How do I check if a string is entirely made of the same substring?

How do I check if a string is entirely made of the same substring?

I have to create a function which takes a string, and it should return true or false based on whether the input consists of a repeated character sequence.

The length of the given string is always greater than 1 and the character sequence must have at least one repetition.

"aa" // true(entirely contains two strings "a")
"aaa" //true(entirely contains three string "a")
"abcabcabc" //true(entirely containas three strings "abc")

"aba" //false(At least there should be two same substrings and nothing more) "ababa" //false("ab" exists twice but "a" is extra so false)

I have created the below function:

function check(str){
  if(!(str.length && str.length - 1)) return false;
  let temp = '';
  for(let i = 0;i<=str.length/2;i++){
    temp += str[i]
    //console.log(str.replace(new RegExp(temp,"g"),''))
    if(!str.replace(new RegExp(temp,"g"),'')) return true;
  return false;

console.log(check('aa')) //true console.log(check('aaa')) //true console.log(check('abcabcabc')) //true console.log(check('aba')) //false console.log(check('ababa')) //false

Checking of this is part of the real problem. I can't afford a non-efficient solution like this. First of all, it's looping through half of the string.

The second problem is that it is using replace() in each loop which makes it slow. Is there a better solution regarding performance?

javascript string algorithm

What's new in Bootstrap 5 and when Bootstrap 5 release date?

How to Build Progressive Web Apps (PWA) using Angular 9

What is new features in Javascript ES2020 ECMAScript 2020

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Random Password Generator Online

HTML Color Picker online | HEX Color Picker | RGB Color Picker

Convert String To Array Using Javascript Split Method

In this tutorial, you’ll be going to learn how to convert string to array using javascript split method. The easiest approach to use javascript built-in method String.split(). JavaScript split string method return array of a substring after splitting a string based on the separator you provide. The separator might be a string, special character or […]

Algorithms with JavaScript

A Day with JavaScript Algorithms.

The essential JavaScript concepts that you should understand

The essential JavaScript concepts that you should understand - For successful developing and to pass a work interview

How to Reverse a String in JavaScript

In this tutorial, you'll be going to learn how to reverse a string in javascript. The simple way to reverse a string is string.split('').reverse().join('')

quicksort Algorithmic in JavaScript

quicksort Algorithmic in JavaScript explain in js