FAQ

Q: How can I reference existing objects on canvas?

A: canvas.getObjects() returns an array of all objects on canvas; canvas.item(n) returns n-th object on canvas (where indexing is associated with z-order)

Q: How can I change object's properties?

A: Using fabric.Object#set method (e.g.: rect.set('width', 100).set('height', 50) or rect.set({ width: 100, height: 50 }))