11 J

11.1 JavaScript

An object-oriented computer programming language commonly used to create interactive effects in web browsers.

JavaScript can be used to create dynamic effects in Shiny apps or R Markdown HTML documents.

W3Schools JavaScript Tutorial

11.2 joins

Ways to combine data from two tables

• binding joins:
  • bind_rows
  • bind_cols
• filtering joins:
  • anti_join
  • semi_join
• mutating joins:
  • left_join
  • right_join
  • inner_join
  • full_join

Resources

• Data Relations in Data Skills for Reproducible Science
• Relational Data in R for Data Science
• Cheatsheet for dplyr join functions

11.3 jQuery

A library that makes it easier to write JavaScript.

jQuery allows you to reference HTML elements in the same way that CSS works.

For example, the following code hides any level-2 headers with the class "extra".

$("h2.extra").hide();

R Markdown and Shiny apps use jQuery.

W3Schools jQuery Tutorial