add validation checks, move polyfills so os and std functions work

qjs.c

@@ -496,23 +496,6 @@ int main(int argc, char **argv)
             eval_buf(ctx, str, strlen(str), "<input>", JS_EVAL_TYPE_MODULE);
         }
 
-        //POLYFILLS BEGIN 
-        const char *pf = "async function require(x) {\n"
-                    "    const y = await import(x);" // use dynamic import.
-                    "    return y;\n"
-                    "}\n"
-                    "globalThis.require = require;\n"
-                    "globalThis.setTimeout = os.setTimeout;\n"
-                    "globalThis.clearTimeout = os.clearTimeout;\n"
-                    "globalThis.sleep = os.sleep;\n"
-                    "globalThis.urlGet = std.urlGet;\n"
-                    "globalThis.loadFile = std.loadFile;\n"
-                    "globalThis.printf = std.printf;\n"
-                    "globalThis.evalFile = std.loadScript;\n"
-                    "globalThis.getURL = std.urlGet;\n"
-                    "globalThis.global = globalThis;\n";
-        eval_buf(ctx, pf, strlen(pf), "<input>", JS_EVAL_TYPE_MODULE);
-
 
         for(i = 0; i < include_count; i++) {
             if (eval_file(ctx, include_list[i], module))
@@ -535,6 +518,38 @@ int main(int argc, char **argv)
         if (interactive) {
             js_std_eval_binary(ctx, qjsc_repl, qjsc_repl_size, 0);
         }
+
+        //POLYFILLS BEGIN 
+        const char *pf = "async function require(x) {\n"
+                 "    const y = await import(x);\n"
+                 "    return y;\n"
+                 "}\n"
+                 "globalThis.require = require;\n"
+                 "globalThis.global = globalThis;\n"
+                 "global.console.error = console.log\n"
+                 "global.console.warn = console.log\n"
+                 "\n"
+                 "if (typeof os !== 'undefined') {\n"
+                 "    globalThis.setTimeout = os.setTimeout;\n"
+                 "    globalThis.clearTimeout = os.clearTimeout;\n"
+                 "    globalThis.sleep = os.sleep;\n"
+                 "} else {\n"
+                 "    console.error('os is not defined.');\n"
+                 "}\n"
+                 "\n"
+                 "if (typeof std !== 'undefined') {\n"
+                 "    globalThis.urlGet = std.urlGet;\n"
+                 "    globalThis.loadFile = std.loadFile;\n"
+                 "    globalThis.printf = std.printf;\n"
+                 "    globalThis.evalFile = std.loadScript;\n"
+                 "    globalThis.getURL = std.urlGet;\n"
+                 "} else {\n"
+                 "    console.error('std is not defined.');\n"
+                 "}\n";
+
+
+        eval_buf(ctx, pf, strlen(pf), "<input>", JS_EVAL_TYPE_MODULE);
+        
         js_std_loop(ctx);
     }