Function: isHeading() 
isHeading(
state,level?):boolean
Defined in: packages/core/src/core/command/heading.ts:126
Check if the current selection is all headings of a specific level or paragraphs if level is 0.
Parameters 
state 
EditorState
EditorState
level? 
number
Heading level (1-6) or 0 for paragraphs, if undefined checks for any heading level (1-6)
Returns 
boolean
boolean