The answer
Control flow libraries like async.js (async.waterfall, async.series). These managed the flow of callbacks without deep nesting. They are rarely needed now that promises and async/await are native.
How to Avoid Callback Hell in JavaScript
What was the pre-promise solution for callback hell in JavaScript?
More FAQs in How to Avoid Callback Hell in JavaScript
Use async/await (cleanest, looks synchronous with try/catch), promises (.then chains with .catch), or named functions (flat but verbose). Never write deeply nested anonymous callbacks.
async/await. It makes async code look synchronous, eliminates nesting, and uses try/catch for errors. It is the cleanest and most readable solution for modern code.
They keep the code flat instead of nested. Each callback is a named function defined at the top level, not an anonymous inline function. The code reads top-to-bottom instead of drifting right (pyramid).
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