Method displayExistingFile

src/dropzone.js:956–986

(
    mockFile,
    imageUrl,
    callback,
    crossOrigin,
    resizeThumbnail = true
  )

  // `callback` will be invoked when the image has been downloaded and displayed.
  // `crossOrigin` will be added to the `img` tag when accessing the file.
  displayExistingFile(
    mockFile,
    imageUrl,
    callback,
    crossOrigin,
    resizeThumbnail = true
  ) {
    this.emit("addedfile", mockFile);
    this.emit("complete", mockFile);

    if (!resizeThumbnail) {
      this.emit("thumbnail", mockFile, imageUrl);
      if (callback) callback();
    } else {
      let onDone = (thumbnail) => {
        this.emit("thumbnail", mockFile, thumbnail);
        if (callback) callback();
      };
      mockFile.dataURL = imageUrl;

      this.createThumbnailFromUrl(
        mockFile,
        this.options.thumbnailWidth,
        this.options.thumbnailHeight,
        this.options.thumbnailMethod,
        this.options.fixOrientation,
        onDone,
        crossOrigin
      );
    }
  }

  createThumbnailFromUrl(
    file,