Method Provider

Namespace

Velvet

Assembly

Velvet.Docs.dll

Provider<T>(ComponentContext<T>, T, VNode?[]?, string?)

Provides a context value to the descendant subtree, visible to descendants that read the same context via Hooks.UseContext.

public static ContextProviderNode<T> Provider<T>(ComponentContext<T> context, T value, VNode?[]? children = null, string? key = null)

Parameters

context ComponentContext<T>

Context object whose value is being provided.

value T

Value visible to descendants via Hooks.UseContext(context).

children VNode[]

Descendant VNodes that observe this provider.

key string

Key used to disambiguate siblings at the same position.

Returns

ContextProviderNode<T>

The created ContextProviderNode<T>.

Type Parameters

T

Context value type.

Remarks

A value change reaches consumers by comparing this provider against the one that held the same position last render, and an unkeyed provider is identified by its own sibling index. That covers the ordinary cases, including a conditional sibling rendered as null, which keeps its slot. Give the provider an explicit key when the index itself can move — it follows a variable number of siblings, or is appended after a mapped list — so it stays identified across the shift. The key pins the provider's own place among its siblings, not the path above it: if an unkeyed fragment or component enclosing it is what moves, key the moving ancestor too.