1. NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. Browser Development Tools by Rusty Keele Altair 8800 (1975) https://www.flickr.com/photos/mratzloff/9169309781/

2. Who This Presentation Is For Anyone who wants to learn about browser developer tools Basic knowledge of HTML, CSS and JavaScript is helpful Anyone interested in web programming People who are comfortable in their seats and don't want to leave Sinclair ZX Spectrum (1982) https://www.flickr.com/photos/alessandrogrussu/6959767634/

3. What We’ll Cover In This Presentation An overview of browser development tools Common and unique features Where to learn more “Celebrating Geek Culture” with photos of vintage micro- computers! Kaypro 1 (1986) with WordStar Template https://www.flickr.com/photos/andyi/5032041439/

4. About Me Started programming BASIC on a Commodore 64 in 1982! B.A. in Computer Science from Weber State University Full time web programmer for UEN – mostly PHP https://www.flickr.com/photos/shaniber/3027057973 Commodore 64 (1982)

5. NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. An Introduction To The Tools Apple IIe (1983) https://www.flickr.com/photos/debagel/5902534055/

6. What Are Browser Development Tools? A suite of tools for web programmers Display in a browser window Built in to most modern web browsers We’ll discuss Firefox, Chrome, Internet Explorer and Safari We’ll talk about desktop browsers only – mobile browser tools are different Can also be browser plug-ins

7. What Do They Look Like? FirefoxChrome

8. Who Are They For? Web developers and programmers But some tools are helpful for non-programmers: Network: see how long it takes items to load Console: see error messages Responsive design mode: see how your site looks on different devices If you want to see what a specific site is doing!

9. How To Open The Tools Keyboard ShortcutMenu BarContext Menu FirefoxCtrl + Shift + iF10 > Tools > Web Developer > Toggle tools Right-click > Inspect element ChromeCtrl + Shift + iCustomize icon > More tools > Developer tools Right-click > Inspect element Internet ExplorerF12Tools > F12 Developer tools Right-click > Inspect element * SafariCommand-Option-IDevelop menuControl-click > Inspect Element * Safari tools musts be enabled first: click "Show Develop menu in menu bar" setting in Safari's preferences under the Advanced pane.

10. Try It Yourself! Open one of these browsers on your computer Mozilla’s test page: http://go.uen.org/3Sshttp://go.uen.org/3Ss Open the developer tools and follow along!

11. NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. Common Utilities In All Browsers Compaq Portable (1982) https://www.flickr.com/photos/michaelrogers/3900975898/

12. The Explorer / Inspector View HTML Inspect the Document Object Model (DOM) See Cascading Style Sheets (CSS) Edit CSS in real-time Internet Explorer 11: DOM Explorer

13. The Console View JavaScript See errors, warnings and messages Edit JavaScript in real-time Firefox: Console

14. The Network Monitor See all the network requests your browser is making Images Scripts Styles Ads View details for: Raw headers and responses Cookies Load times Security Chrome: Network Tab

15. The Debugger Allows you to debug JavaScript code You can step through the code to examine or modify it Set breakpoints See variable values Internet Explorer 11: Debugger

16. The Profiler / Performance Tool View your site’s responsiveness Create profiles A record of what the site is doing Save and export profiles Firefox: Performance Tab

17. NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. Unique Features For Specific Browsers Radio Shack TRS-80 (1977) https://www.flickr.com/photos/eevblog/14577631278/

18. Internet Explorer 11 Emulation tab Mode: can emulate IE 5, 7, 8, 9, 10 and Edge (11) Display: landscape and portrait views for different screen sizes / devices Geolocation Profile memory usage and UI responsiveness The Help icon (?) or F1 https://msdn.microsoft.com/en- us/library/bg182326%28v=vs.85%29.as px https://msdn.microsoft.com/en- us/library/bg182326%28v=vs.85%29.as px

19. Firefox 38 Responsive Design Mode: test different screen sizes Dock options: where to show your browser tools Toolbox Options: change the appearance of your browser tools Style Editor tab: edit and save external CSS files https://developer.mozilla.org/en- US/docs/Tools https://developer.mozilla.org/en- US/docs/Tools

20. Google Chrome 43 Audits: suggestions to improve your code Device mode: show screen sizes for specific devices throttle network speeds Resources: view fonts, images and storage https://developer.chrome.com/ devtools https://developer.chrome.com/ devtools

21. Safari 8 Activity View Bar: See at-a-glance summary of key information Layers, Styles, Nodes: See detailed information about each element https://developer.apple.com/lib rary/safari/documentation/App leApplications/Conceptual/Safar i_Developer_Guide/Introduction /Introduction.html https://developer.apple.com/lib rary/safari/documentation/App leApplications/Conceptual/Safar i_Developer_Guide/Introduction /Introduction.html

22. NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. Wrapping Up Atari 800 (1979) https://www.flickr.com/photos/mratzloff/9171555638/

23. Where To Learn More Browser specific documentation (see previous links) A good web site: http://devtoolsecrets.com/http://devtoolsecrets.com/ Mozilla Developer Network: https://developer.mozilla.org/en- US/docs/Toolshttps://developer.mozilla.org/en- US/docs/Tools Info about several topics - and many have videos! Some books on Amazon.com - mostly browser specific

24. The End You can get these slides at http://c64sets.com/slides/ http://c64sets.com/slides/ rkeele@uen.org Rate this talk (thumbs up or thumbs down on the Tech Summit schedule page) Images from Flickr.com (all have creative commons license) Vintage computer info from http://oldcomputers.net/ http://oldcomputers.net/ IBM PC (1981) https://www.flickr.com/photos/76300039@N02/12840558153/