2_functions

dz / mdn / js / 1_javascript_building_blocks / 2_functions

Summary

Functions: Re-usable blocks of code

Node Tree

• functions
  • parameters
    • optional
    • default
      • default_ex
  • anonymous_funcs
    • arrow_funcs
      • one_line_return_omit_braces_return
      • one_param_omit_parens
      • arrow_notation_ex
  • built_in
  • custom
  • scope
    • function_scope
    • global
  • functions_vs_methods
  • invoke

Nodes

functions
content	functions
children	parameters, anonymous_funcs, built_in, custom, scope, functions_vs_methods, invoke

built_in
content	built-in
parents	functions

invoke
content	invoke: run or execute a function
parents	functions

functions_vs_methods
content	Functions vs Methods
parents	functions

custom
content	Custom
parents	functions

parameters
content	Parameters
children	optional, default
parents	functions

optional
content	Optional
parents	parameters

default
content	Default
children	default_ex (example)
parents	parameters

default_ex
content	hello(foo="bar")
parents	default

anonymous_funcs
content	Anonymous Functions
children	arrow_funcs
parents	functions

arrow_funcs
content	Arrow Functions
children	one_line_return_omit_braces_return, one_param_omit_parens, arrow_notation_ex (notation example)
parents	anonymous_funcs

one_param_omit_parens
content	Can omit parentheses if there is only one parameter
parents	arrow_funcs

arrow_notation_ex
content	instead of function(event), write (event) =>
parents	arrow_funcs

one_line_return_omit_braces_return
content	If only one line that's a return statement, can omit braces and return keyword
parents	arrow_funcs

scope
content	scope
children	function_scope, global
parents	functions

global
content	global
parents	scope

function_scope
content	Function Scope
parents	scope