The principle of v-model in vue

In the process of getting started with Vue, I found that the two-way data binding of v-model is very useful. I found out that v-model is just a syntactic sugar. The specific example is as follows

<input v-model="sth">

In fact, he is equivalent to the following:

<input v-bind:value="sth" v-on:input="sth=$event.target.value">

Since html5, every input will trigger the oninput event, so the input content will be bound to sth when input, so the value of sth will be changed