testLockingAllEmbed.js

( function() {
	var registerBlockType = wp.blocks.registerBlockType;
	var el = wp.element.createElement;
	var InnerBlocks = wp.editor.InnerBlocks;
	var __ = wp.i18n.__;
	var TEMPLATE = [
		[ 'core/paragraph', { placeholder: 'Paragraph 1', customFontSize: 76 } ],
		[ 'core/embed' ],
	];

	registerBlockType( 'myplugin/test-locking-all', {
		title: 'Test Locking All',
		icon: 'cart',
		category: 'common',
		supports: {
			align: true,
		},

		edit: function( props ) {
			return el( 'div', { style: { outline: '1px solid gray', padding: 5, minWidth: 200 } },
				el(
					InnerBlocks,
					{
						template: TEMPLATE,
						templateLock: 'all',	
					}
				)
			);
		},

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