How can I check if a string contains only numbers, comma and periods with regex in javascript?

javascript, regex

Solution

Your regexp expects one character from the first class (0-9), then one from the second class (comma) then one from the last class (dot). Instead you want any number of characters (*) from the class containing digits, commas and dots (`[0-9,.]`). Also, you don't need the parenthesis:

var isValid = /^[0-9,.]*$/.test(str);

DEMO (and explanation): http://regex101.com/r/yK6oF4

Problem

I have an input field that I will only accept numbers, commas and periods. How can I test if the string is valid according to these rules? I have tried the following: ``` var isValid = /([0-9][,][.])$/.test(str); ``` but it's not working. isValid variable is always false.

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