Any way to achieve indexOf/includes/contains in an expression in a Lightning Component?

Honestly it's a good feature to have in LC but at the moment we are limited to the function expression as mentioned in here. So only option we have is, to do includes/indexOf... stuffs in the controller/helper and set the appropriate attribute value.

For eg:

controller.js

({
    init : function(component, event, helper) {
        let word = component.get("v.word"), sequenceToCheck = 'abc';
        if (work.indexOf(sequenceToCheck) > -1) {
            console.log('sequence exist');
        } else {
            console.log('sequence does not exist');
        }

        if (work.includes(sequenceToCheck)) {
            console.log('sequence exist');
        } else {
            console.log('sequence does not exist');
        }

    }
})