仅匹配某些字符的正则表达式模式

Question

I'm a newbie to RegEx, and this particular issue is flummoxing me. This is for use with a JavaScript function.

I need to validate an input so that it matches only these criteria:

• Letters AZ (upper and lowercase)
• Numbers 0-9
• The following additional characters: space, period (.), comma (,), plus (+), and dash (-)

I can write a pattern easily enough for the first two criteria, but the third one is more difficult. This is the last pattern I managed, but it doesn't seem to work with the test string Farh%%$$+++,

Here's the pattern I'm trying

[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\\+\\.\\,\\s]*$ 

It's failing in that it's letting characters other than those specified in the text field when submitting the form.

Any help would be greatly appreciated.

Answer 1

我刚刚对此进行了测试，它似乎至少在我的第一轮测试中有效。

^[a-zA-Z 0-9\.\,\+\-]*$

Answer 2

The dash needs to be first in order not to be interpreted as a range separator. Also, make sure you anchor your regex with a ^ and $ at the beginning and end respectively so that your entire test string gets swallowed by your regex.

/^[-+., A-Za-z0-9]+$/

Answer 3

/^[a-z0-9 .,+-]+$/i

Answer 4

For validate selector as ID only (according to allowed characters https://www.w3.org/TR/html4/types.html#type-id ):

var isValidIdSelector = function (str) {
    var regex = new RegExp(/^[A-Za-z][A-Za-z0-9_\-\:\.]*$/gm);
    return regex.test(str);
};

Answer 5

ng-pattern="/^[a-zA-Z0-9/&quot&quot\\\]\[:;|=,+*?<>]+$/"

允许：字母数字 + " / \\ [ ] : ; | = , + * ? <>