JS dom most commonly used API

Document Method:
var cont = document.getelementbyidx_x (' cont ');

ClassName Adding class to tags
Cont.classname = ' Fcolor ';

The SetAttribute method can add some properties, but not CSS styles!
var a_id = document.getelementbyidx_x (' a_id ');
A_id.setattribute (' href ', ' http://www.oeeee.com ');

What is produced by getattribute
var A_att = a_id.getattribute (' href ');
document.write (' getattribute ' generated content: ' + A_att + ' <br> ' + ' <br> ');

What is produced by removeattribute
var A_att = a_id.removeattribute (' href ');
document.write (' RemoveAttribute after the content: ' + A_att + ' <br> ' + ' <br> ');

innerHTML Getting HTML content
document.write (' InnerHTML ' generated content: ' + cont.innerhtml + ' <br> ');

The Getelementsbytagname_r () method returns a collection of objects with the specified label name, not commonly used
var div = document.getelementsbytagname_r (' div ');
document.write (' Getelementbytagname () generated content: ' + div.length + ' <br> ');

Document.body returns the BODY element tag
var dom_body = document.body;
Dom_body.setattribute (' bgcolor ', ' #186376 ');


var txt = dom_body.createtextnode (' DFSDFSDJFFDSF ');
var p = dom_body.createelement_x (' P ');
P.appendchild (TXT);
Dom_body.appendchild (P);

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2. Document Method:
4. getElementById (ID) node returns a reference to the specified node.
6. Getelementsbytagname_r (name) NodeList returns a collection of all matching elements in the document
8. createelement_x (name) node node
10. createTextNode (text) node creates a plain text node
12. Ownerdocument document points to the documentation that this node belongs to
14. DocumentElement node returns HTML nodes
16. Document.body node returns to the body nodes
20. Element method:
22. GetAttribute (AttributeName) String returns the value of the specified property
24. SetAttribute (Attributename,value) String assigns a value to a property
26. RemoveAttribute (attributename) String removes the specified property and its value
28. Getelementsbytagname_r (name) NodeList returns a collection of all matching elements within a node
32. Node Method:
34. AppendChild (Child) node adds a new sub-node to the specified node.
36. RemoveChild (Child) node removes sub-nodes of the specified node
38. ReplaceChild (newchild,oldchild) node replaces the child nodes of the specified node
40. InsertBefore (newchild,refchild) node inserts a new node in front of the node at the same level
42. HasChildNodes () Boolean returns True if the node has a child node.
46. Node Property:
48. NodeName string holds the name of the node in the form of a string
50. NodeType String type of node to be stored in integer data format
52. NodeValue String holds the value of the node in the available format
54. ParentNode node's reference to the parent node of the node point
56. ChildNodes NodeList A collection of references that point to a child node
58. FirstChild node refers to the first sub-node in the binding of a child node
60. LastChild node refers to the last sub-node in the Union of child nodes
62. PreviousSibling node points to the previous sibling; If the node is a sibling node, the value is null
64. NextSibling node points to the latter sibling, and if the node is a sibling node, the value is null

JS dom most commonly used API