vanilla-lazyload

LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve

v19.1.3 URL: https://unpkg.com/vanilla-lazyload@19.1.3/dist/lazyload.min.js

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lazyload vanilla responsive images picture srcset sizes native SEO intersectionObserver progressive performance perfmatters async no-jquery

next-sitemap

Sitemap generator for next.js

v4.2.3 URL: https://unpkg.com/next-sitemap@4.2.3/dist/cjs/index.js

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nextjs next sitemap seo react

linkinator

Find broken links, missing images, etc in your HTML. Scurry around your site and find all those broken links.

v6.1.2 URL: https://unpkg.com/linkinator@6.1.2/index.js

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404 html hyperlink links seo url broken link checker broken link checker

is-language-code

Is given string a language code (as per IANA)

v5.0.12 URL: https://unpkg.com/is-language-code@5.0.12/index.js

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check code codes iana ietf is langref language lookup registry rfc rfc 5646 seo standards valid validate

next-seo

SEO plugin for Next.js projects

v6.6.0 URL: https://unpkg.com/next-seo@6.6.0/lib/next-seo.umd.js

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next.js seo react node ssr