$event.target.value 是 javascript 命令还是 vue.js 命令？

Question

I have this line in my vue.js application

<input type="text" v-on:input="cssClass=$event.target.value">

I know that in javascript I can get event.target.value. I think that the above code is Vue.js specific code, but I'm not sure. Need confirmation.

Answer 1

v-on:input will consume the actual DOM event of the input initially, store against $event , a special variable, and then make it available to the function being called. In this case you access $event.target.value to get the newly input value from the event. Methods in Inline Handlers

Hope that helps.

Answer 2

You can use $event because of VueJS. Angular2 also has the same special variable. What exactly $event object do in Angular 2?