I am trying to debug a property which is in an Angular 6 component. Naturally it is called in code trough this
variable -> this.model
. I am debugging it at the moment and would like to add it as a watch expression in Chrome dev tools so I can see how it changes trough the execution of the code. I tried just adding this.model
as a watch expression, however it returns undefined, as this
refers to the window
object, which doesn't have a model
property, so I am getting undefined
on my watch expression.
What would be the proper way to watch this.model
?
since the code is transpiled to js while executing, the reference of this
changes. You can watch the _this
instead. It will give you the instance of the component/service that you want to debug.
use Augury
It logs all controller variables.
There is one alternative but a little complex way also there by using a life cycle hook DoCheck
. It keeps invoking a custom change-detection function ngDoCheck()
.
So, create this function in your component class and add console.log
inside it. Eg:
ngDoCheck() {
console.log(this.numberGiven);
}
Finally, just add a breakpoint inside this function whenever you want to watch any variable as shown in this image .
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