1.css way to introduce pattern, which has several?
1 "<link href =" "> introduced externally style
2 "<div style =" "> introduced into the </ div> OK
3 "<head> style introduced inside
<style></style>
</head>
2. Talk about the priority comparing various css selectors?
!important >行内style > #id > .class > div
3.css3 What's new advanced properties?
transition to the transition of property takes time motion curve start time
transfrom
box-shadow
border-radius
name of the custom animation from animated motion animation duration frequency curve Plays reverse
outline
4.html5 What are the new label?
header
are not
video
audio
section
aside
footer
menu
section
The difference 5.undefined and null?
undefined undefined,
null is defined, but no assignment.
6.window.onload and $ (document) .ready () What is the difference?
A page can have multiple $ (document) .ready () method, multiple methods can be performed, which is jquery, it does not wait for the picture to load, just waiting for pages to load. (It is shorthand for $ (function () {}));
And a page can have only one window.onload = function () {}, if a write, the latter will overwrite the previous, this is js, it has to wait for the page to load, but also wait for the picture to load after completion carried out.