I use crypto-js to encrypt data in javascript. The code is:

const ps = CryptoJS.AES.encrypt('789', 'qwertyuiopasdfghjklzxcvbnmQWERTY', {
    iv: 'qwertyuiopasdfgh',
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7
});
console.log(ps.toString());

That 789 is my string and qwertyuiopasdfghjklzxcvbnmQWERTY is secret key.
Output is:

U2FsdGVkX1/7qI5ivsfqwo1/2ta6br74JjchhUxOL9Y=

But in online crypto websites, result is not the same as mine. for example https://anycript.com/crypto or https://www.javainuse.com/aesgenerator have same result with 256 bits for key size:

rTCEJwv7cF51UeuIVOqgxA==

That is different from mine. I examined different values for padding parameters but the result is not as expected result yet. What is wrong with crypto-js?