A single-serving website from Alexander Vishnyakov for testing if it’s valid to put any particular HTML element within another type of HTML element. Kinda neat to have a quick reference for this.
Some combinations feel fairly obvious: can you put a <video> inside an <input>? Uh, no. Some are trickier: can you put a <div> inside an <h1>? Nope — that one bit me this week (derp). Some are a little confusing, like <div> is an invalid child of an <ol> but a valid child of a <dl>.
