Warning about using refs in event binding

[antony]

It is useful to call methods on nested components by making use of refs in event bindings. Whilst this is possible, and works well, Svelte issues a warning when compiling. I would expect Svelte to either not issue a warning, or to not work - right now it does both.

The error is:

'refs.nested.toggleEggs' is an invalid callee (should be one of this.*, event.*, set, fire or destroy)

The ideal resolution for me is to add 'refs.*' as an allowed callee.

Svelte REPL example - open the console to see the warning:

https://svelte.technology/repl?version=1.23.4&gist=b8cd68ce59240062798c647474e1782a

[Rich-Harris]

The ideal resolution for me is to add 'refs.*' as an allowed callee

Me too. Didn't actually realise that this already works! We'll have to add some tests to guard against it no longer working.

[Rich-Harris]

This is added in 1.27 (i.e. no more warning. It will throw an error if you use a ref that doesn't exist)