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A full list of JavaScript operators with examples

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AppScreens turns real app screens into polished, localized, store-ready App Store and Google Play screenshots from one editable project.

Which is more popular?
Based on our record, AppScreens should be more popular than JavaScript Operator Lookup. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | joshwcomeau.com | appscreens.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from Australia · 1 - 9 employees · 2020 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JavaScript Operator Lookup yet.
App Store and Google Play screenshots from one editable project AppScreens is a screenshot production workflow for app teams that need polished, localized, store-ready screenshots without losing hours to manual design, resizing, translation, exports, and uploads. Developers, founders, marketers,...
What each product offers, as listed by its team.


Possible disadvantages
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As answered by people managing JavaScript Operator Lookup and AppScreens.
AppScreens's answer:
AppScreens is built for repeatable screenshot production, not just one-off mockups.
Teams should choose AppScreens when they need to create polished App Store and Google Play screenshots across sizes, languages, variants, releases, and upload workflows from one editable project.
Unlike generic design tools or simple screenshot makers, AppScreens combines:
It is built for developers, founders, marketers, agencies, and product teams that want store-ready screenshots without rebuilding every file by hand.
AppScreens's answer:
The primary audience for AppScreens is app teams that need professional, store-ready screenshots without losing hours or days to manual screenshot production.
AppScreens is especially useful for:
These teams use AppScreens to turn real app screens into polished App Store and Google Play screenshots, localize them across 80+ localizations, create ASO variants, and export or upload store-ready assets from one editable project.
AppScreens's answer:
AppScreens uses a combination of responsive design technology, AI-assisted content workflows, localization tooling, and app store upload integrations to help teams create store-ready screenshot assets.
Key technology areas include:
AppScreens's answer:
AppScreens is unique because it combines screenshot design, localization, ASO variant creation, export, and upload workflows in one repeatable project.
Instead of creating separate screenshot files for every device size, language, store, and experiment, teams can create one editable project and generate store-ready assets for App Store and Google Play.
AppScreens supports responsive resizing, AI captions, AI translation across 80+ localizations, RTL support, automatic text resizing, per-language screenshot changes, professional templates, device frames, high-resolution PNG exports, App Store Connect upload, Google Play workflows, and ASO variants for PPO, Custom Product Pages, and Google Play experiments.
That makes AppScreens stronger than generic design tools or one-off screenshot generators when teams need screenshots that stay reusable across launches, app updates, localization, and testing.
AppScreens's answer:
AppScreens was built by app developers who were tired of losing release time to screenshots.
Every app launch, product update, localization push, device change, ASO test, and store upload created more manual work: new sizes, new captions, new exports, new languages, and new chances to make mistakes.
AppScreens was created to turn that work into one repeatable workflow. Teams can start with real app screens, add templates, AI captions, device frames, brand styling, localization, and ASO variants, then export or upload store-ready assets for App Store Connect and Google Play.
The goal is simple: screenshot production should feel like a build artifact. Update once, generate every size and language, then publish with confidence.
Share your experience with using JavaScript Operator Lookup and AppScreens. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


If you replace your || with ?? You should get the behaviour you are after. This is a good reference for what the operators do in js: https://joshwcomeau.com/operator-lookup. Source: about 5 years ago
Usually, my designer does this for me. But maybe this is close to what you're looking for https://appscreens.com/. Source: about 4 years ago
After the app ideation, the code, and a bit of testing here and there, it was finally time to get it out there, on the Google Play Store to be more specific, though the App Store version will be coming out soon enough. Doing that... - Source: dev.to / almost 5 years ago
Check out appscreens.com for great tools in making clean screenshots. Source: over 5 years ago
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