Delete first character of a string in Javascript

Question

I want to delete the first character of a string, if the first character is a 0. The 0 can be there more than once.

Is there a simple function that checks the first

Answer 1

String.prototype.trimStartWhile = function(predicate) {
    if (typeof predicate !== "function") {
    	return this;
    }
    let len = this.length;
    if (len === 0) {
        return this;
    }
    let s = this, i = 0;
    while (i < len && predicate(s[i])) {
    	i++;
    }
    return s.substr(i)
}

let str = "0000000000ABC",
    r = str.trimStartWhile(c => c === '0');
    
console.log(r);