javascript - 正则表达式附加到单词之一

Question

鉴于：

Ya its a great day.

查找（在 1 个正则表达式语句中同时执行）

Ya => Ya + cat
great => great + cat

我怎么能做这样的事情？

"Ya its a great day".replace(/found=(Ya|great)/g, found + " cat");

输出：

Ya cat its a great cat day.

Answer 1

"Ya its a great day".replace(/(Ya|great)/g,  "$1 cat");

输出：

Ya cat its a great cat day     

现场演示

@Pointy的文档

Answer 2

您可以使用引用来引用找到的匹配：$1 $2 等等

"Ya its a great day".replace(/(Ya|great)/g, "$1 cat");