setStorage、getStorage、 removeStorage 封装

// Local storage 
    setStorage (name, data) {
        let dataType = typeof data;
        // json对象
        if(dataType === 'object'){
            window.localStorage.setItem(name, JSON.stringify(data));
        }
        // foundation type 
        the else  IF ([ 'Number', 'String', 'Boolean']. The indexOf (dataType)> = 0 ) {
            window.localStorage.setItem(name, data);
        }
        // Other types are not supported by 
        the else {
            Alert ( 'local storage of this type can not be used' );
        }
    }
    // remove the local store 
    getStorage (name) {
        let data = window.localStorage.getItem(name);
        if(data){
            return JSON.parse(data);
        }
        else{
            return '';
        }
    }
    // delete locally stored 
    removeStorage (name) {
        window.localStorage.removeItem(name);
    }