feat: add "lite" mode;

- copied from `default` mode
- removes Set, Map, TypedArray support
- has `dequal/lite` support parity

.gitignore

@@ -3,4 +3,6 @@ node_modules
 *-lock.*
 *.lock
 *.log
-dist
+
+/dist
+/lite

package.json

@@ -17,6 +17,10 @@
     "*.d.ts",
     "dist"
   ],
+  "modes": {
+    "default": "src/index.js",
+    "lite": "src/lite.js"
+  },
   "engines": {
     "node": ">= 8"
   },

src/lite.js

@@ -0,0 +1,51 @@
+export function klona(x) {
+	if (typeof x !== 'object') return x;
+
+	var k, tmp, str=Object.prototype.toString.call(x);
+
+	if (str === '[object Object]') {
+		if (x.constructor !== Object && typeof x.constructor === 'function') {
+			tmp = new x.constructor();
+			for (k in x) {
+				if (tmp.hasOwnProperty(k) && tmp[k] !== x[k]) {
+					tmp[k] = klona(x[k]);
+				}
+			}
+		} else {
+			tmp = {}; // null
+			for (k in x) {
+				if (k === '__proto__') {
+					Object.defineProperty(tmp, k, {
+						value: klona(x[k]),
+						configurable: true,
+						enumerable: true,
+						writable: true,
+					});
+				} else {
+					tmp[k] = klona(x[k]);
+				}
+			}
+		}
+		return tmp;
+	}
+
+	if (str === '[object Array]') {
+		k = x.length;
+		for (tmp=Array(k); k--;) {
+			tmp[k] = klona(x[k]);
+		}
+		return tmp;
+	}
+
+	if (str === '[object Date]') {
+		return new Date(+x);
+	}
+
+	if (str === '[object RegExp]') {
+		tmp = new RegExp(x.source, x.flags);
+		tmp.lastIndex = x.lastIndex;
+		return tmp;
+	}
+
+	return x;
+}