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Javascript (Create Object (Create function (Exection environment (IIFE :…

- - - - IIFE : Immediately Invoke Function Expression,just add () behind function.
  - - - Every implement has its prototype
  - - - super
  - - - Simple call : direct call function
      - Object method : call in Object
      - Constructor method
- - - - Live in {}
    - - need ini value
      - can't change
      - can change reference's property
  - - - constructor create
      - apply,bind,call
  - - - shallow copy
      - treat as call by value
      - change like-array to array
    - - It's a real array.
      - like arguments in function,but not the same
        
        It can can Array.prototype
  - - - copy one by one
      - can set default value
    - - copy value by key
      - can change key name.
      - can set default value
  - - - forEach() : just simple show.
    - - filter() : filter you want match condition
      - map() : do something in original array,length must be the same as origin.
    - - find() : one answer matches condition
      - every() : all element(like and) in original array must match condition
      - some() : part element(like or)in original array must match condition.
      - reduce() : fix pre-fix data,then do the same thing continuously.
  - - - pending : initial statement
      - fulfilled : correctly done
      - rejected : something error
    - - resolve function
      - reject function
    - - catch() : if promise has an error,Promise Object invoke rejected function,then getting return error message.
      - race() : Every Promise invokes synchronously,but only one can invoke then().
      - all() : Every Promise invokes synchronously,and responding all promises.But,if one gets rejected statement,all statement get rejected.
      - then( ) : if promise no error,Promise Object invoke res function,then getting response function return data.
        
        chain : Using the feature returns Promise Object,we can call then()/catch() one by one.
      - Function returns a Promise Object?
    - - Fetch() : Asynchronously get remote data by internet(?)Link Title