Last updated: 2020-09-02

Checks: 7 0

Knit directory: r4ds_book/

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File Version Author Date Message
Rmd 7305596 sciencificity 2020-09-02 added new misc section

The web was built to allow humans to share content even though our computers are different from each other.

This is made possible by 3 different programming languages each doing a part of the job.


HTML marks up the content of a site.

  • It tells the users computer what things are.
  • It gives access to built in functionality of the browser that you can harness as a developer.
  • Its all declarations.
  • HTML can take a lot of abuse but still work.


CSS stands for Cascading Style Sheets

  • Provides visual styling and layout for everything on a web page.
  • Makes each page look the way it looks - colour, typography and size.
  • Can add simple interactions and animations through CSS.
  • If something goes wrong in CSS the browser will skip just that section of code and not apply that styling, but it will apply all the rest.


JavaScript is a programming language that provides the ability to create more powerful interactivity.

  • Most powerful
  • Used to make more interactive sites
  • Also most fragile - if something goes wrong / browser too old to know what the code means the browser will stop. It gives up. It does not guess what to do.

R version 3.6.3 (2020-02-29)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)

Matrix products: default

[1] LC_COLLATE=English_South Africa.1252  LC_CTYPE=English_South Africa.1252   
[3] LC_MONETARY=English_South Africa.1252 LC_NUMERIC=C                         
[5] LC_TIME=English_South Africa.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] workflowr_1.6.2

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.4.6    rprojroot_1.3-2 digest_0.6.25   later_1.0.0    
 [5] R6_2.4.1        backports_1.1.6 git2r_0.26.1    magrittr_1.5   
 [9] evaluate_0.14   stringi_1.4.6   rlang_0.4.7     fs_1.4.1       
[13] promises_1.1.0  whisker_0.4     rmarkdown_2.1   tools_3.6.3    
[17] stringr_1.4.0   glue_1.4.1      httpuv_1.5.2    xfun_0.13      
[21] yaml_2.2.1      compiler_3.6.3  htmltools_0.5.0 knitr_1.28