Using jQuery to select all <div> elements on a page.js

// Load jQuery, equivalent to having the <script> tag on the page
// <script src="https://code.jquery.com/jquery-3.5.0.js"></script>
const loadScript = async (url) => {
  const response = await fetch(url)
  const script = await response.text()
  eval(script) // or Function(script)
}

const scriptUrl = "https://code.jquery.com/jquery-3.5.0.js"
loadScript(scriptUrl)

// In the browser console, you need to enter and run the above commands to load
// jQuery first, separately, before you can actually use it in the console:

// Select all <div> elements on the page
const jQueryDivs = $("div")
// Apply CSS styles to the selected <div> elements
jQueryDivs.css("border", "3px solid orange")
// As a one-liner:
$("div").css("border", "3px solid orange")