JavaScript: Replace an existing file

Replaces an existing file at the specified path with a new one.

Parameters

• path

  (Required)

  The relative file path. Should be of the format `folder/subfolder/filename.png`. The bucket must already exist before attempting to update.

• fileBody

  (Required)

  The body of the file to be stored in the bucket.

• fileOptions

  (Optional)

  Optional file upload options including cacheControl, contentType, and metadata. **Note:** The `upsert` option has no effect here. `update()` always replaces the file at the given path, so the `x-upsert` header is not sent. To control upsert behavior, use `upload()` instead.