Orientation of css selector element

Theoretical study Address: https://www.runoob.com/cssref/css-selectors.html

Example:

1.

2.

 Special note: where  class = " form-Selected Control Untouched the checked-ng ng ng-Pristine-invalid", refers to one or more of the class name (classname), positioning can be used in which one or more

 3.

[attribute*=value]

a[src*="runoob"]

Selecting each of the src attribute value contains the substring "runoob" element

4.