Method addTag

packages/platform-browser/src/browser/meta.ts:74–77

* Retrieves or creates a specific ` ` tag element in the current HTML document. * In searching for an existing tag, Angular attempts to match the `name` or `property` attribute * values in the provided tag definition, and verifies that all other attribute values are equal. * If an exis

(tag: MetaDefinition, forceCreation: boolean = false)

   * the new element if no match is found, or `null` if the tag parameter is not defined.
   */
  addTag(tag: MetaDefinition, forceCreation: boolean = false): HTMLMetaElement | null {
    if (!tag) return null;
    return this._getOrCreateElement(tag, forceCreation);
  }

  /**
   * Retrieves or creates a set of `<meta>` tag elements in the current HTML document.