Method addElement

src/service/extensions-impl.js:336–342

* Add an element to the extension currently being registered. This is a * restricted method and it's allowed to be called only during the overall * extension registration. * @param {string} name * @param {typeof ../base-element.BaseElement} implementationClass * @param {?string|undefi

(name, implementationClass, css)

   * @restricted
   */
  addElement(name, implementationClass, css) {
    const holder = this.getCurrentExtensionHolder_(name);
    holder.extension.elements[name] = {implementationClass, css};
    this.addDocFactory((ampdoc) => {
      this.installElement_(ampdoc, name, implementationClass, css);
    });
  }

  /**
   * Add a template type to the extension currently being registered. This is a