### Inquire
+ Document.querySelector ( '.class / ID # / Li') [obtained according to the selector (class name, id, tag name) node can acquire a, returns a node ]
+ Document.querySelectorAll ( '.class / ID # / Li') [obtained according to the selector (class name, id, tag name) node, retrieves all, returns an array ]
### modified
+ Ele.innerHTML = '<h1> hello word <h1>' [innerHTML This property analysis values of labels, typically used to dynamically generate ]
+ Ele.innerTEXT = 'hello word' [innerTEXT this property only resolves to a string, with very little]
### increase
+