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In this article, the editor introduces in detail "what is the concept of vue two-way binding", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "what is the concept of vue two-way binding" can help you solve your doubts.

The meaning of vue bi-directional binding is that when the data changes, the view will also change, and once the view changes, the data will change synchronously. The core method of data binding is the "Object.defineProperty (obj,prop,descriptor)" method.

This article operating environment: windows10 system, Vue2.9.6 version, DELL G3 computer.

What is the conceptual meaning of vue two-way binding

Vue is a mvvm framework, that is, two-way data binding

That is, when the data changes, the view changes, and when the view changes, the data changes synchronously.

This is the essence of vue. It is worth noting that the two-way data binding we are talking about must be for UI controls, and non-UI controls will not involve two-way data binding. One-way data binding is a prerequisite for the use of state management tools such as redux. If we use vuex, then the data flow is also singleton, which will conflict with two-way data binding.

Why implement two-way binding of data?

In vue, if you use vuex, the data is actually unidirectional. The reason why it is said to be bidirectional data binding is that it uses UI controls. For us to deal with forms, vue bidirectional data binding is particularly comfortable.

That is, the two are not mutually exclusive, and a single item is used in the global data flow to facilitate tracking; the local data flow is bidirectional, which is simple and easy to operate.

Vue two-way binding, the core is the Object.defineProperty () method, then we will briefly introduce!

Syntax:

Object.defineProperty (obj,prop,descriptor)

Where:

Obj

The object on which you want to define the property.

Prop

The name of the property to define or modify.

Descriptor

The property descriptor to be defined or modified.

In fact, to put it simply, it is through this method to define a value.

Called, using the get method

Assignment, using the set method.

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