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<!DOCTYPE html> <html> <body> <h1>Math.clz32()</h1> <p>单击该按钮可返回不同数字的 32 位二进制表示中前导零的数量：</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { // 00000000000000000000000000000000 = 32 leading zeros var a = Math.clz32(0); // 00000000000000000000000000000001 = 31 leading zeros var b = Math.clz32(1); // 00000000000000000000000000000010 = 30 leading zeros var c = Math.clz32(2); // 00000000000000000000000000000100 = 29 leading zeros var d= Math.clz32(4); var x = a + "<br>" + b + "<br>" + c + "<br>" + d; document.getElementById("demo").innerHTML = x; } </script> </body> </html>