Use microtasks.

Author: RubenVerborgh

README.md

@@ -46,8 +46,6 @@ or
 [_Introduction to browserify_](https://writingjavascript.org/posts/introduction-to-browserify).
 You will need to create a "UMD bundle" and supply a name (e.g. with the `-s N3` option in browserify).
 
-> **Note:** In some browser environments you may need to include a shim for the [setImmediate](https://developer.mozilla.org/en-US/docs/Web/API/Window/setImmediate) method.
-
 ## Creating triples/quads
 N3.js follows the [RDF.js low-level specification](http://rdf.js.org/).
 

package-lock.json

@@ -68,5 +68,8 @@
   "pre-commit": [
     "lint",
     "test"
-  ]
+  ],
+  "dependencies": {
+    "queue-microtask": "^1.1.2"
+  }
 }

package.json

@@ -1,7 +1,8 @@
 // **N3Lexer** tokenizes N3 documents.
 import namespaces from './IRIs';
-const { xsd } = namespaces;
+import queueMicrotask from 'queue-microtask';
 
+const { xsd } = namespaces;
 const { fromCharCode } = String;
 
 // Regular expression and replacement string to escape N3 strings.
@@ -437,7 +438,7 @@ export default class N3Lexer {
       this._input = input;
       // If a callback was passed, asynchronously call it
       if (typeof callback === 'function')
-        setImmediate(function () { self._tokenizeToEnd(callback, true); });
+        queueMicrotask(() => self._tokenizeToEnd(callback, true));
       // If no callback was passed, tokenize synchronously and return
       else {
         var tokens = [], error;

src/N3Lexer.js

@@ -1,4 +1,5 @@
 import { Lexer } from '../src/';
+import queueMicrotask from 'queue-microtask';
 
 import { EventEmitter } from 'events';
 
@@ -1016,16 +1017,13 @@ function shouldNotTokenize(lexer, input, expectedError) {
   };
 }
 
-var immediately = typeof setImmediate === 'function' ? setImmediate :
-                  function setImmediate(func) { setTimeout(func, 0); };
-
 function streamOf() {
   var elements = Array.prototype.slice.call(arguments),
       stream = new EventEmitter();
 
   stream.setEncoding = function (encoding) {
     if (encoding === 'utf8')
-      immediately(next, 0);
+      queueMicrotask(next);
   };
 
   function next() {
@@ -1034,7 +1032,7 @@ function streamOf() {
       // use "null" to stall the stream
       if (element !== null) {
         stream.emit('data', element);
-        immediately(next, 0);
+        queueMicrotask(next);
       }
     }
     else {