A List Apart: Articles: Getting Out of Binding Situations in JavaScript - The Diigo Meta page

• 22 Jun 17
  

  Lawrence Lagerlof

  pocket backup public

• 15 Oct 12
  

  ireiter

  javascript binding scope oop

• 08 Oct 12
  

  cnherald

  javascript binding

• 29 Sep 12
  

  Eugene Safronov

  javascript binding

• 09 Sep 12
  

  Fahim Farook

  So how do we fix it? We bind explicitly—that is, we explicitly state to what this will point to within the method when it gets called. And how do we do that? JavaScript provides us with two options: apply and call.

  javascript binding

• 31 Aug 12
  

  Mudit A

  javascript advancedJavascript javascriptBinding javascriptCaveats

• 02 Jun 12
  

  L T

  binding javascript

• 16 May 12
  

  sudhirp

  javascript this self that

• 07 Apr 12
  

  Vasileios Fasoulas

  javascript

• 08 Feb 12
  

  Chris Markle

  programming javascript webdev

• 16 Jan 12
  

  Zach Wise

  alistapart javascript

• 06 Nov 11
  

  Sam Kitonyi

  javascript programming tutorial gotcha

• 27 Sep 11
  

  amit_e

  ing—something I’ll refer to as “binding loss.” It happens whenever you’re accessing a method through a reference instead of directly through its owner object. The method loses its implicit binding, and this stops referencing its owner object and goes back to its default value, which in this case is window (so if window had a name property by th

  javascript binding

• 17 Sep 11
  

  Stephen Calnan

  Illuminating article on Javascript scope mechanics.

  javascript programming

• 14 Sep 11
  

  Jeff Cooper

  javascript

• 12 Sep 11
  

  stormwild

  tutorial javascript binding apply call

• 07 Apr 11
  

  Gerrit Vicin

  javascript binding programming

• 25 Mar 11
  

  javascript programming

• 25 Nov 10
  

  Viktor Szűcs

  Nagyon jól elmagyarázza az egyik legfontosabb és nehezen felismerhető problémát javascriptben, amire egyszerűen csak "binding loss"-ként hivatkozik. Aki javascriptben dolgozik, ill. valamilyen js library-t használ, mindenképp olvassa el ezt a cikket, főleg, ha mélységeiben szeretné megismerni a problémát és nem elégszik meg a felületes magyarázatokkal.

  binding bind javascript bug prototype

• 24 Sep 10
  

  David Orick

  A List Apart: Articles: Getting Out of Binding Situations in JavaScript

  Javascript

• 29 Apr 10
  

  Marg Wilkinson

  Most developers don’t know about—or don’t care enough about—binding in JavaScript. Yet this single issue is responsible for a sizeable portion of the questions

  javascript binding tutorials

• 01 Mar 10
  

  tomas corral
• 21 Oct 09
  

  Ethan Gardner

  Most developers dont know aboutor dont care enough aboutbinding in JavaScript. Yet this single issue is responsible for a sizeable portion of the questions on most JavaScript-related support channels, and thousandsif not millionsof hairs being tortured aw

  javascript bind del.icio.us

• 08 Jun 09
  

  Renato Albano

  js javascript static binding events

• 06 Apr 09
  

  Sam Goody

  Scripting Workarounds _ Snippets (js_css) Binding

• 15 Mar 09
  

  Matt Gibson

  javascript this binding useful article programming

• 04 Mar 09
  

  Attila Györffy

  Most developers don’t know about—or don’t care enough about—binding in JavaScript. Yet this single issue is responsible for a sizeable portion of the questions on most JavaScript-related support channels, and thousands—if not millions—of hairs being tortu

  javascript

• 28 Oct 08
  

  you huang

  javascript

• 29 Sep 08
  

  Fiji Siv

  javascript dev

• 19 Aug 08
  

  javascript

• 04 Aug 08
  

  Rubayeet Islam

  javascript programming

• 31 Jul 08
  

  Navneet Kumar

  biding in javascript

  Javascript JavaScript

• 

  Lance England

  programming javascript binding

• 22 Jul 08
  

  Securicy Ventures

  PHP Java OOP

• 17 Jul 08
  

  dan

  OH, at last, someone enumerating "this" in a way that doesn't boil don to 'just check it in firebug'

  javascript oop phm @todo

• 15 Jul 08
  

  kabs

  javascript binding programming

• 13 Jul 08
  

  D. Elmo Peele

  javascript binding programming tutorial development oop scope

• 12 Jul 08
  

  Brian B

  javascript alistapart webdev

• 10 Jul 08
  

  rampion

  articles javascript bind call functions scope

• 

  Marcos Fernández

  javascript oop prototype development

• 

  javascript tutorial binding

• 08 Jul 08
  

  John Armstrong-Prior

  closures javascript binding oop scope tutorial

• 

  Nathan Gibbons

  javascript binding this

• 07 Jul 08
  

  Duncan Greenhill

  Javascript aListApart article binding howto

• 06 Jul 08
  

  giuliano riccio

  javascript binding tutorial

• 

  Adam B

  javascript binding

• 05 Jul 08
  

  alexeydemidov

  javascript binding programming development

• 04 Jul 08
  

  John Mackin

  javascript webdev

• 

  Kenneth Priisholm

  Most developers don’t know about—or don’t care enough about—binding in JavaScript...

