?";
  const query = location.search.substr(1);
  if (query.indexOf(name) > -1) {
    const obj = {};
    const arr = query.split("&");
    for (let i = 0; i < arr.length; i++) {
      arr[i] = arr[i].split("=");
      obj[arr[i][0]] = arr[i][1];
    }
    delete obj[name];
    return baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g,"").replace(/\:/g,"=").replace(/\,/g,"&");
  }
}

6、判断是移动还是PC设备

export const isMobile = () => {
  if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iOS|iPad|Backerry|WebOS|Symbian|Windows Phone|Phone)/i))) {
		return 'mobile';
  }
  return 'desktop';
}

7、判断是否是苹果还是安卓移动设备

export const isAppleMobileDevice = () => {
  let reg = /iphone|ipod|ipad|Macintosh/i;
  return reg.test(navigator.userAgent.toLowerCase());
}

8、判断是否是安卓移动设备

export const isAndroidMobileDevice = () => {
  return /android/i.test(navigator.userAgent.toLowerCase());
}

9、判断是Windows还是Mac系统

export const osType = () => {
    const agent = navigator.userAgent.toLowerCase();
    const isMac = /macintosh|mac os x/i.test(navigator.userAgent);
  	const isWindows = agent.indexOf("win64") >= 0 || agent.indexOf("wow64") >= 0 || agent.indexOf("win32") >= 0 || agent.indexOf("wow32") >= 0;
    if (isWindows) {
        return "windows";
    }
    if(isMac){
        return "mac";
    }
}

10、判断是否是微信/QQ内置浏览器

export const broswer = () => {
    const ua = navigator.userAgent.toLowerCase();
    if (ua.match(/MicroMessenger/i) == "micromessenger") {
        return "weixin";
    } else if (ua.match(/QQ/i) == "qq") {
        return "QQ";
    }
    return false;
}

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