Syntax - Backend services

Overview

Syntax for services and code used in backend services deployed to AWS

Node code formatting

Indentation

• 2 spaces
• no tabs

New lines

• \n (unix style)

White space

• none at end of line
• do not indent empty lines

Semi-colons

• always add at end of statements

Quoting strings

• single quotes
• except in JSON or if string has single quote, can use double quotes then

Opening braces

• place on same line as statement
• correct:

if (true) {

• wrong:

if(true)
{

Closing braces

• else on same line as closing brace
• correct:

} else {

Declaring var

• one var declaration per line
• wrong:

var keys = [‘foo’, ‘bar’],
values = [23, 42],

Line length

• less than 80 characters

Declaring variables

• always declare constants using “const”, so cannot accidentally change
• variables usually declare using “let” which scopes to block where possible, “var” is function scoped

Functions

• In most cases use named functions