Html.md

render the data

it is better to choose class selector when data needs to be rendered. 需要数据渲染的时候，注意选择标签尽量用类名去选择。 然后用展开运算符指定一个根元素

use tags

html5 tags is in priority

some attributue should be deprecated

The detail should be showed in MDN. It is deprecated to use summary in table

script tag

please remember the content of script is just JS. it is not a JS function.

attribute and property

The attribute belongs to HTML standard The property belongs to Dom standard

Once you get an element

Attribute is a child key of the property of an element.

data flow

property can be modified once attribute is modified attribute不会同步property上的值； attribute和property之间的数据绑定是单向的，attribute->property； 更改property和attribute上的任意值，都会将更新反映到HTML页面中；