Base44 mobile

Modals and Popups Cut Off on Small Mobile Screens

Modals, popups, and dialog boxes in your Base44 app are unusable on mobile devices. The modal content extends beyond the screen with no way to scroll, action buttons at the bottom are hidden below the viewport, and users can't complete the action the modal was designed for.

Modals are used for critical interactions in Base44 apps: editing records, confirming deletions, viewing details, and filling out forms. When they're broken on mobile, users are stuck and can't complete core workflows.

The issue is especially bad on smaller phones (iPhone SE, older Android devices) and when the device keyboard opens inside a modal form, shrinking the visible area to almost nothing.

Error Messages You Might See

Submit button not visible on mobile modal Cannot scroll modal content on phone Modal form fields hidden behind keyboard Modal extends beyond screen boundaries
Submit button not visible on mobile modalCannot scroll modal content on phoneModal form fields hidden behind keyboardModal extends beyond screen boundaries

Common Causes

  • Fixed height exceeding viewport — Modals have a fixed height (e.g., 600px) that exceeds small phone screens (667px or less)
  • No internal scrolling — Modal content doesn't scroll, so content below the fold is permanently hidden
  • Centered positioning ignores viewport — CSS centering with transform places the modal partially off-screen on short viewports
  • Keyboard pushes modal up — When the keyboard opens for form inputs, the modal shifts up and the top is cut off
  • Padding consuming too much space — Large padding inside the modal wastes valuable screen real estate on mobile

How to Fix It

  1. Use max-height: 90vh with overflow-y: auto — Limit modal height to 90% of viewport and make the content scrollable
  2. Make modals full-screen on mobile — Below 768px, switch modals to full-screen sheets that cover the entire viewport with proper scrolling
  3. Stick action buttons to the bottom — Use position: sticky; bottom: 0 on the button row so it's always visible regardless of scroll position
  4. Reduce padding on mobile — Use smaller internal padding (12px instead of 24px) on screens below 640px
  5. Handle keyboard appearance — Use the Visual Viewport API to adjust modal position when the keyboard opens

Real developers can help you.

Krishna Sai Kuncha Krishna Sai Kuncha Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : ) Prakash Prajapati Prakash Prajapati I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale. Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology. Pratik Pratik SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well. Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Franck Plazanet Franck Plazanet I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth. Core Expertise: 🚀 Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement. 🏗️ Architecture: Enterprise Core Systems, Multi-system Integration (ERP/API/ETL), and Core Database Structure. ☁️ Cloud & Scale: AWS Expert; architected systems handling 10B+ monthly requests and managing 100k+ SKUs. 📈 Business Impact: Aligning tech strategy with P&L goals to drive $70k+ in monthly recurring revenue. I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity. Jacek Rozanski Jacek Rozanski Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004). Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month. What I bring to AI-built apps: - I audit and fix security issues (OWASP methodology), performance bottlenecks, and architectural problems in codebases generated by Cursor, Claude Code, Lovable, Bolt, and v0 - I refactor AI-generated prototypes into production-grade applications with proper error handling, testing, and clean architecture (SOLID, DDD, hexagonal architecture) - I set up the infrastructure AI tools don't touch: AWS hosting, CI/CD pipelines, automated deployments, database optimization, monitoring, and alerting - I integrate external services: payment providers, email systems, partner APIs, SSO/auth Tech stack: PHP 8.x, Symfony, React, Next.js, PostgreSQL, MySQL, Docker, AWS (ECS, RDS, S3, SQS/SNS, CloudFront), Terraform, Supabase. I also use AI tools daily (Claude Code, Cursor) in my own workflow, so I understand both the strengths and the gaps in AI-generated code. Based in Poland (CET timezone). Available for async work and calls during EU/US business hours. Daniel Vázquez Daniel Vázquez Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting. Alvin Voo Alvin Voo I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing. My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream. What I bring to your project: Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins. Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams. Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.

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Frequently Asked Questions

Why can't I see the buttons at the bottom of my Base44 modal on mobile?

The modal height exceeds the phone's screen height and the content isn't scrollable. Add max-height: 90vh and overflow-y: auto to the modal, or make buttons sticky at the bottom of the modal.

Should I use modals at all on mobile?

For simple confirmations, modals are fine. For forms with multiple fields, consider navigating to a full-page form on mobile instead of using a modal. This gives users more space and avoids keyboard issues.

Related Base44 Issues

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