  development javascript oop for:mikaelmoller

• 

  Kai Lautaportti

  webdevelopment javascript

• 03 Jul 08
  

  Stuart H

  javascript binding programming tutorial jquery prototype reference

• 

  Oncle Tom

  Explication sur les passages de paramètres par référence en JavaScript (binding). Ou comment utiliser apply et call pour éviter de se perdre dans des "this" invalides.

  javascript binding oop scope alistapart development code howto clevermarks for:meatshake

• 

  Tim Lossen

  "Most developers don’t know about—or don’t care enough about—binding in JavaScript. Yet this single issue is responsible for a sizeable portion of the questions on most JavaScript-related support channels ..."

  javascript tutorials

• 

  wctang

  javascript toread

• 

  ed talmadge

  _study

• 

  AJ Woods

  javascript

• 02 Jul 08
  

  Sean O'Halpin

  javascript binding

• 

  Marius Gundersen

  javascript binding programming oop scope closures

• 

  a a

  binding javascript dev

• 

  petevg

  javascript howto article ajax code Tutorials useful programming

• 

  javascript ajax programming tutorial jQuery Prototype ExtJS

• 

  Steve Cho

  javascript binding programming oop

• 

  jason kneip

  alistapart javascript

• 

  Sam Carrington

  ajax javascript reference programming tutorial binding scope oop development howto

• 

  alphatesla

  Bookmarks javascript binding programming tutorial oop development scope

• 

  Frederik Van Zande

  Most developers don’t know about—or don’t care enough about—binding in JavaScript. Yet this single issue is responsible for a sizeable portion of the questions on most JavaScript-related support channels, and thousands—if not millions—of hairs being tortured away from developer heads every single day. Yet with a little attention to this oft-overlooked subject, you can avoid wasting your time, energy, and patience and move on to more powerful, efficient scripting.

  javascript binding best practice

• 

  Elad Ossadon

  javascript this beginners

• 

  Mr. DiGi

  javascript programming tutorial

  • In short, for most OOP languages, binding is implicit. This is true in Java, C#, Ruby, Delphi, and C++
  • PHP and JavaScript do require you to explicitly state which object you’re accessing, even if it’s the current one
  • This is the single most important issue with JavaScript binding—something I’ll refer to as “binding loss.” It happens whenever you’re accessing a method through a reference instead of directly through its owner object
  • The method loses its implicit binding, and this stops referencing its owner object and goes back to its default value, which in this case is window
  • Binding-sensitive code patterns
  • Every JavaScript function is equipped with an apply method that allows you to call that function with specific binding (a specific this, if you will). It takes two arguments: the binding object, and an array of the arguments to be passed to the function
  • When you do know exactly which arguments you want to pass, call may feel nicer, as it takes the arguments themselves, not an array of them
  • The only way to achieve this requires us to wrap our original method in another one, that will perform the apply call
  • That function, when called, will take our original method and invoke apply on it, passing: 
     
    1. the original object’s binding (the variable named object), and
     
    2. whatever arguments were provided at call time, as an array
  • JavaScript frameworks do it
  • var that = this
  • that.
  • This code uses a language feature called “lexical closure.” In short, closures let code at point A access identifiers declared in scopes surrounding A
  • • Any member access must be qualified with the object it pertains to, even when it is this.
     
    • Any sort of function reference (assigning as a value, passing as an argument) loses the function’s original binding.
     
    • JavaScript provides two equivalent ways of explicitly specifying a function’s binding when calling it: apply and call.
     
    • Creating a “bound method reference” requires an anonymous wrapper function, and a calling cost. In specific situations, leveraging closures may be a better alternative.

  12 more annotations...

• 

  rob_cornelius

  javascript programming scope oop

• 

  Jeremy James

  article javascript programming

• 

  Travis B Hartwell

  javascript binding programming

• 

  Michael C. Harris

  # Any member access must be qualified with the object it pertains to, even when it is this.
  # Any sort of function reference (assigning as a value, passing as an argument) loses the function’s original binding.
  # JavaScript provides two equivalent ways of explicitly specifying a function’s binding when calling it: apply and call.
  # Creating a “bound method reference” requires an anonymous wrapper function, and a calling cost. In specific situations, leveraging closures may be a better alternative.

  javascript programming binding

Would you like to comment?

Join Diigo for a free account, or sign in if you are already a member.