Chaining... about ionic-cache HOT 5 CLOSED

let key2 = 'some-promise2';
this.cache.getItem(key2).catch(() => {
    return someOtherPromiseFunction().then(result => {
       return this.cache.saveItem(key1, result).then(() => result); // because method saveItem do not return saved data, only resolve promise when is data successfully saved
    });
}).then((data) => {
    console.log("Saved data2: ", data);
});
...

let key1 = 'some-promise1';
let key2 = 'some-promise2';
this.cache.getItem(key1).catch(() => {
    return somePromiseFunction().then(result => {
        return this.cache.saveItem(key1, result).then(() => result);
    });
}).then((result1) => {
    console.log(result1)
    return this.cache.getItem(key2).catch(() => {
       return someOtherPromiseFunction().then(result => {
          return this.cache.saveItem(key2, result).then(() => result);
       });
    })
}).then((result2) => {
  console.log(result2)
});

let key1 = 'some-promise1';
let key2 = 'some-promise2';
this.cache.getItem(key1)
.catch(() => {
    return somePromiseFunction()
})
.then(result => {
    return this.cache.saveItem(key1, result).then(() => result);
})
.then((result1) => {
    console.log(result1)
    return this.cache.getItem(key2).catch(() => {
       return someOtherPromiseFunction()
    })
}).then((result2) => {
  console.log(result2)
  return this.cache.saveItem(key2, result2)
});