Checking for jQuery when jQuery has been loaded.js

// Enter these commands into the console to load jQuery first.
// <script src="https://code.jquery.com/jquery-3.5.0.js"></script>
const scriptSource = "https://code.jquery.com/jquery-3.5.0.js"
document.write(`<script src="${scriptSource}" type="text/javascript"></script>`)

// Then, enter the following commands separately:
console.log($) // function jQuery(selector, context)
console.log(typeof $) // "function"

console.log($()) // Object {  }
console.log(typeof $()) // "object"

try {
  console.log($().jquery) // "3.5.0"
  console.log(typeof $().jquery) // "string"
} catch (e) {
  console.log(e)
}

// Equivalent to:
try {
  console.log(jQuery) // function jQuery(selector, context)
  console.log(typeof jQuery) // "function"

  console.log(jQuery()) // Object
  console.log(typeof jQuery()) // "object"

  console.log(jQuery().jquery) // "3.5.0"
  console.log(typeof jQuery().jquery) // "string"
} catch (e) {
  console.log(e)
}