@wordpress/block-library/build-module/heading/autogenerate-anchors.js

Block library for the WordPress editor.

/**
 * External dependencies
 */
import removeAccents from 'remove-accents';
/**
 * Object map tracking anchors.
 *
 * @type {Record<string, string | null>}
 */

const anchors = {};
/**
 * Returns the text without markup.
 *
 * @param {string} text The text.
 *
 * @return {string} The text without markup.
 */

const getTextWithoutMarkup = text => {
  const dummyElement = document.createElement('div');
  dummyElement.innerHTML = text;
  return dummyElement.innerText;
};
/**
 * Get the slug from the content.
 *
 * @param {string} content The block content.
 *
 * @return {string} Returns the slug.
 */


const getSlug = content => {
  // Get the slug.
  return removeAccents(getTextWithoutMarkup(content)) // Convert anything that's not a letter or number to a hyphen.
  .replace(/[^\p{L}\p{N}]+/gu, '-') // Convert to lowercase
  .toLowerCase() // Remove any remaining leading or trailing hyphens.
  .replace(/(^-+)|(-+$)/g, '');
};
/**
 * Generate the anchor for a heading.
 *
 * @param {string} clientId The block ID.
 * @param {string} content  The block content.
 *
 * @return {string|null} Return the heading anchor.
 */


export const generateAnchor = (clientId, content) => {
  const slug = getSlug(content); // If slug is empty, then return null.
  // Returning null instead of an empty string allows us to check again when the content changes.

  if ('' === slug) {
    return null;
  }

  delete anchors[clientId];
  let anchor = slug;
  let i = 0; // If the anchor already exists in another heading, append -i.

  while (Object.values(anchors).includes(anchor)) {
    i += 1;
    anchor = slug + '-' + i;
  }

  return anchor;
};
/**
 * Set the anchor for a heading.
 *
 * @param {string}      clientId The block ID.
 * @param {string|null} anchor   The block anchor.
 */

export const setAnchor = (clientId, anchor) => {
  anchors[clientId] = anchor;
};
//# sourceMappingURL=autogenerate-anchors.js.map