get string after character javascript

const str = '01-01-2020';

// get everything after first dash
const slug = str.substring(str.indexOf('-') + 1); // 01-2020

// get everything after last dash 
const slug = str.split('-').pop(); // 2020var val = 'asdasd:111122:123123123';
var response = val.substring(val.indexOf(":"));

alert(response); // ":111122:123123123"