admin管理员组

文章数量:1296914

I'm writing a file upload page script (Javascript). The user selects a file from their machine.

I need to strip out anything from the string containing the file name that is not:

  • A letter
  • A number
  • a dash
  • an underscore
  • A period

I have been trying to use the Javascript replace function to remove the unnecessary characters. I am able to remove all the non-alphanumeric parts using:

rawFilename = data.files[0].name;  
safeFilename = rawFilename.replace(/\W/g, '');

That leaves in the letter, numbers, and underscore, but I need to also allow dash and periods. I'm not sure what the correct regex to select the dash and periods as well would be.

I'm writing a file upload page script (Javascript). The user selects a file from their machine.

I need to strip out anything from the string containing the file name that is not:

  • A letter
  • A number
  • a dash
  • an underscore
  • A period

I have been trying to use the Javascript replace function to remove the unnecessary characters. I am able to remove all the non-alphanumeric parts using:

rawFilename = data.files[0].name;  
safeFilename = rawFilename.replace(/\W/g, '');

That leaves in the letter, numbers, and underscore, but I need to also allow dash and periods. I'm not sure what the correct regex to select the dash and periods as well would be.

  • javascript
  • regex
Share Improve this question asked Nov 25, 2014 at 0:40 Bill DaileyBill Dailey 431 silver badge4 bronze badges
Add a ment  | 

2 Answers 2

Reset to default 9

This is pretty simple using a negative character class:

str = str.replace(/[^\w.-]+/g, "");

The only gotcha is that the - needs to be either first or last in the list, because it can be interpreted as the range operator.

Adding to the previous answer by Lucas

str = str.replace(/[^\w\.\-]/g, "");

Dashes and periods can be any location.

本文标签：

版权声明：本文标题：regex - Allow only alphanumeric, dash, underscore, and period in string (Javascript) - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1741612043a2388316.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。