Function simpleHash

packages/markmap-view/src/util.ts:66–72

(str: string)

 * Credit: https://gist.github.com/jlevy/c246006675becc446360a798e2b2d781?permalink_comment_id=4738050#gistcomment-4738050
 */
export function simpleHash(str: string) {
  let hash = 0;
  for (let i = 0; i < str.length; i++) {
    hash = ((hash << 5) - hash + str.charCodeAt(i)) | 0;
  }
  return (hash >>> 0).toString(36);
}

export function childSelector<T extends Element>(
  filter?: string | ((el: T) => boolean),