Improve way observable works

[paustint]

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I think the usage of the observable is confusing.

• Why do I have to pass in left and right AND an observable? I should have the option to just pass in an observable or just left/right
• I think that the properties on the observable should be consistent with the other properties (e.x. rename leftContent to left)
• Is the observable the only way to get a render update if the data changes? If so, this should be called out in the documentation.
  • Also, it might be useful for me to just update the @Input() and if left or right changes, then it should trigger a re-comparison (e.x. listen to ngOnChanges())

[vishnu-dev]

Changing input parameters doesn't change the comparison. How do I manually trigger change.