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<     let deleting = Promise.resolve();
< 
<     if (deleteFirst) {
<       deleting = Promise.all(requests.map((request) => {
<         return cache.delete(request).catch(() => {});
<       }));
<     }
< 
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<         .then(fixRedirectedResponse).then((response) => {
---
>         .then(fixRedirectedResponse)
>         .then((response) => {
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<         }, () => ({ error: true }));
<     })).then((responses) => {
<       if (failAll && responses.some(data => data.error)) {
<         return Promise.reject(new Error('Wrong response status'));
<       }
---
>         }, () => ({ error: true }))
>         .then(data => {
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<       if (!failAll) {
<         responses = responses.filter((data, i) => {
<           if (!data.error) { return true; }
---
>           if (failAll && data.error) {
>             return Promise.reject(new Error('Wrong response status'));
>           }
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<           requests.splice(i, 1);
<           return false;
<         });
<       }
---
>           const deleting = deleteFirst
>             ? cache.delete(request).catch(() => {})
>             : Promise.resolve();
> 
>           return deleting.then(() => {
>             if (!data.error) {
>               return cache.put(request, data.response)
>             }
>           });
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<       return deleting.then(() => {
<         let addAll = responses.map(({ response }, i) => {
<           return cache.put(requests[i], response);
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< 
<         return Promise.all(addAll);
<       });
<     });
---
>     }));