JavaScript Nullish Defaults Narration

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 45-second coding explanation with pauses between each input and its resulting value. Include one concrete verification step that checks the defining task detail against the supplied inputs. Use [audience] and [tone] to calibrate presentation.

Use only the supplied facts and approved wording. If a necessary script or timing reference is missing, ask for it first. Produce the audio when supported; otherwise return the complete spoken script with pauses and a short production cue sheet, clearly labeled as a script. Use original voices and keep speech intelligible without music. Never claim an audio file exists unless it was generated.