Proxy API usage scenarios —— Trace Method Call

trace-method-call.js

function traceMethodCall(obj) {
  const handler = {
    get(target, propKey, receiver) {
      const propValue = target[propKey]; // Get the original method
      return typeof propValue !== "function"
        ? propValue
        : function (...args) {
            const result = propValue.apply(this, args);
            console.log(
              `Call ${propKey} method -> ${JSON.stringify(result)}`
            );
            return result;
          };
    },
  };
  return new Proxy(obj, handler);
}