image-js/src/browser/environment.js

Image processing and manipulation in JavaScript

const env = 'browser';
const ImageData = self.ImageData;
const DOMImage = self.Image;

export function createCanvas(width, height) {
  let canvas = self.document.createElement('canvas');
  canvas.width = width;
  canvas.height = height;
  return canvas;
}

export function fetchBinary(url, { withCredentials = false } = {}) {
  return new Promise(function (resolve, reject) {
    let xhr = new self.XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = 'arraybuffer';
    xhr.withCredentials = withCredentials;

    xhr.onload = function (e) {
      if (this.status !== 200) reject(e);
      else resolve(this.response);
    };
    xhr.onerror = reject;
    xhr.send();
  });
}

export function createWriteStream() {
  throw new Error('createWriteStream does not exist in the browser');
}

export function writeFile() {
  throw new Error('writeFile does not exist in the browser');
}

export { env, ImageData, DOMImage };