attributeChangedCallback(name, oldVal, newVal) {
        if (oldVal !== newVal) {
            switch(name) {
            }
        }
    }
// To do when a attribute changed
To do when a attribute changed
To do when a attribute changed
attributeChangedCallback(name, oldVal, newVal) {
        if (oldVal !== newVal) {
            switch(name) {
            }
        }
    }
attributeChangedCallback ( name , oldVal , newVal ) { if ( oldVal !== newVal ) { switch ( name ) { } } }
To do when a attribute changed
To do when a attribute changed