feat(vanilla): prefer using this for atom config

[dai-shi]

It was intentional to avoid this so that it's never confusing when copying atom config objects.
(btw, this was the reason we avoided using class syntax suggested by @Thisen. so, it might be reconsiderable. Though, I'm not sure the final decision because of bundle size / little performance trade-off.)

As it turns out, not using this blocks some extended patterns. jotaijs/jotai-scope#4
(And, I ended up with a suboptimal solution jotaijs/jotai-scope#2.)

Let's see how it can change the situation.

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Name	Status	Preview	Updated (UTC)
jotai	✅ Ready (Inspect)	Visit Preview	Oct 16, 2023 2:16am

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[github-actions]

Size Change: +284 B (0%)

Total Size: 68.6 kB

Filename	Size	Change
dist/system/vanilla.development.js	4.01 kB	+10 B (0%)
dist/system/vanilla.production.js	2 kB	+7 B (0%)
dist/system/vanilla/utils.development.js	4.55 kB	+21 B (0%)
dist/system/vanilla/utils.production.js	2.79 kB	+18 B (+1%)
dist/umd/vanilla.development.js	4.8 kB	-1 B (0%)
dist/umd/vanilla.production.js	2.18 kB	+3 B (0%)
dist/umd/vanilla/utils.development.js	5.33 kB	+82 B (+2%)
dist/umd/vanilla/utils.production.js	3.3 kB	+59 B (+2%)
dist/vanilla/utils.js	5.2 kB	+85 B (+2%)

ℹ️ View Unchanged

Filename	Size
dist/babel/plugin-debug-label.js	907 B
dist/babel/plugin-react-refresh.js	1.14 kB
dist/babel/preset.js	1.38 kB
dist/index.js	242 B
dist/react.js	1.05 kB
dist/react/utils.js	1.26 kB
dist/system/babel/plugin-debug-label.development.js	1.09 kB
dist/system/babel/plugin-debug-label.production.js	757 B
dist/system/babel/plugin-react-refresh.development.js	1.29 kB
dist/system/babel/plugin-react-refresh.production.js	929 B
dist/system/babel/preset.development.js	1.56 kB
dist/system/babel/preset.production.js	1.13 kB
dist/system/index.development.js	236 B
dist/system/index.production.js	167 B
dist/system/react.development.js	1.17 kB
dist/system/react.production.js	701 B
dist/system/react/utils.development.js	713 B
dist/system/react/utils.production.js	451 B
dist/system/utils.development.js	241 B
dist/system/utils.production.js	175 B
dist/umd/babel/plugin-debug-label.development.js	1.06 kB
dist/umd/babel/plugin-debug-label.production.js	845 B
dist/umd/babel/plugin-react-refresh.development.js	1.28 kB
dist/umd/babel/plugin-react-refresh.production.js	1.01 kB
dist/umd/babel/preset.development.js	1.53 kB
dist/umd/babel/preset.production.js	1.24 kB
dist/umd/index.development.js	381 B
dist/umd/index.production.js	329 B
dist/umd/react.development.js	1.18 kB
dist/umd/react.production.js	785 B
dist/umd/react/utils.development.js	1.42 kB
dist/umd/react/utils.production.js	1.03 kB
dist/umd/utils.development.js	398 B
dist/umd/utils.production.js	343 B
dist/utils.js	246 B
dist/vanilla.js	4.72 kB

_{compressed-size-action}

[yf-yang]

Can you please give a short example to explain the difference when patching atom before/after this change?

[dai-shi]

jotaijs/jotai-scope#5 is open.
It simply doesn't work without this change.

[dai-shi]

jotaijs/jotai-scope#5 seems to work well. Let's do this.