如何将字符串限制为不允许数字或特殊字符？

Question

I have textbox called goalName. In goalName I want to disallow special characters and numbers. I am currently trying the following:

 var goalNameValidation = /^[_\W\s]*$/;
 if (goalName == "" || goalNameValidation.test(goalName) == true) {
     //Give Error 
     error = true;
 }

This only limits special characters, and not numbers. How would I go about restricting both?

I can use jQuery for this solution if that is helpful, however vanilla JavaScript would suffice.

Answer 1

It is probably easier (and more intuitive) to write a regex that matches what you WANT to allow.

var goalNameValidation = /^[A-Za-z]+$/;
if (goalName == "" || goalNameValidation.test(goalName) == false) {
    //Give Error 
    error = true;
}

This way, you can look at it, and see more easily what characters are allowed/not allowed.

Answer 2

将正则表达式更改为：

var goalNameValidation = /^[^a-z]*$/i;