I attempted
this.propositionService.addProposition(this.proposition)
.subscribe(this.addSuccessCallback, this.addFailureCallback);
The issue I am encountering is that both addSuccessCallback and addFailureCallback do not have access to the this object. I prefer to avoid using embedded lambda expressions as it makes the code less tidy.
To link the component's this context to the callbacks, you can utilize the bind method as shown below:
this.propositionService.addProposition(this.proposition)
.subscribe(this.addSuccessCallback.bind(this), this.addFailureCallback.bind(this));
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