Javascript regexp (match after ":" symbol)

Question

How to get all text following the symbol ":"?

I have tried:

'prop:bool*'.match(/:(.[a-z0-9]+)/ig)

But it returns [":bool"] not ["bool"].

Update:

I need to use this inside the following expression:

'prop:bool*'.match(/^[a-z0-9]+|:.[a-z0-9]+|\*/ig);

So that the result becomes:

["prop", "bool", "*"]

Answer 1

You could solve this by performing a positive lookbehind action.

'prop:bool*'.match(/^[a-z0-9]+|(?<=:).[a-z0-9]+|\*/ig)

The positive lookbehind is the (?<=:) part of the regex and will here state a rule of must follow ':'.

The result should here be ["prop", "bool", "*"].

Edit:

Original requirements were somewhat modified by original poster to return three groups of answers. My original code, returning one answer, was the following: 'prop:bool*'.match(/(?<=:).[a-z0-9]+/ig)

Answer 2

这不是纯正则表达式解决方案，因为它利用了String对象及其substring（）方法的优势，如下所示：

/// <reference types="@types/googlemaps" />

匹配成功后，一个元素组成的数组将保留值var str = 'prop:bool*'; var match = str.match(/:(.[a-z0-9]+)/ig).pop().substring(1,str.length); console.log(match);。该结果仅需要提取:bool部分。因此，该元素使用其pop（）方法返回字符串值。字符串依次使用其substring（）方法绕过'：'并提取所需的部分，即bool。

bool

要返回三组数据，代码使用捕获组并通过使用var [a,b,c] = 'prop:bool*'.match(/^([a-z0-9]+)|:(.[a-z0-9]+)|(\*)/ig); console.log(a,b.substring(1,b.length),c);的substring（）方法来修剪冒号。

Answer 3

You could simply do:

'prop:bool*'.match(/:(.[a-z0-9]+)/)[1]

Answer 4

If your entire string is of the form you show, you could just use a regex with capture groups to get each piece:

console.log('prop:bool*'.match(/^([a-z0-9]+):(.[a-z0-9]+)(\*)/i).slice(1));