Remove the dotted line of the label hyperlink

Label in this article: The dotted box after tag a is clicked. css removes the dotted box after tag a is clicked, and JS removes the dotted box after tag a is clicked, remove the dotted box of the label hyperlink. How can I remove the dotted box of the label hyperlink so that the label does not have a dotted box?

Method 1:
Add the syntax to the link
For example:
Text Link: link text
Image Link
It is not hard to see that the onfocus = "this. blur ()" syntax must be placed in href.

Method 2:
The disadvantage of method 1 is that each link has to be added with such a syntax. Is there a correct syntax ~ Of course, the following methods can be easily implemented ~~~ Use the JS syntax to delete all link dotted lines by adding the following syntax between and

Method 3:

Add code between zones