js 16转10进制方法

十六进制转十进制

  function demo(hex) {
    // 传入"0d 7f", 翻转去除空格"0d7f",
    let str = hex.substring(2,4)+hex.substring(0,2);
    console.log("翻转的值:", hex);
    let decimalism = str.replace(/\s/g,"");
    console.log("去除空格: ", decimalism);
    let res = parseInt(decimalism, 16)/ 6553.5
    console.log("16转10的值: ", res);
    return res
  }
  demo('0d 7f')