[mstijak]

Fixes #1333.

Problem

Passing an accessor chain to a field's help or label, or to LabeledContainer's label, crashed rendering with ins.scheduleExploreIfVisible is not a function:

<TextField value={m.name} label={m.caption} help={m.hint} />

Field and LabeledContainer decide whether help/label is a widget class by checking isComponentType. An accessor chain returns another accessor for every property read, so that check was truthy and the accessor was used as a widget type.

Change

Only isComponentType === true — the value Component sets on every widget class — now counts as a class, in Field (help, label) and LabeledContainer (label). Accessor chains fall through to the selector branch and become the text, like bind(...) already did. Passing a widget class, such as help={ValidationError}, is unchanged.

Tests

New Field.spec.tsx renders a TextField with an accessor label and help, and a LabeledContainer with an accessor label, and checks the text is rendered. All three failed with the crash before the change.

• yarn workspace cx run test: 538 passing, 2 pending, 0 failing
• yarn workspace cx run check-types: no errors