Why can't I see ngOnChanges logged in my application

I am new to Angular and am trying to get a hold of life cycle hooks. However, I am confused because what I see in my code doesn't go along with the documentation.

I have following code in my component class:

ngOnInit() {
    console.log("ngOnInit", this.personList);
    this.person = this.pService.getName();
}

ngOnChanges() {
    console.log("ngOnChanges", this.personList, arguments);
}

ngDoCheck() {
    console.log("ngDoCheck", this.personList, arguments);
}

ngAfterContentInit() {
    console.log("ngAfterContentInit", this.personList, arguments);
}

ngAfterViewInit() {
    console.log("ngAfterViewInit", this.personList, arguments);
}

ngAfterViewChecked() {
    console.log("ngAfterViewChecked", this.personList, arguments);
}

ngAfterContentChecked() {
    console.log("ngAfterContentChecked", this.personList, arguments);
}

ngOnDestroy() {
    console.log("ngOnDestroy", this.personList, arguments);
}

changeclr() {
        this.person = this.name === 'Saurabh' ? 'Navanshu' : 'Saurabh';
}

The docs here says ngOnchanges gets triggered before ngonInit but I can't see any logs for ngOnChanges while application loads.

The docs also says ngOnChnages runs while data-bound property changes. Is it specific to properties set using @Input, because I can't see any logs while I change this.person using my changclr method.

Am I getting something wrong here ?