Custom content type

@artf Instead of using plugins js files, can we create our own content using html as I have done below. Is it a correct way to do it?

 {
        appendTo: '#blocks',
        blocks: [
          {
            id: 'text',
            label: 'List',
            attributes: {class: 'fa fa-list-alt'},
            content: '<div data-gjs-type="text" data-highlightable="1"><ul><li>List 1</li><li>List 2</li><li>List 3</li></ul></div>',
            activate: true,
            category: 'Standard UI Elements'
          },

Sorry for the formatting unable to format.. Thanks in advance.