正则表达式中/gi 的含义是什么？

我在 JavaScript 代码中看到这样一行:

var regex = /[^\w\s]/gi;

正则表达式中的 /gi是什么意思？

其他部分我可以理解，因为它接受一组单词和空格，但不接受 /gi。

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The beginning and ending / are called delimiters. They tell the interpreter where the regex begins and ends. Anything after the closing delimiter is called a "modifier," in this case g and i.

The g and i modifiers have these meanings:

  • g = global, match all instances of the pattern in a string, not just one
  • i = case-insensitive (so, for example, /a/i will match the string "a" or "A".

In the context you gave (/[^\w\s]/gi), the i is meaningless, because there are no case-specific portions of the regex.

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最佳答案 
g modifier: global. All matches (don't return on first match)


i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])

In your case though i is immaterial as you dont capture [a-zA-Z].

For input like !@#$ if g modifier is not there regex will return first match !See here.

If g is there it will return the whole or whatever it can match.See here


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