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The thing I've notice that developers struggle with the most when being introduced to Web Components is the concept of the Shadow Dom. Developers are used to tools that fake what a Shadow Down does naturally. You find this in all sorts of technology. Take styling in React for example. React has something called CSS Modules which allows you to scope CSS to a component. It's cool but the issue it solves for is a non-issue in the Web Component world. Constructed style sheets are inherently scoped. Then there is SCSS. SCSS is nice but it assumes the perspective of working in one massive light DOM tree. The "light DOM" is the regular DOM that developers are used to. SCSS is based on this. Think of nesting selectors for example. You create a kind of "scope" by putting once selector as a child of another. This was incredibly popular and useful when BEM emerged.
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Of course this can all be illustrated better by example, so lets dive into it. FYI the following example is going to use Google Lit which I highly recommend if you're writing web components.
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