php - 如何将此 PHP 正则表达式转换为 Javascript？

Question

我试着转换这个：

$regex = "/^[0-9]+[0-9\.]*(?<!\.)$/"

所有这些，但没有一个是正确的：

var regex = /^(?!\.$)[0-9]+[0-9\.]*/;
var regex = /^(?!.*\.$)[0-9]+[0-9\.]*/;
var regex = /^[0-9]+[0-9\.]*(?!\.$)/;

PHP 正则表达式正确拒绝1.1aand 1.，但 javascript 正则表达式没有。

Answer 1

Your PHP Regex may be better written as the following, which matches the same language, but is easier to read and doesn't need to use a negative look-behind:

$regex = "/^\d+(\.\d+)*$/"

It is also easy to translate it directly to a Javascript regex:

var regex = /^\d+(\.\d+)*$/;