摘要:
class Person { constructor(name) { this.name = name } publicFn() { console.log('公共方法') } } class Student extends Person { constructor(name, score) { / 阅读全文
摘要:
dom结构: <h1><b>h1</b></h1> <h2><b>h2</b></h2> <h3><b>h3</b></h3> <h4><b>h4</b></h4> <h5><b>h5</b></h5> <h6><b>h6</b></h6> css: h1 > b, h2 > b, h3 > 阅读全文