What steps do you take to optimize layouts for fast loading times on web pages?
- garrone
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Sample interview questions: What steps do you take to optimize layouts for fast loading times on web pages?
Sample answer:
- Optimizing Images:
- Compress images before uploading them to the web. Tools like Photoshop or online image compressors can help reduce file sizes while maintaining quality.
- Use appropriate image formats. For photos, JPEG is generally preferred for its smaller file size, while PNG is better for graphics with sharp edges and transparent backgrounds.
- Consider using SVG (Scalable Vector Graphics) for icons, logos, and other simple graphics. SVGs are resolution-independent, meaning they can scale without losing quality.
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Utilize CSS sprites. This technique combines multiple images into a single file, reducing the number of HTTP requests needed to load the page.
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Minifying CSS and JavaScript:
- Minify CSS and JavaScript files to remove unnecessary characters like whitespace, comments, and newlines. Minification reduces file size without affecting functionality.
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Combine multiple CSS and JavaScript files into a single file. This reduces the number of HTTP requests and improves loading time.
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Lazy Loading:
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Implement lazy loading for images and videos. This technique delays the loading of non-critical content until it appears on the user’s screen, prioritizing the loading of visible content first.
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Using a Content Delivery Network (CDN): Read full answer