如何避免在外部脚本中使用 document.write

Question

I want to avoid or replace the document.write loading through an external script. here the link //lv.adocean.pl/files/js/aomini.js

I tried this (answered by someone) but it didn't help.

document.write=function(s){
    var scripts = document.getElementsByTagName('script');
    var lastScript = scripts[scripts.length-1];
    lastScript.insertAdjacentHTML("beforebegin", s);
}

Any idea?

Answer 1

I will try to explain @freedomm-m's suggestion, hoping to be clear.

To re-assign document.write , which returns a function, to an "empty function" ... could do the trick to avoid the "normal" execution of document.write .

By "empty function" , I mean a totally valid function, but doing strictly nothing.

So after that re-assignment, every times the document.write function will be called anywhere in the document, instead of executing the write function found under the document object's property, it will execute that "empty function" (read: Nothing).

Here is a demo of that principle applyed on the console.log function, just to keep it simple and be obvious in this demo here.

 console.log("I am executing...") console.log("I am executing too...") // Assing an empty function console.log = function(){} console.log("I am NOT executing!") console.log("I feel useless now... :( ")

Now to "temporarly" avoid a function execution, you have to store it in another variable in order to "undo" the re-assigment...

 console.log("I am executing...") console.log("I am executing too...") // Assign the function to a variable let tempStorageOfTheDisabledFunction = console.log // Assing an empty function console.log = function(){} console.log("I am NOT executing!") console.log("I feel useless... :( ") // Restore the original function console.log = tempStorageOfTheDisabledFunction console.log("Yeah! I'm back in play!") console.log("I feel better.")

So now, what fredomm-m suggested to try is:

<script>document.write = function(){}</script>
<script src="path-to-external-js"></script>