tab preview userchromejs in javascript

To achieve this, you would need to create a userChrome.js script that utilizes JavaScript to modify the browser's UI. One approach is to use the Tab Preview extension and modify its behavior using JavaScript.

Here's a sample code block that demonstrates how to customize the behavior of the Tab Preview extension to show the preview when hovering over a tab:


(function() {
  const TIMEOUT_DELAY = 500;
  const PREVIEW_TOOLTIP_ID = "tabpreview-tooltip";
  
  let timeoutId;
  
  function showPreview(event) {
    // Clear any previous timeout
    clearTimeout(timeoutId);
  
    // Remove any existing preview tooltip
    let tooltip = document.getElementById(PREVIEW_TOOLTIP_ID);
    if (tooltip) {
      tooltip.remove();
    }
  
    // Create and append the preview tooltip element
    tooltip = document.createElement("tabpreview-tooltip");
    tooltip.id = PREVIEW_TOOLTIP_ID;
  
    let tab = event.target;
    if (tab.nodeName != "TAB" || !tab.hasAttribute("sizemode")) {
      return;
    }
  
    tooltip.classList.add("tabpreview-preview");
    tooltip.style.top = (window.pageYOffset + '-10') + 'px';
    tooltip.style.left = (tab.boxObject.screenX + 'px');
    tooltip.style.width = tab.boxObject.width + 'px';
    tooltip.style.height = tab.boxObject.height + 'px';
  
    document.body.appendChild(tooltip);
  }
  
  function hidePreview() {
    // Clear any previous timeout
    clearTimeout(timeoutId);
  
    // Remove any existing preview tooltip
    let tooltip = document.getElementById(PREVIEW_TOOLTIP_ID);
    if (!tooltip) {
      return;
    }
  
    tooltip.remove();
  }
  
  function delayedShowPreview(event) {
    // Schedule showing preview tooltip
    timeoutId = setTimeout(function() {
      showPreview(event);
    }, TIMEOUT_DELAY);
  }
  
  // Stop showing preview tooltip immediately
  function stopDelayedShowPreview() {
    clearTimeout(timeoutId);
  }
  
  // Add event listeners to tabs
  let tabs = document.querySelectorAll("tab");
  for (let i = 0; i < tabs.length; i++) {
    let tab = tabs[i];
    tab.addEventListener("mouseover", delayedShowPreview, false);
    tab.addEventListener("mouseout", stopDelayedShowPreview, false);
  }
})();
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