Explain two-way data binding and provide input binding syntax
Tests whether you see two-way binding as sugar for value binding plus an input event. Strong answer: show one syntax, then explain the prop-out, event-in pattern. Red flag: syntax only with no mention of change detection or unidirectional flow.
Tests whether you understand two-way binding as syntactic sugar over unidirectional flow, not magic. A strong candidate picks one framework, writes the correct syntax, and immediately explains the underlying mechanism: the input receives the bound value, and user changes emit an event that updates the source. Red flag: stopping at syntax, confusing true two-way binding with manual event wiring, or claiming it breaks unidirectional flow without explaining how frameworks reconcile it.
Read the original → angular.dev
- #two-way binding
- #vue
- #angular
- #svelte
- #reactivity
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