create-react-app doesn't support `yield`?

Question

I created a project using create-react-app but when I write some code with the keyword yield, the page shows building error claiming 'Unexpected token' at yield.

Is there a way to enable yield in create-react-app projects?

Answer 1

Did you forget to mark the function as a Generator by using the * symbol?

function fn() {
    yield "some value";
}

This code results in a syntax error, since the yield keyword is not allowed in normal functions.

function *generatorFn() {
    yield "some value";
}

This code does not result in a syntax error, since the function is a generator.

For an example see this snippet