vue第一次获取不到元素的解决方法记录

this.$nextTick(callback)
methods: {
    play() {
        //获取元素
        console.log($('#video'));
        this.$nextTick(function() {
            //获取元素
            console.log($('#video'));
        });
    }
}

setTimeOut(fn, 0)
methods:{
    play() {
        //获取元素
        console.log($('#video'));
        setTimeOut(function(){
            //获取元素
            console.log($('#video'));
        }, 0);
    }
}

@opened
<el-dialog @opened="play"></el-dialog>
 
methods: {
    play() {
        //获取元素
        console.log($('#video'));
    }
}