Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "When we instruct jQuery to find all elements with the class collapsible and hide them, there is no need to loop through each returned element."

A block of code is set as follows:

body { 
  background-color: #fff; 
  color: #000; 
  font-family: Helvetica, Arial, sans-serif; 
}
h1, h2, h3 { 
  margin-bottom: .2em; 
}
.poem { 
  margin: 0 2em; 
} 
.highlight { 
  background-color: #ccc; 
  border: 1px solid #888; 
  font-style: italic; 
  margin: 0.5em 0; 
  padding: 0.5em; 
} 

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "The Sources tab allows us to view the contents of all loaded scripts on the page."

Warnings or important notes appear in a box like this.

Tips and tricks appear like this.