题解 | #点击按钮隐藏元素#

{"css":".box {\n    width: 100px;\n    height: 100px;\n    border: solid 1px black;\n    /*补全代码*/\n    position: relative;\n}\n.btn{\n    width: 20px;\n    height: 20px;\n    background-color: red;\n    /*补全代码*/\n    position: absolute;\n    right:-10px;\n    top:-10px;\n    text-align:center;\n    line-height:20px;\n}","js":"var btn = document.querySelector('.btn');\nvar box = document.querySelector('.box');\nbtn.onclick = function(){\n    // 补全代码\n    box.style.display = 'none'\n}","html":"<div class='box'>\n\t<div class='btn'>X</div>\n</div>","libs":[]}