Javascript sucks & frontend challenges @ClearSlide | while42 SF #7
-
Upload
while42 -
Category
Technology
-
view
671 -
download
2
description
Transcript of Javascript sucks & frontend challenges @ClearSlide | while42 SF #7
![Page 1: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/1.jpg)
while42 meetup
![Page 2: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/2.jpg)
JavaScript Sucks
How we deal with it
![Page 3: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/3.jpg)
About Me• Kyle Powers
![Page 4: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/4.jpg)
About Me• Kyle Powers• Enterprise Cloud Meteorologist
![Page 5: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/5.jpg)
About Me• Kyle Powers• Enterprise Cloud Meteorologist• Also work on javascript 99% of my time
![Page 6: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/6.jpg)
About Me• Kyle Powers• Enterprise Cloud Meteorologist• Also work on javascript 99% of my time• I like Sublime Text
![Page 7: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/7.jpg)
JavaScript Quiz
Based on Gary Bernhardt’s “Wat” talk
![Page 8: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/8.jpg)
![Page 9: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/9.jpg)
![Page 10: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/10.jpg)
WAT
![Page 11: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/11.jpg)
![Page 12: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/12.jpg)
![Page 13: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/13.jpg)
![Page 14: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/14.jpg)
WAT
![Page 15: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/15.jpg)
![Page 16: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/16.jpg)
![Page 17: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/17.jpg)
WAT
![Page 18: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/18.jpg)
![Page 19: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/19.jpg)
![Page 20: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/20.jpg)
WAT
![Page 21: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/21.jpg)
![Page 22: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/22.jpg)
![Page 23: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/23.jpg)
![Page 24: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/24.jpg)
![Page 25: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/25.jpg)
![Page 26: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/26.jpg)
![Page 27: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/27.jpg)
WAT
![Page 28: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/28.jpg)
![Page 29: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/29.jpg)
![Page 30: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/30.jpg)
WAT
![Page 31: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/31.jpg)
End Quiz• So how do we deal with this stuff?
![Page 32: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/32.jpg)
How do we deal with this stuff• Education
![Page 33: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/33.jpg)
How do we deal with this stuff• Education• Testing
![Page 34: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/34.jpg)
How do we deal with this stuff• Education• Testing• Chrome developer console
![Page 35: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/35.jpg)
Other bad things about JS• Leaving off the “var” keyword makes a
variable global.
![Page 36: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/36.jpg)
How we solve it• When referencing a global variable “foo”, we
specify “window.foo” to make it clear that it’s global
![Page 37: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/37.jpg)
Other bad things about JS• Callback hell
![Page 38: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/38.jpg)
![Page 39: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/39.jpg)
![Page 40: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/40.jpg)
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
![Page 41: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/41.jpg)
"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
![Page 42: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/42.jpg)
Other useful tools• type-check.js• http://gkz.github.io/type-check/
![Page 43: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/43.jpg)
![Page 44: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/44.jpg)
If all else fails, blame it on IE6
![Page 46: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/46.jpg)
![Page 47: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/47.jpg)
![Page 48: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/48.jpg)
![Page 49: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/49.jpg)
![Page 50: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/50.jpg)
![Page 51: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/51.jpg)
![Page 52: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/52.jpg)
![Page 53: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/53.jpg)
![Page 54: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/54.jpg)
![Page 55: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/55.jpg)
![Page 56: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/56.jpg)
![Page 57: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/57.jpg)
![Page 58: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/58.jpg)
![Page 59: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/59.jpg)
![Page 60: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/60.jpg)
![Page 61: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/61.jpg)
![Page 62: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/62.jpg)
![Page 63: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/63.jpg)
![Page 64: Javascript sucks & frontend challenges @ClearSlide | while42 SF #7](https://reader035.fdocuments.in/reader035/viewer/2022070304/54c2dec14a7959b7558b47c4/html5/thumbnails/64.jpg)