anniesullie

/**
 * A bookmarklet for viewing shifted elements while debugging
 * Cumulative Layout Shift (web.dev/cls). Works in Chrome 84+
 * Shows the previous position of shifted elements in yellow,
 * and the new position in red.
 *
 * To install:
 * 1. Copy the code starting from the line beginning `javascript:`
 * 2. Add a new bookmark in Chrome, and paste the code in as the URL.
 **/