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Method Definitions and Namespace

Functions, including generators and async functions, can be assigned to properties within object initializers.


var o = {
  f1: function() { return 1; },
  f2() { return 2; },
  ['f' + 3]() { return 3; },   // computed method name
  get f4() { return 4; },
  set f5(v) { this.value = v; },
  *f6() {},
  async f7() {}
};
console.log(o.f1(), o.f2(), o.f3(), o.f4);

o.f5 = 5;
console.log(o.value);

1 2 3 4 5

The syntax is sometimes used to declare a 'namespace' to group related functions and variables.


var yourNamespace = {
  m1: function() {},
  m2: function() {},
  p1: 100
};
yourNamespace.m1();