diff --git a/package.json b/package.json
index f972839..3612c94 100644
--- a/package.json
+++ b/package.json
@@ -2,17 +2,23 @@
   "name": "picocolors",
   "version": "0.0.1",
   "type": "module",
-  "main": "picocolors.js",
-  "module": "picocolors.js",
-  "exports": "picocolors.js",
+  "main": "./picocolors.cjs",
+  "module": "./picocolors.js",
+  "exports": {
+    ".": {
+      "require": "./picocolors.cjs",
+      "import": "./picocolors.js",
+      "default": "./picocolors.js"
+    },
+    "./package.json": "./package.json"
+  },
   "sideEffects": false,
   "description": "The tiniest and the fastest coloring library ever",
   "scripts": {
     "test": "node test.js"
   },
   "files": [
-    "picocolors.d.ts",
-    "picocolors.js.flow"
+    "picocolors.*"
   ],
   "keywords": [
     "terminal",
diff --git a/picocolors.cjs b/picocolors.cjs
new file mode 100644
index 0000000..f7c8c2e
--- /dev/null
+++ b/picocolors.cjs
@@ -0,0 +1,56 @@
+let tty = require("tty");
+
+let isColorSupported =
+  !("NO_COLOR" in process.env || process.argv.includes("--no-color")) &&
+  ("FORCE_COLOR" in process.env ||
+    process.argv.includes("--color") ||
+    process.platform === "win32" ||
+    (tty.isatty(1) && process.env.TERM !== "dumb") ||
+    "CI" in process.env);
+
+function formatter(open, close, replace = open) {
+  return isColorSupported
+    ? (string) => {
+        let index = string.indexOf(close, open.length);
+        return !~index
+          ? open + string + close
+          : open + replaceClose(string, close, replace, index) + close;
+      }
+    : (string) => string;
+}
+
+function replaceClose(string, close, replace, index) {
+  if (!~index) return string;
+  let start = string.substring(0, index) + replace;
+  let end = string.substring(index + close.length);
+  return start + replaceClose(end, close, replace, end.indexOf(close));
+}
+
+module.exports = {
+  isColorSupported,
+  reset: (s) => `\x1b[0m${s}\x1b[0m`,
+  bold: formatter("\x1b[1m", "\x1b[22m", "\x1b[22m\x1b[1m"),
+  dim: formatter("\x1b[2m", "\x1b[22m", "\x1b[22m\x1b[2m"),
+  italic: formatter("\x1b[3m", "\x1b[23m"),
+  underline: formatter("\x1b[4m", "\x1b[24m"),
+  inverse: formatter("\x1b[7m", "\x1b[27m"),
+  hidden: formatter("\x1b[8m", "\x1b[28m"),
+  strikethrough: formatter("\x1b[9m", "\x1b[29m"),
+  black: formatter("\x1b[30m", "\x1b[39m"),
+  red: formatter("\x1b[31m", "\x1b[39m"),
+  green: formatter("\x1b[32m", "\x1b[39m"),
+  yellow: formatter("\x1b[33m", "\x1b[39m"),
+  blue: formatter("\x1b[34m", "\x1b[39m"),
+  magenta: formatter("\x1b[35m", "\x1b[39m"),
+  cyan: formatter("\x1b[36m", "\x1b[39m"),
+  white: formatter("\x1b[37m", "\x1b[39m"),
+  gray: formatter("\x1b[90m", "\x1b[39m"),
+  bgBlack: formatter("\x1b[40m", "\x1b[49m"),
+  bgRed: formatter("\x1b[41m", "\x1b[49m"),
+  bgGreen: formatter("\x1b[42m", "\x1b[49m"),
+  bgYellow: formatter("\x1b[43m", "\x1b[49m"),
+  bgBlue: formatter("\x1b[44m", "\x1b[49m"),
+  bgMagenta: formatter("\x1b[45m", "\x1b[49m"),
+  bgCyan: formatter("\x1b[46m", "\x1b[49m"),
+  bgWhite: formatter("\x1b[47m", "\x1b[49m"),
+};