diff --git a/README.md b/README.md
index 3f3319c..5097677 100644
--- a/README.md
+++ b/README.md
@@ -36,10 +36,10 @@ lua <<EOF
 
     -- You must set mapping.
     mapping = {
-      ['<C-p>'] = cmp.mapping.item.prev(),
-      ['<C-n>'] = cmp.mapping.item.next(),
-      ['<C-d>'] = cmp.mapping.scroll.up(),
-      ['<C-f>'] = cmp.mapping.scroll.down(),
+      ['<C-p>'] = cmp.mapping.prev_item(),
+      ['<C-n>'] = cmp.mapping.next_item(),
+      ['<C-d>'] = cmp.mapping.scroll(-4),
+      ['<C-f>'] = cmp.mapping.scroll(4),
       ['<C-Space>'] = cmp.mapping.complete(),
       ['<C-e>'] = cmp.mapping.close(),
       ['<CR>'] = cmp.mapping.confirm({
@@ -84,10 +84,10 @@ cmp.setup {
     comparators = { ... },
   },
   mapping = {
-    ['<C-p>'] = cmp.mapping.item.prev(),
-    ['<C-n>'] = cmp.mapping.item.next(),
-    ['<C-d>'] = cmp.mapping.scroll.up(),
-    ['<C-f>'] = cmp.mapping.scroll.down(),
+    ['<C-p>'] = cmp.mapping.prev_item(),
+    ['<C-n>'] = cmp.mapping.next_item(),
+    ['<C-d>'] = cmp.mapping.scroll(-4),
+    ['<C-f>'] = cmp.mapping.scroll(4),
     ['<C-Space>'] = cmp.mapping.complete(),
     ['<C-e>'] = cmp.mapping.close(),
     ['<CR>'] = cmp.mapping.confirm({
@@ -106,13 +106,12 @@ Define mappings with `cmp.mapping` helper.
 
 The `cmp.mapping` helper has the below functions.
 
-*cmp.mapping.confirm({ select = true or false, behavior = cmp.ConfirmBehavior.Insert or cmp.ConfirmBehavior.Replace })*
-*cmp.mapping.complete()*
-*cmp.mapping.close()*
-*cmp.mapping.item.next()*
-*cmp.mapping.item.prev()*
-*cmp.mapping.scroll.up()*
-*cmp.mapping.scroll.down()*
+- *cmp.mapping.confirm({ select = true or false, behavior = cmp.ConfirmBehavior.Insert or cmp.ConfirmBehavior.Replace })*
+- *cmp.mapping.complete()*
+- *cmp.mapping.close()*
+- *cmp.mapping.next_item()*
+- *cmp.mapping.prev_item()*
+- *cmp.mapping.scroll(delta = number)*
 
 ### completion.autocomplete (type: cmp.TriggerEvent[])
 
diff --git a/lua/cmp/core.lua b/lua/cmp/core.lua
index 18bff2b..67efc0b 100644
--- a/lua/cmp/core.lua
+++ b/lua/cmp/core.lua
@@ -9,6 +9,7 @@ local misc = require('cmp.utils.misc')
 local config = require('cmp.config')
 local types = require('cmp.types')
 
+---@class cmp.Core
 local core = {}
 
 core.SOURCE_TIMEOUT = 500
@@ -71,48 +72,9 @@ end
 
 ---Keypress handler
 core.on_keymap = function(keys, fallback)
-  for key, c in pairs(config.get().mapping) do
+  for key, action in pairs(config.get().mapping) do
     if key == keys then
-      if c.type == 'confirm' then
-        local e = core.menu:get_selected_entry() or (c.select and core.menu:get_first_entry())
-        if e then
-          core.confirm(e, {
-            behavior = c.behavior,
-          }, function()
-            core.complete(core.get_context({ reason = types.cmp.ContextReason.TriggerOnly }))
-          end)
-          return
-        end
-      elseif c.type == 'complete' then
-        core.complete(core.get_context({ reason = types.cmp.ContextReason.Manual }))
-        return
-      elseif c.type == 'close' then
-        if vim.fn.pumvisible() == 1 then
-          core.reset()
-          return
-        end
-      elseif c.type == 'scroll.up' then
-        if core.menu.float:is_visible() then
-          core.menu.float:scroll(-c.delta)
-          return
-        end
-      elseif c.type == 'scroll.down' then
-        if core.menu.float:is_visible() then
-          core.menu.float:scroll(c.delta)
-          return
-        end
-      elseif c.type == 'item.next' then
-        if vim.fn.pumvisible() == 1 then
-          keymap.feedkeys('<C-n>', 'n')
-          return
-        end
-      elseif c.type == 'item.prev' then
-        if vim.fn.pumvisible() == 1 then
-          keymap.feedkeys('<C-p>', 'n')
-          return
-        end
-      end
-      return fallback()
+      return action(core, fallback)
     end
   end
 
diff --git a/lua/cmp/mapping.lua b/lua/cmp/mapping.lua
index f5a8133..372108e 100644
--- a/lua/cmp/mapping.lua
+++ b/lua/cmp/mapping.lua
@@ -2,58 +2,66 @@ local types = require('cmp.types')
 
 local mapping = {}
 
----Create complete mapping
 mapping.complete = function()
-  return {
-    type = 'complete',
-  }
+  return function(core)
+    core.complete(core.get_context({ reason = types.cmp.ContextReason.Manual }))
+  end
 end
 
