var.replace is not a function

Question

I\'m using the below code to try to trim the string in Javascript but am getting the error mentioned in the title:

function trim(str) {
    return str.replac         


        

Answer 1

You should probably do some validations before you actually execute your function :

function trim(str) {
    if(typeof str !== 'string') {
        throw new Error('only string parameter supported!');
    }

    return str.replace(/^\s+|\s+$/g,'');
}