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Allow reactivity inside functions

See original GitHub issue

When I use a function inside my template, eg <p>{getUserName()}</p>, and getUserName() is using a reactive variable, the template is not updated when the reactive variable changes. I guess this is due to the compiler not analyzing the function and looking which variables it depends on. But, if I use an inline function inside the template (as demonstrated in the below), it updates just fine.

https://svelte.dev/repl/df444c2dfa5240ae9c8c203aaabdcd61?version=3.9.1

How hard would it be to add this feature?

Issue Analytics

State:
Created 4 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

5reactions

buhrmicommented, Aug 27, 2019

@PaulMaly wow, thanks for that. I guess that solves this issue in a “sufficiently elegant” way 😃

3reactions

PaulMalycommented, Aug 27, 2019

@buhrmi Please check workaround for this feature: https://svelte.dev/repl/39fcb67d8041423e84d7c08da75b05de?version=3.9.1

Basically, you can think about regular function call inside of your template as about pull reactivity and reactive declarations as push reactivity. Both methods we need in some cases.

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