There are a number of text conventions used throughout this book.
CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "APIService, which displays the @Injectable() annotation that makes it, well, injectable."
A block of code is set as follows:
interface Animal{
eat():void;
sleep():void;
}
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
ReferenceError: window is not defined
Any command-line input or output is written as follows:
$ curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
$ sudo apt-get install -y Node.js
Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "The Model stores the data required by the application according to commands sent by the Controller."
Warnings or important notes appear like this.
Tips and tricks appear like this.