Fix that whole export debacle (#1370)

* Re-add setting exports

* Update webpack.production.config.js

* Update mod.js

* Slight change

* Update mod.js

* Update webpack.production.config.js

* Update webpack.config.js

gulp/mod.js

@@ -1,3 +1,39 @@
-module.exports = function (source, map) {
-    return source + `\nexport let $s=(n,v)=>eval(n+"=v")`;
+const oneExport = exp => {
+    return `${exp}=v`; // No checks needed
+};
+
+const twoExports = (exp1, exp2) => {
+    return `n=="${exp1}"?${exp1}=v:${exp2}=v`;
+};
+
+const multiExports = exps => {
+    exps = exps.map(exp => `case "${exp}":${exp}=v;break;`);
+
+    return `switch(n){${exps.toString().replaceAll(";,", ";")} }`;
+};
+
+const defineFnBody = source => {
+    const regex = /export (?:let|class) (?<name>\w+)/g;
+    let names = [...source.matchAll(regex)].map(n => n.groups.name);
+    switch (names.length) {
+        case 0:
+            return false;
+        case 1:
+            return oneExport(names[0]);
+        case 2:
+            return twoExports(names[0], names[1]);
+        default:
+            return multiExports(names);
+    }
+};
+/**
+ *
+ * @param {string} source
+ * @param {*} map
+ * @returns
+ */
+module.exports = function (source, map) {
+    const body = defineFnBody(source);
+    if (!body) return source;
+    return source + `\nexport const __$S__=(n,v)=>{${body}}`;
 };