What is the difference between \s and \t?

Question

他们似乎都工作但我被告知你应该在形成一个RegExp时使用它们？

Answer 1

\\s matches any whitespace character, including tabs. \\t only matches a tab character.

\\t being a subset of \\s , you should not have to use both at the same time.

Answer 2

\\s matches a single whitespace character, which includes spaces, tabs, form feeds, line feeds and other unicode spaces.

\\t Matches a single tab.

If you are using \\s , you don't need to include \\t .

More information on regex patterns here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

Answer 3

\\t is a literal tab whereas \\s is a predefined character class . \\s matches any whitespace character while \\t matches only tabs (which are also matched by \\s ).

This is similar to asking what the difference between \\d and 0 is. 0 is a literal 0 whereas \\d is any digit.

Answer 4

\\s contains all whitespace characters. For example, in Java, \\s is [\\t\\n\\x0b\\r\\f] . \\t is just a single tab, so you don't need to use both.