@wordpress/blocks/build-module/api/raw-handling/image-corrector.js

Block API for WordPress.

/* wp:polyfill */
/**
 * WordPress dependencies
 */
import { createBlobURL } from '@wordpress/blob';
export default function imageCorrector(node) {
  if (node.nodeName !== 'IMG') {
    return;
  }
  if (node.src.indexOf('file:') === 0) {
    node.src = '';
  }

  // This piece cannot be tested outside a browser env.
  if (node.src.indexOf('data:') === 0) {
    const [properties, data] = node.src.split(',');
    const [type] = properties.slice(5).split(';');
    if (!data || !type) {
      node.src = '';
      return;
    }
    let decoded;

    // Can throw DOMException!
    try {
      decoded = atob(data);
    } catch (e) {
      node.src = '';
      return;
    }
    const uint8Array = new Uint8Array(decoded.length);
    for (let i = 0; i < uint8Array.length; i++) {
      uint8Array[i] = decoded.charCodeAt(i);
    }
    const name = type.replace('/', '.');
    const file = new window.File([uint8Array], name, {
      type
    });
    node.src = createBlobURL(file);
  }

  // Remove trackers and hardly visible images.
  if (node.height === 1 || node.width === 1) {
    node.parentNode.removeChild(node);
  }
}
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