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Advanced JavaScript techniques

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Rajasekharan Vengalil
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ADVANCED (MAYBE?) JAVASCRIPT TECHNIQUES Rajasekharan Vengalil bit.ly/avranju | @avranju Developer Evangelist Microsoft Corporation
My DEMO! super- duper eval console
FUNCTIONS Functions are first class citizens •Callbacks •call, apply •Context
OO IN JAVASCRIPT - CLASSES Designing classes •Member data & methods •Access control •A note on “new”
CLOSURES Closures •What are they? •Some use cases •Private members •Backing data for accessors
VARIABLE HOISTING & SCOPES Static typers beware! •Only functions form variable scope •Variables get “hoisted” •Declare everything at the top •Use immediate functions to limit scope of locals in global code
JAVASCRIPT OBJECT NOTATION (JSON) JSON •What is JSON? •Browser support for JSON •JSON-P
DEBUGGING Some pointers •IE developer tools •“debugger” keyword •“console.log” is your friend
Resources Some Links Read “JavaScript Patterns” by Stoyan Stefanov Eval Console Shameless Plug bit.ly/avranju rajave@microsoft.com  @avranju

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Advanced JavaScript techniques

  • 1. ADVANCED (MAYBE?) JAVASCRIPT TECHNIQUES Rajasekharan Vengalil bit.ly/avranju | @avranju Developer Evangelist Microsoft Corporation
  • 2. My DEMO! super- duper eval console
  • 3. FUNCTIONS Functions are first class citizens •Callbacks •call, apply •Context
  • 4. OO IN JAVASCRIPT - CLASSES Designing classes •Member data & methods •Access control •A note on “new”
  • 5. CLOSURES Closures •What are they? •Some use cases •Private members •Backing data for accessors
  • 6. VARIABLE HOISTING & SCOPES Static typers beware! •Only functions form variable scope •Variables get “hoisted” •Declare everything at the top •Use immediate functions to limit scope of locals in global code
  • 7. JAVASCRIPT OBJECT NOTATION (JSON) JSON •What is JSON? •Browser support for JSON •JSON-P
  • 8. DEBUGGING Some pointers •IE developer tools •“debugger” keyword •“console.log” is your friend
  • 9. Resources Some Links Read “JavaScript Patterns” by Stoyan Stefanov Eval Console Shameless Plug bit.ly/avranju rajave@microsoft.com  @avranju