MVC Ideas & how global variables become local variables

MVC Ideas & how global variables become local variables 1 MVC thought

2. VC First Edition

   !function(){ var view = document.querySelector(‘xxx‘)var controller = function(view){    ..…   }controller.call(null,view)}.call()     

4. VC Second Edition, addinit

   !function(){  var view = document.querySelector(‘xxx‘)var controller = {view: null,init: function(view){    this.bindEvents().    //this.bindEvents().call(this)},bindEvents: function(){    ...… }}  controller.init(view).      //controller.init.call(controller,view)}.call()         

6. MVC idea full version

   !function(){  //M 数据相关的操作，负责和server数据交互var model = {  fetch: function(){            ...  },  save: function(){          ...  }}  //V 负责视图展示var view = document.querySelector(‘xxx‘)  //C 负责逻辑等其他var controller = {  view: null,  model: null,  init: function(view,model){    this.view = view    this.model = model    this.bindEvents()  },  bindEvents: function(){             ...  }  }  controller.init(view,model)}.call()

How do global variables in the 2 function become local variables?

1. Global variables will harass each other. So don't use global variables in your code. Only functions have global variables before ES6.

2. How does a global change to a local variable?
   • Put the surrogate-in a function like, and then. Call () Execute this function? Is that OK?
   • No way. The function name is also a global variable (global function).
   • So-drop the function name and turn the function into an anonymous function? Again function () {}.call () executes immediately, so it can, but chrome bugs, syntax error.
3. How to change local variables by global variables:
   • Method One:!function () {}.call ()
     (The front plus + 、-、! can, this method will change the function's return value, but do not care about the function of the return value of the addition of a reverse does not matter)
   • Method Two: (function () {}). Call ()
     (Enclose the function in parentheses.) However, this is not recommended, because if the previous line (function) is added to a xxx, it is easy to be misunderstood by the browser to be in XXX (). ）

MVC Ideas & how global variables become local variables