我正在尝试使用JavaScript控制器中的正则表达式验证字符串？

Question

I am trying to validate a string with regex. that the string should contain only the listed words and characters.

(ie) the string can accept and, or, not, numbers, (,) and blankspace.

I tried with a regular expression but its not working as expected.

/(\d|and|or|not|\(|\)|\s)*/

when i am using this in salesforce lightning component controller.js its is not providing the expexted result.

input : 1 and ( 2 or 3 )
expected output : true

input : 1 aaa ( 2 or 3 )
expected output : false

thanks in advance.

Answer 1

The problem is that you've define that you need any number of these and you don't care about the position. So the string 1 aaa ( 2 or 3 ) matches 1 , as well as (space), ( , 2 , and , 3 , ) therefore it satisfies the regex. The fact that there is aaa which doesn't match is ignored when there are other things that do match.

However, if you use the start and end anchors ^ and $ , that defines that your entire input must conform to this pattern as opposed to any sub-portion of it, which is exactly what you want:

 const regex = /^(\\d|and|or|not|\\(|\\)|\\s)*$/; console.log(regex.test("1 and ( 2 or 3 )")); // true console.log(regex.test("1 aaa ( 2 or 3 )")); // false