Blob.size

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

Blob.size 屬性回傳以 byte 為單位的 Blob 或一個 File 的大小。

語法

var sizeInBytes = blob.size

值

一個數字。

範例

js
// fileInput 是個 HTMLInputElement: <input type="file" multiple id="myfileinput">
var fileInput = document.getElementById("myfileinput");

// files 是個 FileList 物件 （類似 NodeList）
var files = fileInput.files;

for (var i = 0; i < files.length; i++) {
  console.log(files[i].name + " has a size of " + files[i].size + " Bytes");
}

規格

Specification
File API
# dfn-size

瀏覽器相容性

BCD tables only load in the browser

參見