add support for older node versions

.travis.yml

@@ -1,6 +1,9 @@
 language: node_js
 node_js:
+  - '8'
   - '6'
   - '4'
+  - '0.12'
+  - '0.10'
 after_script:
   - npm run coveralls

index.js

@@ -1,7 +1,7 @@
 'use strict';
-const token = '%[a-f0-9]{2}';
-const singleMatcher = new RegExp(token, 'gi');
-const multiMatcher = new RegExp(`(${token})+`, 'gi');
+var token = '%[a-f0-9]{2}';
+var singleMatcher = new RegExp(token, 'gi');
+var multiMatcher = new RegExp('(' + token + ')+', 'gi');
 
 function decodeComponents(components, split) {
 	try {
@@ -18,8 +18,8 @@ function decodeComponents(components, split) {
 	split = split || 1;
 
 	// Split the array in 2 parts
-	const left = components.slice(0, split);
-	const right = components.slice(split);
+	var left = components.slice(0, split);
+	var right = components.slice(split);
 
 	return Array.prototype.concat.call([], decodeComponents(left), decodeComponents(right));
 }
@@ -28,9 +28,9 @@ function decode(input) {
 	try {
 		return decodeURIComponent(input);
 	} catch (err) {
-		let tokens = input.match(singleMatcher);
+		var tokens = input.match(singleMatcher);
 
-		for (let i = 1; i < tokens.length; i++) {
+		for (var i = 1; i < tokens.length; i++) {
 			input = decodeComponents(tokens, i).join('');
 
 			tokens = input.match(singleMatcher);
@@ -42,41 +42,44 @@ function decode(input) {
 
 function customDecodeURIComponent(input) {
 	// Keep track of all the replacements and prefill the map with the `BOM`
-	const replaceMap = new Map([
-		['%FE%FF', '\uFFFD\uFFFD'],
-		['%FF%FE', '\uFFFD\uFFFD']
-	]);
+	var replaceMap = {
+		'%FE%FF': '\uFFFD\uFFFD',
+		'%FF%FE': '\uFFFD\uFFFD'
+	};
 
-	let match = multiMatcher.exec(input);
+	var match = multiMatcher.exec(input);
 	while (match) {
 		try {
 			// Decode as big chunks as possible
-			replaceMap.set(match[0], decodeURIComponent(match[0]));
+			replaceMap[match[0]] = decodeURIComponent(match[0]);
 		} catch (err) {
-			const result = decode(match[0]);
+			var result = decode(match[0]);
 
 			if (result !== match[0]) {
-				replaceMap.set(match[0], result);
+				replaceMap[match[0]] = result;
 			}
 		}
 
 		match = multiMatcher.exec(input);
 	}
 
 	// Add `%C2` at the end of the map to make sure it does not replace the combinator before everything else
-	replaceMap.set('%C2', '\uFFFD');
+	replaceMap['%C2'] = '\uFFFD';
 
-	for (const entry of replaceMap.entries()) {
+	var entries = Object.keys(replaceMap);
+
+	for (var i = 0; i < entries.length; i++) {
 		// Replace all decoded components
-		input = input.replace(new RegExp(entry[0], 'g'), entry[1]);
+		var key = entries[i];
+		input = input.replace(new RegExp(key, 'g'), replaceMap[key]);
 	}
 
 	return input;
 }
 
-module.exports = encodedURI => {
+module.exports = function (encodedURI) {
 	if (typeof encodedURI !== 'string') {
-		throw new TypeError(`Expected \`encodedURI\` to be of type \`string\`, got \`${typeof encodedURI}\``);
+		throw new TypeError('Expected `encodedURI` to be of type `string`, got `' + typeof encodedURI + '`');
 	}
 
 	try {

package.json

@@ -10,7 +10,7 @@
     "url": "github.com/SamVerschueren"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=0.10"
   },
   "scripts": {
     "test": "xo && nyc ava",
@@ -29,9 +29,9 @@
     "url"
   ],
   "devDependencies": {
-    "ava": "*",
+    "ava": "^0.17.0",
     "coveralls": "^2.13.1",
     "nyc": "^10.3.2",
-    "xo": "*"
+    "xo": "^0.16.0"
   }
 }

test.js

@@ -1,8 +1,8 @@
 import test from 'ava';
-import m from '.';
+import m from './';
 
 const tests = {
-	test: 'test',
+	'test': 'test',
 	'a+b': 'a b',
 	'a+b+c+d': 'a b c d',
 	'=a': '=a',