This problem of $on () in vue

Vue.prototype.bus=new Vue ();

    Vue.component("child",{
        template:`<div @click="handleClick">{{text}}</div>`,
        props:{
            content:[String,Number]
        },
        data(){
            return {
                text:this.content
            }
        },
        methods:{
            handleClick(){
                this.bus.$emit("change",this.text)
            }
        },
        mounted(){
            var _this=this
            console.log(_this);
            this.bus.$on("change",function (msg) {
                    _this.text=msg
                    console.log(this);
            })
        }
    })
    var vm = new Vue({
        el:"-sharpapp",
    })

this.bus.$on in the above code ("change",function (msg) {

)
                    _this.text=msg
                    console.log(this);
            })
        }
Who does the this in the callback function in

point to? I hope the boss can help me with the answer. Thank you

.
Apr.11,2021

Vue.prototype.bus = new Vue(); // <- 

//  
this.bus.$on('change',function (msg) {
                    _this.text=msg
                    console.log(this === _this.bus); // true
            })

is an empty Vue object coming out of bus, by new, because the callback for this event is called by bus.
JSFiddle you can compare the log,bus of the console without VNode

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3e869-2c429.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3e869-2c429.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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