Exploring Techniques for Streamlining HTML/CSS Editing in Browser

Is there a way to automatically edit specific lines on websites right after they load? Specifically, I want to change <div class="1"> to 

<div class="1" style="display:none">
, and 
<div class="2" style="display:none">
to <div class="2">. The lines to be edited will be the same across multiple sites, but the exact location may vary so it would require a search. Whether this editing occurs before or after the page loads is not a concern for me. I have looked into tools like Tampermonkey and Stylus, but I'm open to other solutions as well.

htmlcssgoogle-chrometampermonkey

Answer №1

Here's a useful code snippet.

// Locate and select the first element with the class name "1"
const divOne = document.getElementsByClassName("1")[0];
changeDisplayOnElement(divOne);
// Do the same for an element with the class name "2"
const divTwo = document.getElementsByClassName("2")[0];
changeDisplayOnElement(divTwo);

// Toggle between displaying and hiding elements based on their current style

function changeDisplayOnElement(element){
   element.style.display = element.style.display === "none" ? "block" : "none";
}

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