js面试总结

1.html

<1>localstorage,sessionstorage,cookie区别

2.css

<1>link和@import区别

link优先级高于@import

link兼容性好

link异步，@import同步

3.js

  console.log(null==undefined)//true
  console.log(Boolean(0))//false
  console.log(Boolean(10))//true
  console.log(Boolean('10'))//true
  console.log(NaN==NaN)//false
  console.log(NaN==0)//false