All the code we have been writing so far is Javascript code! Javascript is the #1 most used programming language in the world. It is the only language that works in web browsers.
While the code we are writing is Javascript a large portion of the code has been written for you. For example, all the shape functions you have been using so far were written by someone else in what is called a "library."
library A collection of code written by someone else.
The library is called p5.js which stands for Processing version 5 Javascript edition, or p5js for short. The creators of p5js have also created documentation and guides covering all the different functions you can use and how to use them!
Here are a few of the functions taken from the documentation
Shapes
rect(x, y, w, h) draw a rectangle
ellipse(x, y, w, h) draw a circle or oval
triangle(x1, y1, x2, y2, x3, y3) draw a triangle
line(x1, y1, x2, y2) draw a line
point(x, y) draw a single dot
arc(x, y, w, h, start, stop) draw an arc shape
bezier(x1, y1, cx1, cy1, cx2, cy2, x2, y2) draw a bendy line
quad(x1, y1, x2, y2, x3, y3, x4, y4) draw a square by controlling each corner position
Colors
background(r, g, b) Set the background color
fill(r, g, b) Set the fill color for shapes
noFill() Turn off fill for shapes
stroke(r, g, b) Set the outline color for shapes
strokeWeight(thickness) Change the thickness of lines and outlines
noStroke()Turn off outlines for shapes