----Create close mapping
 mapping.close = function()
-  return {
-    type = 'close',
-  }
+  return function(core, fallback)
+    if vim.fn.pumvisible() == 1 then
+      core.close()
+    else
+      fallback()
+    end
+  end
 end
 
----Create scroll mapping
-mapping.scroll = {
-  up = function(delta)
-    return {
-      type = 'scroll.up',
-      delta = delta or 4,
-    }
-  end,
-  down = function(delta)
-    return {
-      type = 'scroll.down',
-      delta = delta or 4,
-    }
-  end,
-}
+mapping.scroll = function(delta)
+  return function(core, fallback)
+    if core.menu.float:is_visible() then
+      core.menu.float:scroll(delta)
+    else
+      fallback()
+    end
+  end
+end
 
----Create item mapping
-mapping.item = {
-  prev = function()
-    return {
-      type = 'item.prev',
-    }
-  end,
-  next = function()
-    return {
-      type = 'item.next',
-    }
-  end,
-}
+mapping.next_item = function()
+  return function(_, fallback)
+    if vim.fn.pumvisible() == 1 then
+      vim.fn.feedkeys(vim.api.nvim_replace_termcodes('<C-n>', 'n'))
+    else
+      fallback()
+    end
+  end
+end
+
+mapping.prev_item = function()
+  return function(_, fallback)
+    if vim.fn.pumvisible() == 1 then
+      vim.fn.feedkeys(vim.api.nvim_replace_termcodes('<C-p>', 'n'))
+    else
+      fallback()
+    end
+  end
+end
 
----Create confirm mapping
 mapping.confirm = function(option)
   option = option or {}
-  return {
-    type = 'confirm',
-    select = option.select or false,
-    behavior = option.behavior or types.cmp.ConfirmBehavior.Insert,
-  }
+  return function(core, fallback)
+    local e = core.menu:get_selected_entry() or (option.select and core.menu:get_first_entry() or nil)
+    if e then
+      core.confirm(e, {
+        behavior = option.behavior,
+      }, function()
+        core.complete(core.get_context({ reason = types.cmp.ContextReason.TriggerOnly }))
+      end)
+    else
+      fallback()
+    end
+  end
 end
 
 return mapping
diff --git a/lua/cmp/types/cmp.lua b/lua/cmp/types/cmp.lua
index 334cca0..bf01e85 100644
--- a/lua/cmp/types/cmp.lua
+++ b/lua/cmp/types/cmp.lua
@@ -51,7 +51,7 @@ cmp.ScrollDirection.Down = 'down'
 ---@field public sorting cmp.SortingConfig
 ---@field public formatting cmp.FormattingConfig
 ---@field public snippet cmp.SnippetConfig
----@field public mapping table<string, cmp.MappingConfig>
+---@field public mapping table<string, fun(core: cmp.Core, fallback: function)>
 ---@field public sources cmp.SourceConfig[]
 
 ---@class cmp.CompletionConfig
@@ -83,34 +83,5 @@ cmp.ScrollDirection.Down = 'down'
 ---@field public name string
 ---@field public opts table
 
----@alias cmp.MappingConfig cmp.ConfirmMapping | cmp.CompleteMapping | cmp.CloseMapping | cmp.ItemNextMapping | cmp.ItemPrevMapping | cmp.ScrollUpMapping | cmp.ScrollDownMapping
-
----@class cmp.ConfirmMapping
----@field public type '"confirm"'
----@field public select boolean
----@field public behavior cmp.ConfirmBehavior
-
----@class cmp.CompleteMapping
----@field public type '"complete"'
-
----@class cmp.CloseMapping
----@field public type '"close"'
-
----@class cmp.ItemNextMapping
----@field public type '"item.next"'
----@field public delta number
-
----@class cmp.ItemPrevMapping
----@field public type '"item.prev"'
----@field public delta number
-
----@class cmp.ScrollUpMapping
----@field public type '"scroll.up"'
----@field public delta number
-
----@class cmp.ScrollDownMapping
----@field public type '"scroll.down"'
----@field public delta number
-
 return cmp