how to get selected value in vuejs code example

Example 1: target data option select vue js

methods:{
    onChange: function(e){
        var id = e.target.value;
        var name = e.target.options[e.target.options.selectedIndex].text;
        console.log('id ',id );
        console.log('name ',name );
    },


 <select name="customerName" id="" v-on:change="onChangeSite($event)">
         <option value="1">Jan</option>
         <option value="2">Doe</option>
         <option value="3">Khan</option>
   </select>

Example 2: target data option select vue js

methods: {
    handleChange(e) {
        if(e.target.options.selectedIndex > -1) {
            console.log(e.target.options[e.target.options.selectedIndex].dataset.foo)
        }
    }
}