docs(lsp): add supports_method to vim.lsp.client docs (#26852)

2 files changed, 10 insertions, 0 deletions

diff --git a/runtime/doc/lsp.txt b/runtime/doc/lsp.txt
index d53a7b4c11..bbf19f9569 100644
--- a/runtime/doc/lsp.txt
+++ b/runtime/doc/lsp.txt
@@ -745,6 +745,10 @@ client()                                                      *vim.lsp.client*
         client is fully stopped.
       • on_attach(client, bufnr) Runs the on_attach function from the client's
         config if it was defined. Useful for buffer-local setup.
+      • supports_method(method, [opts]): boolean Checks if a client supports a
+        given method. Always returns true for unknown off-spec methods. [opts]
+        is a optional `{bufnr?: integer}` table. Some language server
+        capabilities can be file specific.
 
     • Members
       • {id} (number): The id allocated to the client.
diff --git a/runtime/lua/vim/lsp.lua b/runtime/lua/vim/lsp.lua
index 3105413b53..27c5f7ce7b 100644
--- a/runtime/lua/vim/lsp.lua
+++ b/runtime/lua/vim/lsp.lua
@@ -425,6 +425,12 @@ end
 ---     Runs the on_attach function from the client's config if it was defined.
 ---     Useful for buffer-local setup.
 ---
+---  - supports_method(method, [opts]): boolean
+---     Checks if a client supports a given method.
+---     Always returns true for unknown off-spec methods.
+---     [opts] is a optional `{bufnr?: integer}` table.
+---     Some language server capabilities can be file specific.
+---
 --- - Members
 ---  - {id} (number): The id allocated to the client.
 ---