Styles
Editor.js provides a set of CSS classes for common UI elements. They can be used to make the design of different Tools more consistent.
    ☝️
  
      
      Example
    
    
          block
         | 
              
          cdx-block
         | 
          
          inlineToolButton
         | 
              
          ce-inline-tool
         | 
          
          inlineToolButtonActive
         | 
              
          ce-inline-tool--active
         | 
          
Base class for Block Tool wrapper. Provides common margins and paddings between Blocks.
'cdx-block'
  Style of buttons for the Inline Toolbar.
'ce-inline-tool'
  
    
  Modifier for the active state of Inline Toolbar Button.
'ce-inline-tool--active'
  
    
  A common style for text inputs.
'cdx-input'
  
    
  
  You can set a placeholder for contenteditable element by adding a data-placeholder attribute:
<div contenteditable class="cdx-input" data-placeholder="Custom placeholder">
</div>
  Add this class to some element to show an animated loader placed over the element.
'cdx-loader'
  A common style for buttons.
'cdx-button'
  
    
  <div class="cdx-button">
  Button text
</div>