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@financial-times/o-viewport 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("@financial-times/o-utils/package.json"); // @financial-times/o-utils is a peer dependency.
// require("@financial-times/o-viewport/[??]")
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