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<!DOCTYPE html> <html> <body> <p>单击该按钮可使数组中的每个元素都具有大于特定数字的值。</p> <p>最低年龄：<input type="number" id="ageToCheck" value="18"></p> <button onclick="myFunction()">试一试</button> <p>最低年龄以上的所有年龄段：<span id="demo"></span></p> <script> var ages = [32, 33, 12, 40]; function checkAdult(age) { return age >= document.getElementById("ageToCheck").value; } function myFunction() { document.getElementById("demo").innerHTML = ages.filter(checkAdult); } </script> </body> </html>