Using Handlebars Async Helpers for Non‑Blocking Server‑Side Rendering
Learn how Handlebars async helpers let you fetch data directly in templates without blocking the render loop, and see the trade‑offs you need to consider.
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nodejsHandlebars helper execution remains synchronous, blocking async operations
Handlebars 4.x executes every helper synchronously and does not await promises returned by helper functions. The engine coerces the helper result directly to a string, so an unresolved promise appears as “[object Promise]” or an empty string in the rendered output. The documentation explicitly states that helpers must return a string or a Handlebars.SafeStri