Recipes

Basic QuickJS Recipe

This guide demonstrates a simple usage of the QuickJS JavaScript engine in C programming language.

Ingredients

• QuickJS Library
• C Programming Environment (like GCC)

Steps

1. Conversion to C String

   You can get the string representation of a JSValue using JS_ToCString(). This function takes the JS context and the JS value as its arguments.

   const char *c_str = JS_ToCString(ctx, val);

2. Strict Equality Check

   QuickJS provides the function js_strict_eq() for checking the strict equality (===) of two JS values.

   Here is an example that checks if new_target is strictly equal to the global String object.

   int is_equal = js_strict_eq(
    ctx,
    new_target,
    JS_GetPropertyValue(ctx, ctx->global_obj, JS_NewString(ctx, "String"))
   );