function*

Baseline

20169

function*

function*

const foo = function* () {
  yield "a";
  yield "b";
  yield "c";
};

let str = "";
for (const val of foo()) {
  str += val;
}

console.log(str);
// : "abc"

function* (param0) {
  statements
}
function* (param0, param1) {
  statements
}
function* (param0, param1, /* , */ paramN) {
  statements
}

function* name(param0) {
  statements
}
function* name(param0, param1) {
  statements
}
function* name(param0, param1, /* , */ paramN) {
  statements
}

: function* function function

name
paramN
statements

function* function* function* function* function* function* IIFE

function*

x

const x = function* (y) {
  yield y * y;
};


ECMAScript 2027 LanguageSpecification # sec-generator-function-definitions

function*
GeneratorFunction
yield
yield*

MDN

MDN 202591

GitHub

JavaScript
JavaScript
1. (+)
2. (+=)
3. (=)
4. async function
5. async function*
6. await
7. (&)
8. (&=)
9. (~)
10. (|)
11. (|=)
12. (^)
13. (^=)
14. class
15. (,)
17. (--)
18. delete
20. (/)
21. (/=)
22. (==)
23. (**)
24. (**=)
25. function
26. function*
27. (>)
28. (>=)
29. ( )
30. import.meta
  1. import.meta.resolve()
31. import()
  1. import.defer()
  2. import.source()
32. in
33. (++)
34. (!=)
35. instanceof
36. (<<)
37. (<<=)
38. (<)
39. (<=)
40. (&&)
41. (&&=)
42. (!)
43. (||)
44. (||=)
45. (*)
46. (*=)
47. new
48. new.target
49. null
50. (??=)
51. (??)
54. (?.)
56. (%)
57. (%=)
58. (>>)
59. (>>=)
60. (...)
61. (===)
62. (!==)
63. (-)
64. (-=)
65. super
66. this
67. typeof
68. (-)
69. (+)
70. (>>>)
71. (>>>=)
72. void
73. yield
74. yield*