javascript 正则分组捕捉

1 使用match 不能加/g 否则无效

2 使用matchAll  需要先定义一个RegExp对象

const regexp = RegExp(/,"(.+)")/,'g');
const matches = str.matchAll(regexp);
for (const match of matches) {
  console.log(`Found ${match[0]} start=${match.index} end=${match.index + match[0].length}.`);
  console.log(match[1]);
}

可以使用exec

const regexp = RegExp('foo[a-z]*','g');
const str = 'table football, foosball';
let match;

while ((match = regexp.exec(str)) !== null) {
  console.log(`Found ${match[0]} start=${match.index} end=${regexp.lastIndex}.`);
  // expected output: "Found football start=6 end=14."
  // expected output: "Found foosball start=16 end=24."
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/matchAll