vue

Template references undefined property

Property.*was accessed during render but is not defined

Fixes

1.Declare the property in setup() return or data()
2.Check for typos in template variable names
3.Ensure the composable/store is properly imported and destructured

vuetemplatereactivity

Related Errors

Cannot read property of undefined in setup()

Cannot read propert(y|ies) of undefined.*setup

•Initialize reactive refs before accessing nested properties
•Add optional chaining (?.) when accessing potentially undefined objects

Computed property getter returns undefined

computed property.*getter.*undefined

•Ensure computed getter always returns a value
•Check that reactive dependencies are initialized before computed runs

Direct prop mutation warning

Avoid mutating a prop directly

•Use a local data/ref copy of the prop instead of mutating directly
•Emit an event to let the parent update the prop value