关于javascript:CRC32计算JavaScript实现代码

网上有的代码会计算出正数，有的不反对中文，这里整合了一下代码。

验证网站: https://www.lammertbies.nl/co...

function CRC32(str, radix = 10) {  const Utf8Encode = function(string) {    string = string.replace(/\r\n/g, "\n");    let text = "";    for (let n = 0; n < string.length; n++) {      const c = string.charCodeAt(n);      if (c < 128) {        text += String.fromCharCode(c);      } else if ((c > 127) && (c < 2048)) {        text += String.fromCharCode((c >> 6) | 192);        text += String.fromCharCode((c & 63) | 128);      } else {        text += String.fromCharCode((c >> 12) | 224);        text += String.fromCharCode(((c >> 6) & 63) | 128);        text += String.fromCharCode((c & 63) | 128);      }    }    return text;  }  const makeCRCTable = function(){    let c;    const crcTable = [];    for(let n =0; n < 256; n++){      c = n;      for(let k =0; k < 8; k++){        c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));      }      crcTable[n] = c;    }    return crcTable;  }  const crcTable = makeCRCTable();  const strUTF8 = Utf8Encode(str);  let crc = 0 ^ (-1);  for (let i = 0; i < strUTF8.length; i++ ) {    crc = (crc >>> 8) ^ crcTable[(crc ^ strUTF8.charCodeAt(i)) & 0xFF];  }  crc = (crc ^ (-1)) >>> 0;  return crc.toString(radix);};