点击按钮弹框的出现以及有关闭的按钮

利用的es6+jQuery来实现的效果
const bth=document.getElementById('bth');
const shadow =document.getElementById('shadow');

bth.addEventListener('click', (e)=> {
       shadow.className='shadow show';
    return false

},false)
//弹框的出现
shadow.addEventListener('click',(e)=>{
    const target=e.target;
    const _class=target.className;
    if(_class.includes('shadow')||_class.includes('close')){
        shadow.className='shadow'
    }
    return false
},false)
//弹框的关闭