Monitor Occasions and Operate Calls through Console

Regardless of having labored on the very complicated Firefox for various years, I will at all times love plain outdated console.log debugging. Logging can present an audit path as occasions occur and textual content you may share with others. Do you know that chrome gives monitorEvents and monitor in an effort to get a log every time an occasion happens or operate known as?

Monitor Occasions

Go a component and a sequence of occasions to monitorEvents to get a console log when the occasion occurs:

// Monitor any clicks inside the window
monitorEvents(window, 'click on')

// Monitor for keyup and keydown occasions on the physique
monitorEvents(doc.physique, ['keyup', 'keydown'])

You’ll be able to move an array of occasions to hear for a number of occasions. The logged occasion represents the identical occasion you’d see in case you manually known as addEventListener.

Monitor Operate Calls

The monitor methodology means that you can hear for calls on a particular operate:

// Outline a pattern operate
operate myFn() { }
// Monitor it
monitor(myFn)

// Utilization 1: Primary name
myFn()
// operate myFn known as

// Utilization 2: Arguments
myFn(1)
// operate myFn known as with arguments: 1

I actually like you can view the arguments supplied, which is nice for inspecting.

I often go for logpoints as a substitute of embedding console statements in code, however monitor and monitorEvents present a substitute for each.