<!DOCTYPE html> <html> <body> <h1>JavaScript 函数</h1> <h2>箭头函数</h2> <p>这个例子展示了箭头函数的语法,以及如何使用它。</p> <p id="demo"></p> <script> let myFunction = (a, b) => a * b; document.getElementById("demo").innerHTML = myFunction(4, 5); </script> </body> </html>