Example of a custom event

handleCodeChange(event) {
        let codeLength = event.target.value.length;
        
        if(codeLength === 6) {
            const selectedEvent = new CustomEvent("showvalidatebutton", {
                detail: {
                    codeReceivedFromCustomer: event.target.value,
                    codeSentToCustomer: this.completeCode.toString()
                }
            });
            this.dispatchEvent(selectedEvent);
        } else {
            this.dispatchEvent(new CustomEvent('hidevalidatebutton'));
        }
    }