while
loop, that will yield
a value every time Generator.prototype.next()
is called.yield
statement to update the returned value if the passed value is not undefined
.const repeatGenerator = function* (val) {
let v = val;
while (true) {
let newV = yield v;
if (newV !== undefined) v = newV;
}
};
const repeater = repeatGenerator(5); repeater.next(); // { value: 5, done: false } repeater.next(); // { value: 5, done: false } repeater.next(4); // { value: 4, done: false } repeater.next(); // { value: 4, done: false }
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