How to Disable the Increase Indent Option in React Rich Text Editor When a Horizontal scrollbar Appears

This article demonstrates how to dynamically disable the ‘Increase Indent’ toolbar option in the Rich Text Editor when a horizontal scrollbar appears, enhancing the user experience by adapting the toolbar’s behavior to the content layout.

Rich Text Editor Configuration

Add the actionBegin event to the RichTextEditorComponent and assign a function to check for the scrollbar:

<RichTextEditorComponent
  id="toolsRTE"
  ref={(richtexteditor) => {
    editorRef = richtexteditor;
  }}
  value={rteValue}
  showCharCount={true}
  toolbarSettings={toolbarSettings}
  placeholder="Type something"
  actionBegin={checkScrollbar}
>

Disable Increase Indent When Horizontal Scrollbar Appears

Implement the checkScrollbar function to detect the presence of a horizontal scrollbar in the content area and disable the ‘Increase Indent’ option when applicable:

const checkScrollbar = () => {
  let div = editorRef.contentModule.contentPanel;
  if (div && div.scrollWidth > div.clientWidth) {
    alert('Horizontal scrollbar added!');
    editorRef.disableToolbarItem('Indent');
  }
};

The function calculates the content width (scrollWidth) and compares it with the visible width (clientWidth).
If the content exceeds the visible area (indicating a scrollbar is present), the disableToolbarItem method disables the ‘Increase Indent’ toolbar option.

Sample

You can test this functionality using the following sample application: StackBlitz Example.

By following these steps, you can effectively manage the toolbar options in your Rich Text Editor based on the content’s layout, enhancing user experience in your application.