Move to ESM

.c8rc.json

@@ -1,9 +1,7 @@
 {
 	"all": true,
 	"exclude": [
-		"{coverage,test}/**",
-		".eslintrc.js",
-		"index.d.ts"
+		"{coverage,test}/**"
 	],
 	"reporter": [
 		"html",

.editorconfig

@@ -0,0 +1,12 @@
+root = false
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.yml]
+indent_style = space
+indent_size = 2

.gitattributes

@@ -0,0 +1,2 @@
+* text=auto eol=lf
+*.snap binary

.github/workflows/ci.yml

@@ -13,12 +13,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [^10.18.0, ^12.14.0, ^14]
+        node-version: [18, 20, 21]
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install --no-audit

index.js

@@ -1,21 +1,23 @@
-'use strict'
+import {compare, compareDescriptors} from './lib/compare.js';
+import describe from './lib/describe.js';
+import {diff, diffDescriptors} from './lib/diff.js';
+import {format, formatDescriptor} from './lib/format.js';
+import {serialize, deserialize} from './lib/serialize.js';
 
-const compare = require('./lib/compare')
-const describe = require('./lib/describe')
-const diff = require('./lib/diff')
-const format = require('./lib/format')
-const serialize = require('./lib/serialize')
+export {compare, compareDescriptors} from './lib/compare.js';
+export {default as describe} from './lib/describe.js';
+export {diff, diffDescriptors} from './lib/diff.js';
+export {format, formatDescriptor} from './lib/format.js';
+export {serialize, deserialize} from './lib/serialize.js';
 
-exports.compare = compare.compare
-exports.compareDescriptors = compare.compareDescriptors
-
-exports.describe = describe
-
-exports.diff = diff.diff
-exports.diffDescriptors = diff.diffDescriptors
-
-exports.format = format.format
-exports.formatDescriptor = format.formatDescriptor
-
-exports.serialize = serialize.serialize
-exports.deserialize = serialize.deserialize
+export default {
+	compare,
+	compareDescriptors,
+	describe,
+	diff,
+	diffDescriptors,
+	format,
+	formatDescriptor,
+	serialize,
+	deserialize,
+};

lib/Circular.js

@@ -1,35 +1,39 @@
-'use strict'
-
-class Circular {
-  constructor () {
-    this.stack = new Map()
-  }
-
-  add (descriptor) {
-    if (this.stack.has(descriptor)) throw new Error('Already in stack')
-
-    if (descriptor.isItem !== true && descriptor.isMapEntry !== true && descriptor.isProperty !== true) {
-      this.stack.set(descriptor, this.stack.size + 1)
-    }
-    return this
-  }
-
-  delete (descriptor) {
-    if (this.stack.has(descriptor)) {
-      if (this.stack.get(descriptor) !== this.stack.size) throw new Error('Not on top of stack')
-      this.stack.delete(descriptor)
-    }
-    return this
-  }
-
-  has (descriptor) {
-    return this.stack.has(descriptor)
-  }
-
-  get (descriptor) {
-    return this.stack.has(descriptor)
-      ? this.stack.get(descriptor)
-      : 0
-  }
+export default class Circular {
+	constructor() {
+		this.stack = new Map();
+	}
+
+	add(descriptor) {
+		if (this.stack.has(descriptor)) {
+			throw new Error('Already in stack');
+		}
+
+		if (descriptor.isItem !== true && descriptor.isMapEntry !== true && descriptor.isProperty !== true) {
+			this.stack.set(descriptor, this.stack.size + 1);
+		}
+
+		return this;
+	}
+
+	delete(descriptor) {
+		if (this.stack.has(descriptor)) {
+			if (this.stack.get(descriptor) !== this.stack.size) {
+				throw new Error('Not on top of stack');
+			}
+
+			this.stack.delete(descriptor);
+		}
+
+		return this;
+	}
+
+	has(descriptor) {
+		return this.stack.has(descriptor);
+	}
+
+	get(descriptor) {
+		return this.stack.has(descriptor)
+			? this.stack.get(descriptor)
+			: 0;
+	}
 }
-module.exports = Circular

lib/Indenter.js

@@ -1,22 +1,19 @@
-'use strict'
+export default class Indenter {
+	constructor(level, step) {
+		this.level = level;
+		this.step = step;
+		this.value = step.repeat(level);
+	}
 
-class Indenter {
-  constructor (level, step) {
-    this.level = level
-    this.step = step
-    this.value = step.repeat(level)
-  }
+	increase() {
+		return new Indenter(this.level + 1, this.step);
+	}
 
-  increase () {
-    return new Indenter(this.level + 1, this.step)
-  }
+	decrease() {
+		return new Indenter(this.level - 1, this.step);
+	}
 
-  decrease () {
-    return new Indenter(this.level - 1, this.step)
-  }
-
-  toString () {
-    return this.value
-  }
+	toString() {
+		return this.value;
+	}
 }
-module.exports = Indenter

lib/Registry.js

@@ -1,24 +1,21 @@
-'use strict'
+export default class Registry {
+	constructor() {
+		this.counter = 0;
+		this.map = new WeakMap();
+	}
 
-class Registry {
-  constructor () {
-    this.counter = 0
-    this.map = new WeakMap()
-  }
+	has(value) {
+		return this.map.has(value);
+	}
 
-  has (value) {
-    return this.map.has(value)
-  }
+	get(value) {
+		return this.map.get(value).descriptor;
+	}
 
-  get (value) {
-    return this.map.get(value).descriptor
-  }
-
-  alloc (value) {
-    const index = ++this.counter
-    const pointer = { descriptor: null, index }
-    this.map.set(value, pointer)
-    return pointer
-  }
+	alloc(value) {
+		const index = ++this.counter;
+		const pointer = {descriptor: null, index};
+		this.map.set(value, pointer);
+		return pointer;
+	}
 }
-module.exports = Registry