试试这个。

function RemoveMask(value) {
  value = value.replace(/\./g, "");
  return /\d+,\d+/.exec(value)[0].toString();
}

console.log(RemoveMask("R$5.000,00"));
console.log(RemoveMask("R$5.000,02"));
console.log(RemoveMask("Lorem Ipsum R$5.000,05 test"));
console.log(RemoveMask("Lorem Ipsum R$5.000,00 test"));
console.log(RemoveMask("Lorem Ipsum R$500,00 test"));
console.log(RemoveMask("Lorem Ipsum R$0,05 test"));
console.log(RemoveMask("Lorem Ipsum R$0,50 test"));

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slice关闭货币符号，然后replace其他：

const str = "R$5.000,00";
const res = str.slice(2).replace(/\./g, "").replace(/,/g, ".");

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尝试一个支持多种货币的npm库，所以你不需要担心正则表达式：

import currencyToFloat from 'currency-to-float';

const price = 'R$ 1,99';

const parsed = currencyToFloat(price);

console.log(parsed); // 1.99

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