Question

I’ve been working on improving my JavaScript code. I’ve seen several people write that too many people write JavaScript like another language such as C#. What common things I picked up in C# are things I should do differently in JavaScript?

Answer 1

There is an excellent (and award winning) article on JavaScript gotchas here:

http://www.codeproject.com/KB/scripting/javascript-gotchas.aspx

It covers:

• Double-equals
• Global variables
• Constructing built-in types with the ‘new’ keyword
• Constructing anything else without the ‘new’ keyword
• parseInt doesn’t assume base-10
• typeof operator
• instanceof operator
• The absence of data: null and undefined
• Redefining undefined
• this and inner functions
• No block scope
• String replace
• eval
• with
• Optional semicolons
• The “+” operator both adds and concatenates
• There is no Integer
• NaN

and more …