Ionic3 / Angular2 view render multiple time

@duannx wrote:

I created a new ionic 3 project. In my HomePage, i have only one varible and one function:

count = 0;
printLog() {
    console.log("count", ++this.count);
}

In template home.html i call this function by interpolation binding:

{{printLog()}}
It is my whole code. In the console i see the log:

As we can see the printLog function were called 9 times. I can't understand why. Can someone tell me why and how it work?
Many thanks!

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