Mention one-way binding in guide’s comparison with Angular

[roryokane]

The framework comparison page (src/guide/comparison.md) describes four ways that Vue is different from Angular 1. However, it doesn’t mention that Vue supports and defaults to one-way binding between components, while Angular only supports two-way binding.

I think readers would want to know about this difference. For example, this HN commenter who Evan replied to said he wouldn’t use Vue because it uses two-way binding. If the comparison had mentioned the use of one-way binding, people like him wouldn’t be put off.

You might say something like this. I’m not sure that this is accurate, though, as I have only ever used Angular:

• While Angular uses two-way binding, Vue also supports, and defaults to, one-way binding between components. Using one-way binding makes the flow of data easier to reason about in large apps.