Poor mans React dev tools

poorMansDevTool.js

var hook = {
    inject: (renderer) => {
        var oldMountComponent = renderer.Reconciler.mountComponent,
            oldPerformUpdateIfNecessary = renderer.Reconciler.performUpdateIfNecessary,
            oldReceiveComponent = renderer.Reconciler.receiveComponent,
            oldUnmountcomponent = renderer.Reconciler.unmountComponent;

        renderer.Reconciler.mountComponent = function overrideMountComponent() {
            hook.emit('mountComponent', Array.prototype.slice.call(arguments));
            return oldMountComponent.apply(renderer.Reconciler, arguments);
        }

        renderer.Reconciler.performUpdateIfNecessaryComponent = function overridePerformUpdateIfNecessaryComponent() {
            hook.emit('performUpdateIfNecessaryComponent', Array.prototype.slice.call(arguments));
            return oldPerformUpdateIfNecessary.apply(renderer.Reconciler, arguments);
        }

        renderer.Reconciler.receiveComponent = function overridReceiveComponent() {
            hook.emit('receiveComponent', Array.prototype.slice.call(arguments));
            return oldReceiveComponent.apply(renderer.Reconciler, arguments);
        }

        renderer.Reconciler.unmountComponent = function overridUnmountComponent() {
            hook.emit('unmountComponent', Array.prototype.slice.call(arguments));
            return oldUnmountcomponent.apply(renderer.Reconciler, arguments);
        }
    },
    emit: (eventName, value) => {
        console.log(eventName, value);
    }
};
window.__REACT_DEVTOOLS_GLOBAL_HOOK__ = hook;