js正则

• js字符串去除html标签

 str.replace(/<[^>]+>/g,"").trim()

• 字符串长度 汉字+2 字母+1

  strlen(str){  
    let len = 0;  
    for (let i=0; i<str.length; i++) {   
     let c = str.charCodeAt(i);   
    //单字节加1   
     if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {   
       len++;   
     }   
     else {   
      len+=2;   
     }   
    }   
    return len;  
} ,