javascript - 不是以正则表达式结尾的特定单词

Question

我有这些字符串：

"/page/test/myimg.jpg"
"/page/test/"
"/page2/test/"
"/page/test/other"

我希望所有以 /page/test 开头的字符串都为 true ，除非它以.jpg.

然后我做了：/^\/page\/test(.*)(?!jpg)$/。好吧，它不工作。:\

它应该像这样返回：

"/page/test/myimg.jpg" // false
"/page/test/" // true
"/page2/test/" // false
"/page/test/other" // true

Answer 1

使用 JavaScript 轻松完成：

/^(?!.*\.jpg$)\/page\/test/

Answer 2

Use a negative look behind anchored to end:

/^\/page\/test(.*)(?<!\.jpg)$/

---

For clarity, this regex will match any input that *doesnt end in .jpg:

^.*(?<!\.jpg)$

Edit (now must work in JavaScript too)

JavaScript doesn't support look behinds, so this ugly option must be used, which says that at least one of the last 4 characters must be other than .jpg:

^.*([^.]...|.[^j]..|..[^p].|...[^g])$