How to remove transparent pixels from all edges?

[obazna]

Hi,

I have PNG files that contain huge margins around the content, empty spaces that no one wants to see.
Is there any way to detect and trim transparent pixels from edges without using
raw() data? Unfortunately, I didn't find it. Thanks for the help in advance.

[lovell]

Hello, did you see the trim operation?

[obazna]

Thanks for your response, @lovell
The problem was in my code. I have already fixed it. trim works perfectly fine.

I had the following code:

// convert .SVG to .PNG
await sharp(input)            
            .resize(width, height)
            .png()
            .trim()
            .toFile(output);

Input .SVG file

Expected result

Actual result

The bottom and top was cutted more than I neded. Bad. But I didn't give up :)

I played with code and found a solution. Now it works as expected.

let buffer = await sharp(input)            
            .resize(width, height)            
            .png()            
            .toBuffer();

        await sharp(buffer)
            .trim()
            .toFile(output);