javascript substring after character

                                    var string = "abcd";
console.log(string.substring(3)); //"d"

                                    const str = 'sometext-20202';
const slug = str.split('-').pop();

                                    var testStr = "sometext-20202"
var splitStr = testStr.substring(testStr.indexOf('-') + 1);

                                    // function you can use:
function getSecondPart(str) {
    return str.split('-')[1];
}
// use the function:
alert(getSecondPart("sometext-20202"));

                                    var val = 'asdasd:111122:123123123';
var response = val.substring(val.indexOf(":"));

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