Merge pull request #1199 from rvilarl/fix/531

Requirement to SetStave before rendering documented (fixes 531)

src/textnote.ts

@@ -25,6 +25,7 @@ export interface TextNoteStruct extends NoteStruct {
 /**
  * `TextNote` is a notation element that is positioned in time. Generally
  * meant for objects that sit above/below the staff and inline with each other.
+ * `TextNote` has to be assigned to a `Stave` before rendering by means of `SetStave`.
  * Examples of this would be such as dynamics, lyrics, chord changes, etc.
  */
 export class TextNote extends Note {
@@ -179,7 +180,10 @@ export class TextNote extends Note {
     this.setPreFormatted(true);
   }
 
-  /** Renders the TextNote. */
+  /**
+   * Renders the TextNote.
+   * `TextNote` has to be assigned to a `Stave` before rendering by means of `SetStave`.
+   */
   draw(): void {
     const ctx = this.checkContext();
     const stave = this.checkStave();