feat: add internal-slot

DOWNLOAD_STATS.md

@@ -32,6 +32,7 @@
 | `@nolyfill/has-proto` | [![npm](https://img.shields.io/npm/dm/@nolyfill/has-proto.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/has-proto) |
 | `@nolyfill/has-symbols` | [![npm](https://img.shields.io/npm/dm/@nolyfill/has-symbols.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/has-symbols) |
 | `@nolyfill/has-tostringtag` | [![npm](https://img.shields.io/npm/dm/@nolyfill/has-tostringtag.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/has-tostringtag) |
+| `@nolyfill/internal-slot` | [![npm](https://img.shields.io/npm/dm/@nolyfill/internal-slot.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/internal-slot) |
 | `@nolyfill/is-arguments` | [![npm](https://img.shields.io/npm/dm/@nolyfill/is-arguments.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/is-arguments) |
 | `@nolyfill/is-array-buffer` | [![npm](https://img.shields.io/npm/dm/@nolyfill/is-array-buffer.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/is-array-buffer) |
 | `@nolyfill/is-date-object` | [![npm](https://img.shields.io/npm/dm/@nolyfill/is-date-object.svg?style=flat-square&logo=npm&logoColor=white&label=download&color=333)](https://www.npmjs.com/package/@nolyfill/is-date-object) |

create.cjs

@@ -428,7 +428,7 @@ module.exports = function isGeneratorFunction(fn) {
   if (typeof fn !== 'function') return false;
   if (isFnRegex.test(Function.prototype.toString.call(fn))) return true;
   return Object.getPrototypeOf(fn) === GeneratorFunction;
-}`],
+};`],
   ['side-channel', `module.exports = () => {
   let $wm, $m;
 
@@ -465,7 +465,43 @@ module.exports = function isGeneratorFunction(fn) {
     }
   };
   return { get, set, has, assert };
-}`]
+};`],
+  ['internal-slot', `const channel = new WeakMap();
+const check = (O, slot) => {
+  if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
+    throw new TypeError('\`O\` is not an object');
+  }
+  if (typeof slot !== 'string') {
+    throw new TypeError('\`slot\` must be a string');
+  }
+};
+const has = (O, slot) => {
+  check(O, slot);
+  const slots = channel.get(O);
+  return !!slots && Object.prototype.hasOwnProperty.call(slots, \`$\${slot}\`);
+};
+const get = (O, slot) => {
+  check(O, slot);
+  const slots = channel.get(O);
+  return slots && slots[\`$\${slot}\`];
+};
+const set = (O, slot, V) => {
+  check(O, slot);
+  let slots = channel.get(O);
+  if (!slots) {
+    slots = {};
+    channel.set(O, slots);
+  }
+  slots[\`$\${slot}\`] = V;
+};
+const assert = (O, slot) => {
+  check(O, slot);
+  channel.assert(O);
+  if (!has(O, slot)) {
+    throw new TypeError(\`\\\`\${slot}\\\` is not present on \\\`O\\\`\`);
+  }
+};
+module.exports = Object.freeze({ has, get, set, assert });`]
 ]);
 
 const manualPackagesList = /** @type {const} */ ([

package.json

@@ -63,6 +63,7 @@
       "has-proto": "workspace:@nolyfill/has-proto@*",
       "has-symbols": "workspace:@nolyfill/has-symbols@*",
       "has-tostringtag": "workspace:@nolyfill/has-tostringtag@*",
+      "internal-slot": "workspace:@nolyfill/internal-slot@*",
       "is-arguments": "workspace:@nolyfill/is-arguments@*",
       "is-array-buffer": "workspace:@nolyfill/is-array-buffer@*",
       "is-date-object": "workspace:@nolyfill/is-date-object@*",
@@ -146,6 +147,7 @@
     "has-proto": "npm:@nolyfill/has-proto@latest",
     "has-symbols": "npm:@nolyfill/has-symbols@latest",
     "has-tostringtag": "npm:@nolyfill/has-tostringtag@latest",
+    "internal-slot": "npm:@nolyfill/internal-slot@latest",
     "is-arguments": "npm:@nolyfill/is-arguments@latest",
     "is-array-buffer": "npm:@nolyfill/is-array-buffer@latest",
     "is-date-object": "npm:@nolyfill/is-date-object@latest",

packages/cli/src/all-packages.ts

@@ -31,6 +31,7 @@ export const allPackages = [
   "has-proto",
   "has-symbols",
   "has-tostringtag",
+  "internal-slot",
   "is-arguments",
   "is-array-buffer",
   "is-date-object",

packages/internal-slot/index.js

@@ -0,0 +1,37 @@
+'use strict';
+const channel = new WeakMap();
+const check = (O, slot) => {
+  if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
+    throw new TypeError('`O` is not an object');
+  }
+  if (typeof slot !== 'string') {
+    throw new TypeError('`slot` must be a string');
+  }
+};
+const has = (O, slot) => {
+  check(O, slot);
+  const slots = channel.get(O);
+  return !!slots && Object.prototype.hasOwnProperty.call(slots, `$${slot}`);
+};
+const get = (O, slot) => {
+  check(O, slot);
+  const slots = channel.get(O);
+  return slots && slots[`$${slot}`];
+};
+const set = (O, slot, V) => {
+  check(O, slot);
+  let slots = channel.get(O);
+  if (!slots) {
+    slots = {};
+    channel.set(O, slots);
+  }
+  slots[`$${slot}`] = V;
+};
+const assert = (O, slot) => {
+  check(O, slot);
+  channel.assert(O);
+  if (!has(O, slot)) {
+    throw new TypeError(`\`${slot}\` is not present on \`O\``);
+  }
+};
+module.exports = Object.freeze({ has, get, set, assert });

packages/internal-slot/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@nolyfill/internal-slot",
+  "version": "1.0.19",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/SukkaW/nolyfill",
+    "directory": "packages/internal-slot"
+  },
+  "main": "./index.js",
+  "license": "MIT",
+  "files": [
+    "*.js"
+  ],
+  "scripts": {},
+  "dependencies": {},
+  "engines": {
+    "node": ">=12.4.0"
+  }
+}

packages/is-generator-function/index.js

@@ -6,4 +6,4 @@ module.exports = function isGeneratorFunction(fn) {
   if (typeof fn !== 'function') return false;
   if (isFnRegex.test(Function.prototype.toString.call(fn))) return true;
   return Object.getPrototypeOf(fn) === GeneratorFunction;
-}
+};

packages/side-channel/index.js

@@ -35,4 +35,4 @@ module.exports = () => {
     }
   };
   return { get, set, has, assert };
-}
+};