useFieldContext

供 Field 内自定义控件使用的可选注入。内置控件（Input、Select、Checkbox、Switch）已消费此上下文。

用法

import { useFieldContext } from 'pomikit-ui'

const field = useFieldContext()
// null when not wrapped in Field

if (field) {
  field.setIntentError(message)
  // field.controlId, labelId, describedBy, required, label, resolvedError
  // claimFloatingLabel / releaseFloatingLabel for floating labels
}

Context 形状

type FieldContext = {
  controlId: ComputedRef<string>
  labelId: ComputedRef<string>
  describedBy: ComputedRef<string | undefined>
  required: ComputedRef<boolean>
  label: ComputedRef<string | undefined>
  resolvedError: ComputedRef<string | undefined>
  setIntentError: (message: string | undefined) => void
  claimFloatingLabel: () => void
  releaseFloatingLabel: () => void
  floatingLabelClaimed: Ref<boolean>
}

受控 Field error 优先于 setIntentError。意图错误用于控件自行发现的校验（例如 Input rules）。