JavaScript Nullish Defaults Sequence

Inputs: [default value], [input fixtures], [expected preservation rules]. Explain the difference between nullish coalescing and logical OR when zero, false or an empty string are valid values. Include null and undefined fixtures. Show only explicit outputs; avoid claiming all falsy values should be retained without the supplied contract. Produce a 12-second animation passing five labeled value tokens through a nullish-only gate. Include one concrete verification step that checks the defining task detail against the supplied inputs. Use [audience] and [tone] to calibrate presentation.

Confirm required reference images and timing inputs are present before generating. Keep objects, identities, spatial relationships and light direction consistent. Render the clip when video generation is supported; otherwise supply a timed shot list, reference checklist and generation-ready prompt, labeled as a production plan. Do not claim rendered output without an actual file. Check the opening, transition and final frame against the stated counts and geometry.