title: Block toolbar
The {@link module:ui/toolbar/block/blocktoolbar~BlockToolbar} plugin provides an additional configurable toolbar on the left-hand side of the content area (the gutter). The toolbar is represented by a button with a pilcrow (¶) and positioned next to the block element that the selection is anchored to (e.g. a paragraph), following the caret as the user edits the content and navigates the document.
Because the toolbar is always connected to the block of content, it naturally gives accommodation to the features which modify entire blocks (e.g. create headers, paragraphs) rather than inline styles (e.g. bold, italic, etc.).
Move the caret around to see the block toolbar button following the selection. Click the button to use the toolbar.
{@snippet features/blocktoolbar}
The content of toolbar can be defined using the {@link module:core/editor/editorconfig~EditorConfig#blockToolbar} configuration. See the installation instruction to learn more.
To adjust the position of the block toolbar button to match the styles of your website, use the CSS transform property:
.ck.ck-block-toolbar-button {
transform: translateX( -10px );
}
Remember to add proper features to the editor configuration first. The block toolbar provides a space for the buttons, it does not bring the actual features. For example: the `heading1` button will not work if there is no {@link features/headings Headings} feature in the editor.
To add this feature to your editor install the @ckeditor/ckeditor5-ui package:
npm install --save @ckeditor/ckeditor5-ui
And add it to your plugin list:
import BlockToolbar from '@ckeditor/ckeditor5-ui/src/toolbar/block/blocktoolbar';
import HeadingButtonsUI from '@ckeditor/ckeditor5-heading/src/headingbuttonsui';
import ParagraphButtonUI from '@ckeditor/ckeditor5-paragraph/src/paragraphbuttonui';
ClassicEditor
.create( document.querySelector( '#editor' ), {
plugins: [ BlockToolbar, ParagraphButtonUI, HeadingButtonsUI, ... ],
blockToolbar: [ 'paragraph', 'heading1', 'heading2', 'heading3', '|', 'bulletedList', 'numberedList' ]
toolbar: [ ... ]
} )
.then( ... )
.catch( ... );
Read more about {@link builds/guides/development/installing-plugins installing plugins}.
The source code of the feature is available on GitHub in https://github.com/ckeditor/ckeditor5-ui.