Please follow the below instructions to fully integrate this into your chat.

1. Find the below NUI Callback:

RegisterNUICallback('chatResult', function(data, cb)
 chatInputActive = false
 SetNuiFocus(false)
 if not data.canceled then
   local id = PlayerId()
   local r, g, b = 0, 0x99, 255

   if data.message:sub(1, 1) == '/' then
     ExecuteCommand(data.message:sub(2))
   else
     TriggerServerEvent('_chat:messageEntered', GetPlayerName(id), { r, g, b }, data.message, data.mode)
   end
 end

 cb('ok')
end)

Replace it with:

RegisterNUICallback('chatResult', function(data, cb)
 chatInputActive = false
 SetNuiFocus(false)
 TriggerEvent("tiz-typing:input", false)
 if not data.canceled then
   local id = PlayerId()

   local r, g, b = 0, 0x99, 255

   if data.message:sub(1, 1) == '/' then
     ExecuteCommand(data.message:sub(2))
   else
     TriggerServerEvent('_chat:messageEntered', GetPlayerName(id), { r, g, b }, data.message, data.mode)
   end
 end

 cb('ok')
end)

2. Find the following thread:

Citizen.CreateThread(function()
 SetTextChatEnabled(false)
 SetNuiFocus(false)

 local lastChatHideState = -1
 local origChatHideState = -1

 while true do
   Wait(0)

   if not chatInputActive then
     if IsControlPressed(0, isRDR and `INPUT_MP_TEXT_CHAT_ALL` or 245) --[[ INPUT_MP_TEXT_CHAT_ALL ]] then
       chatInputActive = true
       chatInputActivating = true
       SendNUIMessage({
         type = 'ON_OPEN'
       })
     end
   end

   if chatInputActivating then
     if not IsControlPressed(0, isRDR and `INPUT_MP_TEXT_CHAT_ALL` or 245) then
       SetNuiFocus(true)
       chatInputActivating = false
     end
   end

   if chatLoaded then
     local forceHide = IsScreenFadedOut() or IsPauseMenuActive()
     local wasForceHide = false

     if chatHideState ~= CHAT_HIDE_STATES.ALWAYS_HIDE then
       if forceHide then
         origChatHideState = chatHideState
         chatHideState = CHAT_HIDE_STATES.ALWAYS_HIDE
       end
     elseif not forceHide and origChatHideState ~= -1 then
       chatHideState = origChatHideState
       origChatHideState = -1
       wasForceHide = true
     end

     if chatHideState ~= lastChatHideState then
       lastChatHideState = chatHideState

       SendNUIMessage({
         type = 'ON_SCREEN_STATE_CHANGE',
         hideState = chatHideState,
         fromUserInteraction = not forceHide and not isFirstHide and not wasForceHide
       })

       isFirstHide = false
     end
   end
 end
end)

Replace it with:

Citizen.CreateThread(function()
 SetTextChatEnabled(false)
 SetNuiFocus(false)

 local lastChatHideState = -1
 local origChatHideState = -1

 while true do
   Wait(0)

   if not chatInputActive then
     if IsControlPressed(0, isRDR and `INPUT_MP_TEXT_CHAT_ALL` or 245) --[[ INPUT_MP_TEXT_CHAT_ALL ]] then
       chatInputActive = true
       chatInputActivating = true
       TriggerEvent("tiz-typing:input", true)
       SendNUIMessage({
         type = 'ON_OPEN'
       })
     end
   end

   if chatInputActivating then
     if not IsControlPressed(0, isRDR and `INPUT_MP_TEXT_CHAT_ALL` or 245) then
       SetNuiFocus(true)
       TriggerEvent("tiz-typing:input", true)
       chatInputActivating = false
     end
   end

   if chatLoaded then
     local forceHide = IsScreenFadedOut() or IsPauseMenuActive()
     local wasForceHide = false

     if chatHideState ~= CHAT_HIDE_STATES.ALWAYS_HIDE then
       if forceHide then
         origChatHideState = chatHideState
         chatHideState = CHAT_HIDE_STATES.ALWAYS_HIDE
       end
     elseif not forceHide and origChatHideState ~= -1 then
       chatHideState = origChatHideState
       origChatHideState = -1
       wasForceHide = true
     end

     if chatHideState ~= lastChatHideState then
       lastChatHideState = chatHideState

       SendNUIMessage({
         type = 'ON_SCREEN_STATE_CHANGE',
         hideState = chatHideState,
         fromUserInteraction = not forceHide and not isFirstHide and not wasForceHide
       })

       isFirstHide = false
     end
   end
 end
end)