SolidJS•2w ago

Function as signal value

Using the accessor of createSignal<null | (x:any)=>...>() doesn't work as expected. I need to wrap the function in an array or object for it to become callable. What's the purpose of that behavior?

5 Replies

bigmistqke•2w ago

i think ur probably getting tripped up by the Setter the setter also accept a function:setSignal(prev => ...) so if you want to set a function you have to do setSignal(() => (x: any) => ...)

bigmistqke•2w ago

https://playground.solidjs.com/anonymous/8a08bc1c-4c1c-4aec-a5fa-de32f9c06c8a

Solid Playground

Quickly discover what the solid compiler will generate from your JSX template

bigmistqke•2w ago

this is handy, for example to prevent infinite loops:

const [count, setCount] = createSignal(0)
createEffect(() => {
  ...
  setCount(count() + 1); // will cause infinite loop, because you describe to a signal you are setting
})

createEffect(() => {
  ...
  setCount(count => count + 1); // will not cause infinite loop
})

const [count, setCount] = createSignal(0)
createEffect(() => {
  ...
  setCount(count() + 1); // will cause infinite loop, because you describe to a signal you are setting
})

createEffect(() => {
  ...
  setCount(count => count + 1); // will not cause infinite loop
})

fewbarOP•2w ago

thanks!

bigmistqke•2w ago

Ur very welcome!

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Function as signal value

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