layout( scopeElement ) {

		// Autosize text with the r-fit-text class based on the
		// size of its container. This needs to happen after the
		// slide is visible in order to measure the text.
		Array.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {
			fitty( element, {
				minSize: 24,
				maxSize: this.Reveal.getConfig().height * 0.8,
				observeMutations: false,
				observeWindow: false
			} );
		} );

	}
Applies JS-dependent layout helpers for the scope.