CODEWITHSUNDEEP
javascriptregex
Art F
Art F

Reputation: 4202

Javascript Regexp validation not quite working

I am trying to use RegExp validation for a number that can have up to 5 numbers followed up one option decimal place. Like 48293 or 23.4 are good. 99.99 or 453543 are not. I wrote the following function: 

function validateLoad(load_value) {
 var matchValue = new RegExp('[0-9]{1,5}(\.[0-9]{1})?')
 return matchValue.test(load_value)
}

However, this seems to return true for all numerical values, can anyone tell me how to fix this?

Upvotes: 1

Views: 52

Answers (2)

user1636522
user1636522

Reputation:

Using literal notation would avoid to escape backslashes :

function validateLoad(load_value) {
    return /^\d{1,5}(\.\d)?$/.test(load_value)
}

Upvotes: 0

Tim Pietzcker
Tim Pietzcker

Reputation: 336478

You need to use anchors to make sure the entire string (and not just a substring) is matched by the regex. Also, don't forget to double the backslashes if you construct the regex from a string (and drop the {1}, it's a no-op):

var matchValue = new RegExp('^[0-9]{1,5}(\\.[0-9])?$');

Upvotes: 3

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