With Hermes engine, certain date formats crash on production but works in debug

[roydipti23]

React Native version: RN60

new Date('Jul 18, 2018') is not supported on RN
new Date('18-07-2018 12:00') is not supported on RN

Steps To Reproduce

1. add date: const reproduce = new Date('Jul 18, 2018');
2. It will crash in production

Describe what you expected to happen:
It should return the expected date.

Snack, code example, screenshot, or link to a repository:

export function getDateFormat(date = 'Jul 18, 2018' ) {
const newDate = new Date(date);
return newDate;
}

export function getDateFormat(date = '18-07-2018 12:00' ) {
const newDate = new Date(date);
return newDate;
}

[radko93]

Are you testing on debug without remote debugging enabled? Because then you are using Chrome to run JS code.

[roydipti23]

@radko93 debug JS remotely is enabled. And this same format was working previously in production before Hermes.

export function getDateFormat(date = 'Jul 18, 2018' ) {
const newDate = new Date(date);
return newDate;
}

[henrymoulton]

I'd recommend looking at using Moment.js. JavaScript engines differ in how they treat Date objects: https://www.freecodecamp.org/news/get-to-know-different-javascript-environments-in-react-native-4951c15d61f5/

[radko93]

@roydipti23 Chrome treats dates differently than Hermes. If you want to test in debug mode turn off remote Chrome debugging.

[HarshitMadhav]

@roydipti23 try using moment js for the same

[jmeistrich]

I'm seeing this also. A date in ISO format like Fri, 06 Sep 2019 18:45:29 +0000 (UTC) parses as an Invalid Date in Hermes. It works on iOS and was working in Android in 0.59. I am now using Moment as a workaround but this should be supported natively.

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as a "Discussion" or add it to the "Backlog" and I will leave it open. Thank you for your contributions.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.