验证HTML编号输入

Question

如何验证必须包含1.00或更大的字段？ 还必须包含2个小数点。

我发现了这个...

    <input pattern="\d?\d\.\d\d" maxlength=5 size=5 onchange="check(this)">
    <script>
    function check(elem) {
      if(!elem.value.match(/^\d?\d\.\d\d$/)) {
        alert('Error in data – use the format dd.dd (d = digit)');
      }
    }
    </script>

但它不允许超过99.99。

抱歉，我需要添加更多详细信息以对此进行说明。

我需要接受1.00或10.00甚至1000.00

只是不

1或10或2.0或20.0

必须是整数和2个小数位

任何帮助深表感谢！

Answer 1

/^[1-9]+\\d*\\.\\d{2}$/g应该在

^[1-9] : makes sure the non-decimal part is greater than 0.
\d*    : allows trailing zeroes as in 1000

 const regex = /^[1-9]+\\d*\\.\\d{2}$/g; const str = `1601.91`; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }