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: “So { lastname: "Clinton" } can also be written { "lastname": "Clinton" } by surrounding the lastname property with single or double quotes.”

A block of code is set as follows:

var p = { lastname : "Clinton", firstname : "Bill" };
console.log("The person is", p);

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

class Person {
  firstname;
  lastname;
  age;
}
var p = new Person;
console.log(p);

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: “This writing format is also called JavaScript Object Notation (JSON) format.”

Tips or Important Notes

Appear like this.