pass stuff to json output

src/app/callbacks.jl

@@ -127,6 +127,7 @@ end
 function _callback!(func::Union{Function, ClientsideFunction, String}, app::DashApp, deps::CallbackDeps;
     prevent_initial_call = nothing,
     background = false,
+    interval = 1000,
     manager = nothing)
 
     check_callback(func, app, deps)
@@ -142,7 +143,8 @@ function _callback!(func::Union{Function, ClientsideFunction, String}, app::Dash
                 isnothing(prevent_initial_call) ?
                     get_setting(app, :prevent_initial_callbacks) :
                     prevent_initial_call,
-                background
+                background,
+                interval
             )
         )
 end

src/app/supporttypes.jl

@@ -112,7 +112,8 @@ struct Callback
     func ::Union{Function, ClientsideFunction}
     dependencies ::CallbackDeps
     prevent_initial_call ::Bool
-    background ::Bool
+    long ::Bool
+    interval ::Int
 end
 
 is_multi_out(cb::Callback) = cb.dependencies.multi_out == true

src/handler/state.jl

@@ -30,7 +30,8 @@ function _dependencies_json(app::DashApp)
             state = dependency_tuple.(callback.dependencies.state),
             output = output_string(callback.dependencies),
             clientside_function = _dep_clientside_func(callback.func),
-            prevent_initial_call = callback.prevent_initial_call
+            prevent_initial_call = callback.prevent_initial_call,
+            long = callback.long && (interval = callback.interval)
         )
     end
     return JSON3.write(result)

test/callbacks.jl

@@ -674,4 +674,5 @@ end
     request = HTTP.Request("GET", "/_dash-dependencies")
     resp = Dash.HttpHelpers.handle(handler, request)
     deps = JSON3.read(String(resp.body))
+    @test deps[1].long
 end