Can you still? is a JavaScript quiz built around 155 questions that appear simple but are not. Each question asks you to choose an answer and then shows why that answer is right or wrong. It suits developers who want to check and refresh their JavaScript knowledge through short, focused questions rather than long lessons.
A quiz of 155 JavaScript questions that look easy but test your understanding.
What you can do
Work through 155 JavaScript questions.
Choose an answer for each question.
Read an explanation of why the answer is correct.
Publisher / site
Can you still?
Category
Education
Platforms
Web
Languages detected
en
APP PREVIEWS
See Can you still? before you open it.
Browse the available app previews. Select any image to open a larger view.
BEST FOR
Decide whether Can you still? fits your needs.
Useful for
Work through 155 JavaScript questions.
Choose an answer for each question.
Read an explanation of why the answer is correct.
Before you choose
Available on Web
INSTALL GUIDE
Install Can you still? from its official site.
1
Open the official web app
Use the Open site button above in a current version of Chrome, Edge or Safari.
2
Choose the browser install action
Select Install app, or use Add to Home Screen from the browser share or main menu.
3
Confirm and launch
The installed app opens from the device launcher. Browser and platform support can vary.
PWA AUDIT
How well does Can you still? work as an installed app?
The product overview above helps you choose the service. This independent technical section checks its install experience, browser integration and current PWA signals.
CAPABILITY REPORT
Detected web app capabilities.
DeclaredDetectedVerifiedNot found
declared
Standalone app window
Requests the “standalone” display mode when launched.
experience
not found
Advanced window modes
Declares preferred window modes beyond the basic display setting.
experience
not found
Preferred orientation
Requests a preferred device orientation.
experience
not found
Custom launch behavior
Controls how repeated launches reuse or create app windows.
experience
detected
Service worker detected
Registration appears in the page source; offline behavior still needs a runtime test.
experience
not found
App shortcuts
Offers quick actions from the installed app icon.
integration
not found
Share target
Can receive content from the operating system share sheet.
integration
not found
File handlers
Can register supported file types with the operating system.
integration
not found
Protocol handlers
Can open supported custom link protocols.
integration
not found
Related native app
Links the PWA to a related application on another platform.
integration
not found
Install previews
Provides screenshots for richer installation prompts.
presentation
declared
Adaptive Android icon
A maskable icon can fill different launcher icon shapes.
presentation
not found
Monochrome icon
Provides a themed single-color icon for supported surfaces.
