Clientside

A browser-based training platform with JavaScript exercises and React projects sourced from actual frontend interviews, providing prompts, starter code, test suites, and senior-written solutions to practice job-relevant skills and verify edge cases. It sells to individual frontend developers and software engineers preparing for interviews, from early-career to experienced practitioners. It is delivered as a SaaS platform that runs entirely in the browser with an integrated workspace, previews, and immediate test feedback and requires no setup.

Key features

• Browser-based playground with starter code
• Live previews for exercises
• Automated test suites with edge cases
• Senior-written solutions and walkthroughs
• React hooks exercises
• User interface building exercises
• JavaScript fundamentals exercises
• Data structures exercises
• Full interview simulations
• Leveled challenges by difficulty
• Questions from leading companies
• Frontend quizzes