trim-image

Remove transparent pixels from image borders

Installation

Install with npm:

npm install --save trim-image

Params

trimImage(filename, filenameOut [, cropInfo|callback [, callback]]);

trimImage(filename, filenameOut);
trimImage(filename, filenameOut, cropInfo);
trimImage(filename, filenameOut, callback);
trimImage(filename, filenameOut, cropInfo, callback);

Property	Necessary	Type	Plugin default value
filename	yes	string
filenameOut	yes	string
cropInfo	no	object	{ top: true, right: true, bottom: true, left: true }
callback	no	function	(err) => {}

More detailed explanation is below.

filename

The input filename

filenameOut

The output filename

cropInfo

Defines which sides will be cut. By default, all sides are started as true

callback

The callback function for async flow and error handle

Usage

Simple example

const trimImage   = require('trim-image');
const fs          = require('fs');
 
trimImage(`images/${filename}`, `out/${filename}`);

Complete example

const trimImage     = require('trim-image');
const fs            = require('fs');
const path          = require('path');
 
const allFilesSync = (dir, fileList = []) => {
  fs.readdirSync(dir).forEach(file => {
    const filePath = path.join(dir, file)
 
    fileList.push(
      fs.statSync(filePath).isDirectory()
        ? {[file]: allFilesSync(filePath)}
        : file
    )
  })
  return fileList
}
 
const images = allFilesSync('images/').filter((filename) => filename.match(/\.png$/));
 
images.forEach((filename) => {
    trimImage(`images/${filename}`, `out/${filename}`, { top: false, left: false }, (err) => {
        if (err) {
          console.log(err);
          return;
        }
    });
});