var-statement.md

Var Statement

Declare one variable per var statement, it makes it easier to re-order the lines. Use your best judgement to place the variables where they make sense.

JavaScript

Right:

var keys   = ['foo', 'bar'];
var values = [23, 42];

var object = {};
while (keys.length) {
  var key = keys.pop();
  object[key] = values.pop();
}

Wrong:

var keys = ['foo', 'bar'],
  values = [23, 42],
  object = {},
  key;

while (keys.length) {
  key = keys.pop();
  object[key] = values.pop();
}