Conventions used

There are a number of text conventions used throughout this book.

Code in text: 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: "In the try block, you place your risky statements, and inside catch, you handle the possible exceptions."

A block of code is set as follows:

behaviourSubject$.subscribe({
  next: (message) => console.log(message),
  error: (error) => console.log(error),
  complete: () => console.log('Stream Completed'),
});

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

behaviourSubject$.subscribe({
  next: (message) => console.log(message),
  error: (error) => console.log(error),
  complete: () => console.log('Stream Completed'),
});

Any command-line input or output is written as follows:

$ mkdir css
$ cd css

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: "Select System info from the Administration panel."

Tips or Important Notes

Appear like this.