Vue Test Utils

FAQ

Vue warn: Failed setting prop 

[Vue warn]: Failed setting prop "prefix" on <component-stub>: value foo is invalid.
TypeError: Cannot set property prefix of #<Element> which has only a getter

This warning is shown in case you are using shallowMount or stubs with a property name that is shared with Element.

Common property names that are shared with Element:

  • attributes
  • children
  • prefix

See: https://developer.mozilla.org/en-US/docs/Web/API/Element

Possible solutions

  1. Use mount instead of shallowMount to render without stubs
  2. Ignore the warning by mocking console.warn
  3. Rename the prop to not clash with Element properties