testInneBlocksParagraph.js

( function() {
	var registerBlockType = wp.blocks.registerBlockType;
	var el = wp.element.createElement;
	var InnerBlocks = wp.editor.InnerBlocks;
	var __ = wp.i18n.__;
	var TEMPLATE = [
		[ 'core/paragraph', { fontSize: 'large', placeholder: 'Content…' } ],
	];

	registerBlockType( 'myplugin/test-inner', {
		title: 'Test InnerBlocks',
		icon: 'cart',
		category: 'common',
		attributes: {
			align: {
				type: 'string',
				default: 'wide',
			},
		},
		supports: {
			align: [ 'wide', 'full' ],
		},

		edit: function( props ) {
			return el( 'div', { style: { outline: '1px solid gray', padding: 5 } },
				el(
					InnerBlocks,
					{
						template: TEMPLATE,
						templateLock: false,	
					}
				)
			);
		},

		save: function() {
			return el( 'div', { style: { outline: '1px solid gray', padding: 5 } },
				el( InnerBlocks.Content )
			);
		},
	} );
} )();