Looking for an addon to automatically select all instances of selected word in the current page

Question

I am looking for an addon to install so that when you select a word in a webpage ( by clicking) it automatically highlights all the instances of that selected words in that

Answer 1

Well, my code is quite complex because it performs several advanced services, but if you're asking how to highlight a word of text, the easiest way is to add a style attribute around the word. For example:

This hot dog needs more mustard.

... would become...

This hot dog needs more mustard.

The above would highlight "dog" in the sentence. The above assumes white text on black background, where yellow is a good highlight color. If the text is black on white background, that #FFFF60 should probably be something like #40FFC0 or #40FF40 or #4040FF or whatever you find looks good.

When you want to remove the highlight, you can delete the element. In my case I usually put the style="color:#FFFF60" in some other existing element, so I don't delete the element to remove the highlight, I delete the style attribute I added to the element.

By the way, the reason I change text color to highlight terms is because that does not change the size of the word, and therefore the text never reflows (and screws up formatting). You could probably change background color to highlight, but I never tried that.

To find all instances of a certain word, I don't know, but probably the TreeWalker is part of the solution.