New Userscript

A script to use with the TamperMonkey browser extension to force all pages in Microsoft Loop to be 100% max width.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      2025-02-14
// @description  A script to use with the TamperMonkey browser extension to force all pages in Microsoft Loop to be 100% max width.
// @author       You
// @match        https://loop.cloud.microsoft/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

function replacePixelsWithPercentage() {
  const searchRegex = /1024px/g;
  const replacementString = "100%";

  // Function to recursively process text nodes
  function processNode(node) {
    if (node.nodeType === Node.TEXT_NODE) {
      // Replace in text nodes
      node.nodeValue = node.nodeValue.replace(searchRegex, replacementString);
    } else if (node.nodeType === Node.ELEMENT_NODE) {
      // Don't process script or style tags
      if (node.tagName !== 'SCRIPT' && node.tagName !== 'STYLE') {
        // Recursively process child nodes
        for (let i = 0; i < node.childNodes.length; i++) {
          processNode(node.childNodes[i]);
        }
      }

      // Check inline styles
      if (node.hasAttribute('style')) {
        let style = node.getAttribute('style');
        let newStyle = style.replace(searchRegex, replacementString);
        if (newStyle !== style) {
          node.setAttribute('style', newStyle);
        }
      }
    }
  }

  // Find and Replace within <style> tags.
    const styleTags = document.querySelectorAll('style');
    styleTags.forEach(styleTag => {
        styleTag.textContent = styleTag.textContent.replace(searchRegex, replacementString)
    });


  // Start processing from the document body
  processNode(document.body);

  // --- MutationObserver (for dynamically loaded content) ---
  const observer = new MutationObserver(mutations => {
    mutations.forEach(mutation => {
      mutation.addedNodes.forEach(addedNode => {
        processNode(addedNode);
      });
      //Handle style attribute changes
      if (mutation.type === 'attributes' && mutation.attributeName === 'style') {
        let style = mutation.target.getAttribute('style');
        let newStyle = style.replace(searchRegex, replacementString);
          if(newStyle !== style){
              mutation.target.setAttribute('style', newStyle);
          }
      }
    });
  });

  // Start observing the document body for changes
  observer.observe(document.body, {
    childList: true, // Observe direct children
    subtree: true,   // Observe all descendants
    attributes: true,
    attributeFilter: ['style']
  });
}

// Run the replacement
replacePixelsWithPercentage();
})();