StopIteration
object was a SpiderMonkey-specific feature and is removed in Firefox 58+. For future-facing usages, consider using
for..of
loops and the
迭代器协议
.
StopIteration
object was used to tell the end of the iteration in the legacy iterator protocol. Do not use this ancient feature.
StopIteration
StopIteration
is a part of legacy iterator protocol, and it will be removed at the same time as legacy iterator and legacy generator.
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
}
Non-standard. Not part of any current standards document
Not supported. Used to be in Firefox in versions prior to Firefox 57.