Function createDOMPurify

src/purify.ts:119–1680

(window: WindowLike = getGlobal())

};

function createDOMPurify(window: WindowLike = getGlobal()): DOMPurify {
  const DOMPurify: DOMPurify = (root: WindowLike) => createDOMPurify(root);

  DOMPurify.version = VERSION;

  DOMPurify.removed = [];

  if (
    !window ||
    !window.document ||
    window.document.nodeType !== NODE_TYPE.document ||
    !window.Element
  ) {
    // Not running in a browser, provide a factory function
    // so that you can pass your own Window
    DOMPurify.isSupported = false;

    return DOMPurify;
  }

  let { document } = window;

  const originalDocument = document;
  const currentScript: HTMLScriptElement =
    originalDocument.currentScript as HTMLScriptElement;
  const {
    DocumentFragment,
    HTMLTemplateElement,
    Node,
    Element,
    NodeFilter,
    NamedNodeMap = window.NamedNodeMap || (window as any).MozNamedAttrMap,
    HTMLFormElement,
    DOMParser,
    trustedTypes,
  } = window;

  const ElementPrototype = Element.prototype;

  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
  const remove = lookupGetter(ElementPrototype, 'remove');
  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');

  // As per issue #47, the web-components registry is inherited by a
  // new document created via createHTMLDocument. As per the spec
  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
  // a new empty registry is used when creating a template contents owner
  // document, so we use that as our parent document to ensure nothing
  // is inherited.
  if (typeof HTMLTemplateElement === 'function') {
    const template = document.createElement('template');
    if (template.content && template.content.ownerDocument) {
      document = template.content.ownerDocument;
    }
  }