Method measureMutateElement

src/base-element.js:969–975

* Runs the specified measure, then runs the mutation on the element and * ensures that remeasures and layouts are performed for the affected * elements. * * This method should be called whenever a measure and significant mutations * are done on the DOM that could affect layout of elem

(measurer, mutator, opt_element)

   * @return {!Promise}
   */
  measureMutateElement(measurer, mutator, opt_element) {
    return Services.mutatorForDoc(this.getAmpDoc()).measureMutateElement(
      opt_element || this.element,
      measurer,
      mutator
    );
  }

  /**
   * Runs the specified mutation on the element. Will not cause remeasurements.