Everything? Here is what the recommended use of two-way binding does in VueJS: "You can use the v-model directive to create two-way data bindings on form inpu

Everything? Here is what the recommended use of two-way binding does in VueJS: "You can use the v-model directive to create two-way data bindings on form input and textarea elements. It automatically picks the correct way to update the element based on the input type. Although a bit magical, v-model is essentially syntax sugar for updating data on user input events, plus special care for some edge cases." Seems like a very specific, deliberate functionality. Changing a value of a reference from a parent component, however, is advised against and is probably what you're referring to.