What are polyfills and why are they used?
Polyfills are scripts that enable web applications to use features that are not natively supported in certain browsers. They help ensure compatibility.
Are there alternatives to using polyfills?
Yes, alternatives include using feature detection libraries like Modernizr, transpiling code with Babel, or adopting progressive enhancement.
What is progressive enhancement?
Progressive enhancement is a web development strategy that focuses on building a basic level of user experience for all users, then enhancing it for those with better browsers or devices.
Can you give an example of a feature detection library?
Sure! Modernizr is a popular feature detection library that allows you to check for support of HTML5 and CSS3 features in the user's browser.
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