SolidJS•15mo ago

Ref either locally or passed via prop

I have a TextField that requires a ref to an input field.

let input: HTMLInputElement | undefined

return <div onClick={() => input?.focus()}><input ref={input} /></div>

let input: HTMLInputElement | undefined

return <div onClick={() => input?.focus()}><input ref={input} /></div>

So far so good. But in case I have a parent component that also wants to ref the input, I am no longer sure how to handle it. I have something like this

let input: HTMLInputElement | undefined

return <div onClick={() => ('ref' in props ? props.ref : input)?.focus()}><input ref={'ref' in props ? props.ref : input}/></div>

let input: HTMLInputElement | undefined

return <div onClick={() => ('ref' in props ? props.ref : input)?.focus()}><input ref={'ref' in props ? props.ref : input}/></div>

This works for outer ref, but breaks fallback inner ref. What is the correct way to handle this case? ❤️

3 Replies

Alex Lohr•15mo ago

There's https://github.com/solidjs-community/solid-primitives/blob/main/packages/refs/README.md

GitHub

solid-primitives/README.md at main · solidjs-community/solid-primit...

A library of high-quality primitives that extend SolidJS reactivity. - solid-primitives/README.md at main · solidjs-community/solid-primitives

Alex Lohr•15mo ago

But if you want to do it manually, use a signal for the ref and wrap the setter so that it will also call props.ref?.(node).

const Component = (props) => {
  const [ref, _setRef] = createSignal<HTMLInputElement>();
  const setRef = (node) => { props.ref?.(node); return _setRef(node); };
  return <div onClick={ref()?.focus()}><input ref={setRef} /></div>;
}

const Component = (props) => {
  const [ref, _setRef] = createSignal<HTMLInputElement>();
  const setRef = (node) => { props.ref?.(node); return _setRef(node); };
  return <div onClick={ref()?.focus()}><input ref={setRef} /></div>;
}

Martnart•15mo ago

Much appreciated. Thank you. I'll have a look at the primitive 🙂

Gaming

Programming

Ref either locally or passed via prop