How Can Modernizr Help You Create Flexbox Fallbacks for IE9?

IE9 Flexbox Alternative: Modernizr to the Rescue

As you've discovered, IE9 does not support Flexbox, posing a challenge for maintaining cross-browser consistency. However, by leveraging Modernizr, you can detect Flexbox capabilities and provide fallback styles as needed.

Modernizr Fallback Implementation

Modernizr adds specific classes to the html element to indicate Flexbox support. This allows you to apply appropriate styles based on the detected capabilities:

<code class="css">.container {
  display: flex; /* For browsers with Flexbox */
}

.no-flexbox .container {
  display: table-cell; /* Fallback for IE9 and older */
}</code>

Zoe Gillenwater's Fallback Recommendations

Zoe Gillenwater (@zomigi) provides valuable insights in her presentations on Flexbox fallbacks. Some key takeaways include:

• Horizontal Navigation Spacing: Use inline-block for spacing elements in horizontal navigation.
• Pinning Elements: If flexbox isn't available, table-cell display can be used to pin elements.
• Form Alignment Fallbacks: Consider using inline-flex for forms to achieve layout stability.
• Flex Order Fallbacks: Modernizr adds a no-flexbox-order class to indicate missing flex order support.

Additional Resources

For further guidance on cross-browser Flexbox compatibility, refer to the following resources:

• [caniuse Flexbox Support Data](https://caniuse.com/flexbox)
• [Zoe Gillenwater's "Leveling Up with Flexbox" Presentation](https://slides.com/zomigi/level-up-your-flexbox-skills-latest-techniques-css-tuts#/1/0)
• [Zoe Gillenwater's "CSS3 Layout" Presentation](https://slides.com/zomigi/css3-layout-new-old-and-sexy#/1/0)

Conclusion

By combining Modernizr's detection capabilities with fallback styles informed by Zoe Gillenwater's recommendations, you can effectively provide a consistent user experience across browsers that both support and lack Flexbox.

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