Multi tool use

Validate input with regular expression for universal alphabets in javascript

I have a form validator by AntonLapshin where I'm trying to validate a non-empty input field which can only take alphabets, space, - and '. The alphabets can be a-z, A-Z and europian letters æÆøØåÅöÖéÉèÈüÜ, etc. See this for more details.

Here is what I am doing:

method : function(input) {
return input.value !== ''
&& input.value === /^[a-zA-Z'- u00c0-u017e]+$/
}


Here, it should match: Åløæ-Bond Mc'Cool

Åløæ-Bond Mc'Cool

But fail: 123-Bond Mc'C@o!

123-Bond Mc'C@o!

When I run ^[a-zA-Z'- u00c0-u017e]+$ in regex tester, It works absolutely fine, but in my script, it is not validating and throws an invalid input error.

^[a-zA-Z'- u00c0-u017e]+$

What am I doing wrong?

3 Answers
3

I prefer to use RegExp. You also need to do return pattern.test(input)

RegExp

return pattern.test(input)

This will work :)

var test1 = "Åløæ-Bond Mc'Cool";
var test2 = "123-Bond Mc'C@o!";

var pattern = new RegExp(/^[a-zA-Z'- u00c0-u017e]+$/);

function regextest(input) {
return input !== '' && pattern.test(input)
}

console.log(regextest(test1))
console.log(regextest(test2))

RegExp

pattern.test

modify your function to test with regex

var pattern = /^[a-zA-Z'- u00c0-u017e]+$/

var method = function(input) {
return input !== '' &&
pattern.test(input)
}

//your sample strings
console.log(method("Åløæ-Bond Mc'Cool"))
console.log(method("123 - Bond Mc 'C@o!"))

I figured out a simpler solution for my question:

method : function(input) {
return input.value !== '' && /^[a-zA-Z'- u00c0-u017e]+$/.test(input.value)
}


The problem was, after the && operator, I was checking for the input value (that’s wrong in regex check) instead of Boolean value.

&&

This solution works perfectly and creates no confusion.

pattern.test

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