how can the value of an href attribute be changed using javascript/css?

Question

Assuming that the html contains the following structure:

    text


         


        

Answer 1

You could do it without id:

document.querySelector("a[href^='http://the']")

and set the href prop:

document.querySelector("a[href^='http://the']").href=whatever

For a full reference (browser-compatibility) of querySelector see the MDN-Article