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.
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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 |