<html><body><p>单击按钮检查数组中的每个元素是否都具有 18 或更大的值。</p><button onclick="myFunction()">试一试</button><p id="demo"></p><script>var ages = [32, 33, 16, 40];function checkAdult(age) { return age >= 18;}function myFunction() { document.getElementById("demo").innerHTML = ages.every(checkAdult);}</script></body></html>