javascript 如何验证字符串包含某些字符？

Question

提问by Moon

I'm trying to check if a string contains certain characters. I was going to use regex, but my string may not have a format.

我正在尝试检查字符串是否包含某些字符。我打算使用正则表达式，但我的字符串可能没有格式。

I would like to ensure that i'm allowing only the following characters

我想确保我只允许以下字符

1. + symbol
2. - symbol
3. numbers 0~9
4. (
5. )
6. . (dot)
7. spaces

Answer 1

if ( string.match('[^(). +\-0-9]') ) {
    alert("Invalid string");
}

Answer 2

This regex will match a string containing only those characters:

此正则表达式将匹配仅包含这些字符的字符串：

^[+\-0-9(). ]+$

Answer 3

Try this:

试试这个：

  var isValid = /^[\x2B\x2D\x28\x29\x2E\s\d]+$/.test(input); 
  if(isValid ) {
      //...

  } else { 
    //..invalid
  }