题解 | #CSS选择器——标签、类、ID选择器#

{"css":"/*补全代码*/\ndiv{\n    color: rgb(255,0,0);    \n    font-size: 20px;\n}\n\n.green{\n    color: rgb(0, 128, 0);\n}\n\n#black{\n    color: rgb(0,0,0);\n}","js":"","html":"<div>红色</div>\n<div class='green'>绿色</div>\n<div id='black'>黑色</div>\n","libs":[]}

div直接作用到所有的div标签内容 .选择class, 覆盖div的设置 #选择id, 覆盖div的设置