>
> Here is code that breaks with that solution: ``` function
> createParser(code) { return {then: chainedTransformation => { ...; return
> this; } } } waitForFormSubmit() .then(e => $.get(getUrlFromUrlField()))
> .then(code => createParser(code, options)) ```Not necessarily - if you're using new DOM APIs which return promises, then you need to upgrade your libraries. Libraries are easy to upgrade. A crummy legacy is not.
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