Prework Study Guide

HTML

The head element contains information about the webpage.
The body element represents the visibile content shown to the user.
Elements are the parts of the HTML document which help the web browser understand how to display the contents.
Tags and elements are slightly different, but often used interchangably, even if this is technically incorrect.
Header tags are listed as h1, h2, h3 etc. and h1 is the largest size while h6 is the smallest.
The src attribute is important because it defines the location of the image.

CSS is mostly concerned with the aesthetic and layout of a website.
A margin indicates how much space we want around the outside of an element.
A padding indicates how much space we want around the content inside an element.
There are three main ways to style using CSS, inline CSS, internal CSS style sheet, and external CSS style sheet.
External CSS style sheet is most commonly used as it allows for more flexibility with making changes because it uses an external separate file.
When working with External CSS style sheets you must link it to the HTML file by using the link element.
Do Not Repeat Yourself Code (or DRY) is encouraged as it allows the code to be more easily fixed and read between different developers.
margin relates to the amount of space that goes on the outside of an element.
padding relates to the amount of space that goes around the content that is inside an element.

git status: checks what branch we are currently on
git checkout -b branch-name: creates a new branch and switches to it
Git commands always start with git
Using a git pull is a good way to ensure you have the latest version of your code.
git push origin allows you to create a new branch or add changes to a branch.
It is very important to make sure you are working in the correct branch, which is usually not the main branch.

A variable is a named container that allows us to store data in our code.
Control flow is the order in which a computer executes code in a script.
Order is important in JavaScript because tasks are executed from top to bottom.
A function defines a block of code that performs a certain task.
Functions do not execute on their own, you must call the function in code in order to get it to execute.
JavaScript is an Object Oriented Programming Language.
Items in an array have a unique number assigned to them, which always starts from 0.
An array can store a variety of different types of data, such as strings, numbers and Boolean values.
A function differs from a for loop as it does not execute automatically, while a for loop does.