const regex = /^([1-9]\d*|0)\.(\d*[1-9]+)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^([1-9]\\d*|0)\\.(\\d*[1-9]+)$', 'gm')
const str = `小数点左侧条件1：[1-9]开头的数字后面可以是任何数量的数字
小数点左侧条件2：只有一个0
小数点右侧条件1：任意数量的数字，并且结尾必须是[1-9]
1
1.
1.0
1.10
01.1
01.01
01.10
2.1
2.20
2.01
2.020
3.105
3.01205
2.005
0.02`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
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}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions