Helper text below
helper-text-below
Helper text below for format/accepted values; bullets if several sentences; skip the period on helper and placeholder.
Description
Fluent helper text for format or accepted values sits below the field so the label stays the lasting name. When help needs several sentences, use bullets. Skip the period on helper and placeholder copy. Apply when adding format guidance under Fluent fields, not for post-submit validation messages. Fail helper above or missing when format help is needed, or several sentences as one block with end periods.
When to use
Adding Fluent helper or placeholder copy for format and accepted values.
Not when
Error validation copy after submit — that uses validation-message rules.
Agent hint
Place helper below; bullet multi-sentence help; omit the period on helper/placeholder.
Format/accepted-values helper sits below; several sentences use bullets; helper/placeholder omit the period.
Helper above/missing for needed format; several sentences as one block with end periods.
Citations
Fluent 2 — Field usage
https://fluent2.microsoft.design/components/web/react/core/field/usage