JavaScript_正则表达式验证实数（正负整数小数）

<script>
   // ±0-9整数|±多位整数|±小数
   var reg = /^-?\d$|^-?[1-9]\d+$|^-?\d+\.\d+$/;
   console.log(reg.test("001"));
   console.log(reg.test("1"));
   console.log(reg.test("11"));
   console.log(reg.test("-1"));
   console.log(reg.test("10000"));
   console.log(reg.test("1.0353"));
   console.log(reg.test("240.14"));
   console.log(reg.test("-0.1"));
   console.log(reg.test("1."));
   console.log(reg.test(".1"));
   console.log(reg.test("1.."));
script>