Simple Date.now() computed not working properly

[Namidas]

As the title suggests, I'm just trying to do something like this:

computed: {
        dateNow: function () { return Date.now() },
}

But I keep getting a static value (from the first-ever call to that computed).

Any thoughts on this?
Just to do a quick check, I tried adding a rand number, but still no good, something like:

computed: {
dateNow: function () { return Date.now() + Math.random() },
}

[leopiccionia]

That's expected, because computed properties are cached until any reactive dependency (data, props, injected values, other computed properties, etc.) changes.

Because dateNow has no reactive dependency, it'll always return the initial cached value.

Depending of your needs, some fixes include:

• moving dateNow from computed to methods
• adding dateNow to data, and update it inside of a setInterval

See more on the docs: https://vuejs.org/guide/essentials/computed.html#computed-caching-vs-methods

[Namidas]

Yes! Thanks ^_^

[Mister-Hope]

You may have a look at vueuse, it has a lot of useful composables. And you can learn from it's source code.
https://vueuse.org/core/usenow/#usenow

[Namidas]

thanks!
that site is going to be really useful