Simple example how V8 can compile JavaScript source and run it

v8-compile-javascript-example.cc

// Create a new context.
Local<Context> context = Context::New(isolate);

// Enter the context for compiling and running the hello world script.
Context::Scope context_scope(context);

// Create a string containing the JavaScript source code.
Local<String> source = String::NewFromUtf8(isolate, "'Hello' + ', World!'");

// Compile the source code.
Local<Script> script = Script::Compile(source);

// Run the script to get the result.
Local<Value> result = script->Run();

// Convert the result to an UTF8 string and print it.
String::Utf8Value utf8(result);
printf("%s\n", *utf8);