Dot Notation

Use dot notation when accessing properties.

ESLint: dot-notation

Examples

⇣ Incorrect code for this rule:

const snowball = {
  density: 20,
  falling: true
};

const isFalling = snowball["falling"];

⇡ Correct code for this rule:

const snowball = {
  density: 20,
  falling: true
};

const isFalling = snowball.falling;

Bracket Notation

Use bracket notation [] when accessing properties with a variable.

Examples

⇣ Incorrect code for this rule:

const snowball = {
  density: 20,
  falling: true
};

function getProp(prop) {
  return snowball[prop];
}

const isFalling = getProp("falling");

Exponentiation Operator

Use exponentiation operator ** when calculating exponentiations.

ESLint: no-restricted-properties

Examples

⇣ Incorrect code for this rule:

const binary = Math.pow(2, 10);

⇡ Correct code for this rule:

const binary = 2 ** 10;