这样写有问题吗
<!DOCTYPE html><html><head> <title></title> <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script></head><body> <div id="root"> <div v-on:click="handleClick">{{msg}}</div> </div> <script type="text/javascript"> new Vue({ el : "#root", data : { msg : "hello" }, methods : { handleClick : function () { this.msg : "world" } } }) </script></body></html>把methods删掉就很正常，不知道为什么
