Remove a white background - sharp library

Question

Is it possible to replace a white background of an image with transparency using the sharp library?

Answer 1

You can use the unflatten command assuming you meet the following requirements:

Ensure the image has an alpha channel with all white pixel values made fully transparent. Existing alpha channel values for non-white pixels remain unchanged. This feature is experimental and the API may change.

sharp docs related to unflatten

for example:

await sharp("my_image.png").unflatten().toFile("my_image_transparent.png");