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JavaScript Transpiling with Standalone Babel CLI

Brendan Whiting
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Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points
Posted by Brendan Whiting
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Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points

What does the transpiler do with the Map or Promise objects?

I'm running some bits of ES2015 code through the babeljs.io playground, and it just seems to leave Map and Promise objects as is in the "old" javascript. How does that work with the old browsers?

1 Answer

akak
akak
29,445 Points
akak
akak
29,445 Points

Babel adds polyfills for those. Read more here: https://babeljs.io/docs/usage/polyfill/