JavaScript.com might be a bit more popular than Startup First Users. We know about 1 link to it since March 2021 and only 1 link to Startup First Users. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Cool little resource I found https://earlyusergrowth.com/startups/. Source: about 4 years ago
The best resource I know of is Javascript.com for learning Javascript for the first time. It's made by Pluralsight which is a site that contains courses. - Source: dev.to / almost 3 years ago
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Learn JavaScript - Learn JavaScript with guided tests and flashcards