js-considerations for getting elements and attributes

There are three ways to get elements in JS: getElementById () getElementsByTagName Getelementsbyclass ()

1.getElementById (ID)

The function parameters contained in parentheses are added in English double quotation marks "" ;

2.getElementsByTagName (TAG)

returned is an array of !

3.getElementsByClassName (Class)

The return is an array !

How to Get Properties in JS GetAttribute (attribute)

The GetAttribute (attribute) property is not part of the document object, so it cannot be called through the Document object, but only through the element object.

Set Property Object.setattribute (Attribute,value)

js-considerations for getting elements and attributes