Javascript sucks & frontend challenges @ClearSlide | while42 SF #7

while42 meetup

JavaScript Sucks

How we deal with it

About Me• Kyle Powers

About Me• Kyle Powers• Enterprise Cloud Meteorologist

About Me• Kyle Powers• Enterprise Cloud Meteorologist• Also work on javascript 99% of my time

About Me• Kyle Powers• Enterprise Cloud Meteorologist• Also work on javascript 99% of my time• I like Sublime Text

JavaScript Quiz

Based on Gary Bernhardt’s “Wat” talk

WAT

WAT

WAT

WAT

WAT

WAT

End Quiz• So how do we deal with this stuff?

How do we deal with this stuff• Education

How do we deal with this stuff• Education• Testing

How do we deal with this stuff• Education• Testing• Chrome developer console

Other bad things about JS• Leaving off the “var” keyword makes a

variable global.

How we solve it• When referencing a global variable “foo”, we

specify “window.foo” to make it clear that it’s global

Other bad things about JS• Callback hell

How we solve it• Refactor – name functions outside of the

scope• Keep functions shallow – usually no more than

2 levels deep• Use the module pattern

"Write small modules that each do one thing, and assemble them into other modules that do a bigger thing. You can't get into callback hell if you don't go there.”

-Isaac Schlueter

Other useful tools• type-check.js• http://gkz.github.io/type-check/

If all else fails, blame it on IE6

Thanks

p.s. we’re hiringkyle@clearslide.com

@mfkp