fix: remove setImmediate support check (#144)

setImmediate is available since Node.js v0.9.1

Co-authored-by: Wes Todd <[email protected]>

Author: Phillip9587

HISTORY.md

@@ -1,6 +1,7 @@
 unreleased
 ==================
 
+* Remove `setImmediate` support check
 * Restore `debug` dependency
 
 2.1.0 / 2025-02-10

lib/route.js

@@ -25,11 +25,6 @@ const slice = Array.prototype.slice
 const flatten = Array.prototype.flat
 const methods = METHODS.map((method) => method.toLowerCase())
 
-/* istanbul ignore next */
-const defer = typeof setImmediate === 'function'
-  ? setImmediate
-  : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
-
 /**
  * Expose `Route`.
  */
@@ -139,7 +134,7 @@ Route.prototype.dispatch = function dispatch (req, res, done) {
 
     // max sync stack
     if (++sync > 100) {
-      return defer(next, err)
+      return setImmediate(next, err)
     }
 
     let layer