Bytes 智能转换为 KB， MB，GB

Posted on 2011/04/18 by mozillazg

本文参考了 http://otnv.pixnet.net/blog/post/29073136

代码：

function readablizeBytes(bytes) {
    var s = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
    var e = Math.floor(Math.log(bytes)/Math.log(1024));
    return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];
}

用法：

readablizeBytes(8589312); // return 8.19 MB

实例：
Firefox 扩展 DiB 的功能如下：
DiB1
可以看出此扩展是以 Bytes 为单位的，不够友好。现在用本文的代码对源代码进行改动，达到文件大小智能显示的效果：
DiB2
只须改动文件扩展\chrome\content\overlay.js 即可
改动前：

var showDialogAddonDiB =
{
  init: function()
  {
    if ("contentLength" in dialog.mLauncher)
    {
      var bytes = dialog.mLauncher.contentLength;
      var type = dialog.dialogElement("type");
      if (bytes != -1)
      {
        type.value += " (" + bytes.toLocaleString() + " Bytes)";
        type.setAttribute("tooltiptext", type.value);
      }
    }
  }
};
dialog.mDialog.addEventListener("load", function() { showDialogAddonDiB.init(); }, false);

改动后：

var showDialogAddonDiB =
{
  init: function()
  {
    if ("contentLength" in dialog.mLauncher)
    {
      var bytes = dialog.mLauncher.contentLength;
      var type = dialog.dialogElement("type");
      if (bytes != -1)
      {
        type.value += " ( " + readablizeBytes(bytes).toLocaleString() + " )";
        type.setAttribute("tooltiptext", type.value);
      }
    }

    function readablizeBytes(bytes) {
        var s = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
        var e = Math.floor(Math.log(bytes)/Math.log(1024));
        return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];
    }
  }

};
dialog.mDialog.addEventListener("load", function() { showDialogAddonDiB.init(); }, false);

[JavaScript]Bytes 智能转换为 KB， MB，GB

Posted on 2011/04/18 by mozillazg

本文参考了 http://otnv.pixnet.net/blog/post/29073136

代码：

function readablizeBytes(bytes) {
    var s = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
    var e = Math.floor(Math.log(bytes)/Math.log(1024));
    return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];
}

用法：

readablizeBytes(8589312); // return 8.19 MB

var showDialogAddonDiB =
{
  init: function()
  {
    if ("contentLength" in dialog.mLauncher)
    {
      var bytes = dialog.mLauncher.contentLength;
      var type = dialog.dialogElement("type");
      if (bytes != -1)
      {
        type.value += " (" + bytes.toLocaleString() + " Bytes)";
        type.setAttribute("tooltiptext", type.value);
      }
    }
  }
};
dialog.mDialog.addEventListener("load", function() { showDialogAddonDiB.init(); }, false);

改动后：

var showDialogAddonDiB =
{
  init: function()
  {
    if ("contentLength" in dialog.mLauncher)
    {
      var bytes = dialog.mLauncher.contentLength;
      var type = dialog.dialogElement("type");
      if (bytes != -1)
      {
        type.value += " ( " + readablizeBytes(bytes).toLocaleString() + " )";
        type.setAttribute("tooltiptext", type.value);
      }
    }

    function readablizeBytes(bytes) {
        var s = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
        var e = Math.floor(Math.log(bytes)/Math.log(1024));
        return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];
    }
  }

};
dialog.mDialog.addEventListener("load", function() { showDialogAddonDiB.init(); }, false);