js小功能集合

各种实用的js功能

//判断是不是空格
const isNull = (str) =>{
	if ( str == "" ) {
	   return true
	}
	var regu = "^[ ]+$";
	var re = new RegExp(regu);
	
	if(re.test(str)){
		return true
	}else{
		return false
	}
}

/**
 * 手机号验证
 * */
const verifyPhone = (e) =>{
	let myreg = /^1[3-9][0-9]{9}$/;
	if (!myreg.test(e)) {
		console.log('请输入正确的手机号')
	    return false;
	}else{
		return true;
	}
}

/**
 * 最多保留两位小数点
 * */
 const unifyNumber = (num)=> {
     if (num === '') {
       return 0
     } else {
       let handleNum = parseFloat(num)
       let isToFixed = handleNum.toString().includes('.') && handleNum.toString().split('.')[1].length > 2
       if (isToFixed) {
         return handleNum.toFixed(2)
       } else {
         return handleNum
       }
     }
  }
 
 /**
  * 手机号中间隐藏四位数
  * */
  const geTel = (tel) =>{
      var reg = /^(\d{3})\d{4}(\d{4})$/;  
      return tel.replace(reg, "$1****$2");
  }
  
  /**
   * 将2020-02-02转化成2020年02月02日
   * */
const converTime = (e)=>{
	// 将日期格式转化
	var reg =/(\d{4})\-(\d{2})\-(\d{2})/;
	var date = e.replace(reg,"$1年$2月$3日");
	return date;
}

//将时间戳转为日期
const dealTime = (e) =>{
   if(!e)return'';
   let dd = e+'';
   let date;
   if(dd.length == 10){
     let timestamp = Number(dd)
     date = new Date(parseInt(timestamp) * 1000);
   }else{
     let timestamp = Number(dd)
     date = new Date(parseInt(timestamp));
   }
   let Year = date.getFullYear();
   let Moth = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1);
   let Day = (date.getDate() < 10 ? '0' + date.getDate() : date.getDate());
   let Hour = (date.getHours() < 10 ? '0' + date.getHours() : date.getHours());
   let Minute = (date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes());
   let Sechond = (date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds());
   let  GMT =  Year + '-' + Moth + '-' + Day + '   '+ Hour +':'+ Minute  + ':' + Sechond;
   return GMT
 },

/*
*获取文件后缀
*/
const lastfile = (url) =>{
let file_name = url.match(/\.([^\.]+)$/)[1];//获取文件后缀
return file_name 
}
/**
*删除文件后缀
*/
const deleteFileLast = (url) =>{
	let aa = url.substring(0, url.lastIndexOf("."));//删除文件路径后缀
	return aa
}