add svelte wallet example

[xcaptain]

I want to use web3.js v2 in my sveltekit app, but you only provide react example app, could you provide an official svelte wallet example app?

I have originally posted my question at anza-xyz/wallet-adapter#1027 but no one answers. So I followed the react demo app made a simple sveltekit app.

source code: https://github.com/xcaptain/solana-wallet-demo
demo website: https://solana-wallet-demo.pages.dev/

If welcome, I can make a pull request to submit this demo app

[xcaptain]

solana-web3.js/examples/react-app/src/context/SelectedWalletAccountContext.tsx

Lines 40 to 44 in 3ea78d8

	for (const wallet of wallets) {
	if (wallet.name === savedWalletName) {
	for (const account of wallet.accounts) {
	if (account.address === savedAccountAddress) {
	return account;

The localStorage in the react-app is not working, because useWallets() doesn't returns accounts

so everytime refresh browser, I will be recgonized as not connected

@steveluscher can you take a look at this?

Above debug info was found at: https://solana-labs.github.io/solana-web3.js/example/

[xcaptain]

I have a workaround to solve the problem when loading walletAccount from localStorage wallet accounts is empty.

https://github.com/xcaptain/solana-wallet-demo/blob/281a8d421aeeb26307cd225706ce2bc3ab4e7988/src/routes/%2Bpage.svelte#L138-L150

this walletAccount can't be used to sign and send transaction, so to send transaction, must connect again

https://github.com/xcaptain/solana-wallet-demo/blob/281a8d421aeeb26307cd225706ce2bc3ab4e7988/src/routes/%2Bpage.svelte#L247-L251

[steveluscher]

1. This GitHub is not suitable for technical support. I will paste in the link for that at the bottom – please re-ask your question about wallet autoconnecting there, paste the link here, and I will answer it.
2. The @solana/web3.js repository is not meant to warehouse a compendium of framework examples, but you should feel free to make one, and to find the most authoritative awesome- list that you can, to have it added there! If you find a particularly good list of example apps, consider sending us a pull request to have it linked to from our examples/README.md.

[github-actions]

Hi @xcaptain,

Thanks for your question!

We want to make sure to keep signal strong in the GitHub issue tracker – to make sure that it remains the best place to track issues that affect the development of the Solana JavaScript SDK itself.

Questions like yours deserve a purpose-built Q&A forum. Unless there exists evidence that this is a bug with the Solana JavaScript SDK itself, please post your question to the Solana Stack Exchange using this link: https://solana.stackexchange.com/questions/ask

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This automated message is a result of having added the ‘question’ tag.

[xcaptain]

Well, 3 days ago it's a question because I don't know how to implement a wallet button in svelte, but now I know it and made a workable demo app and I think there is a bug in the react-app because localStorage is not working, after refresh browser my last used wallet account doesn't show up.

[steveluscher]

…I think there is a bug in the react-app because localStorage is not working, after refresh browser my last used wallet account doesn't show up.

It is a bug, but not in the way you might think. Throw up a question on Stack Exchange, and I'll answer it there so that the entire community of Solana developers can benefit from the answer going in to the future.

[xcaptain]

I posted my question at: https://solana.stackexchange.com/questions/17070/how-to-implement-a-wallet-button-using-web3-js-v2

I have some basic understandings to web3.js, but need someone to help me sort out my thoughts

[steveluscher]

That post asks too many questions at once. If you ask one question at a time, it's more likely to get answered. If you want to post one just asking why accounts is empty for a previously connected wallet upon refresh, I'll be happy to lay out the answer there.

Sorry to be pedantic, and not just answer it here. It's important.

[github-actions]

Because there has been no activity on this issue for 7 days since it was closed, it has been automatically locked. Please open a new issue if it requires a follow up.