Non-standard. The
StopIteration
object was a SpiderMonkey-specific feature and is removed in Firefox 58+. For future-facing usages, consider using for..of loops and the iterator protocol.The StopIteration
object was used to tell the end of the iteration in the legacy iterator protocol. Do not use this ancient feature.
Syntax
StopIteration
Description
StopIteration
is a part of legacy iterator protocol, and it will be removed at the same time as legacy iterator and legacy generator.
Examples
StopIteration
is thrown by Iterator
.
var a = { x: 10, y: 20 }; var iter = Iterator(a); console.log(iter.next()); // ["x", 10] console.log(iter.next()); // ["y", 20] console.log(iter.next()); // throws StopIteration
Throwing StopIteration
.
function f() { yield 1; yield 2; throw StopIteration; yield 3; // this is not executed. } for (var n in f()) { console.log(n); // 1 // 2 }
Specifications
Non-standard. Not part of any current standards document
Browser compatibility
Not supported. Used to be in Firefox in versions prior to Firefox 57.