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respimage lists no main file and has no index.js, so it can't be directly required. If this is a mistake, please let us know. It may however contain internal files that you can require manually:

// require("respimage/[??]")

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respimage v1.4.2

The fast, lightweight and reliable polyfill for responsive images (i.e. picture element and the srcset, sizes and media attributes). With a smart resource selection algorithm, that saves bandwidth.

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