swr - npm Package Compare versions

Comparing version 0.1.17 to 0.1.18

dist/index.js

@@ -1,1 +0,1 @@
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0){a=[]}var o="_swr_page_count_"+e;var l="_swr_page_offset_"+e;var c=u.useState(i.cacheGet(o)||1),s=c[0],d=c[1];var v=u.useState(i.cacheGet(l)||[null]),p=v[0],R=v[1];var h=u.useState([]),S=h[0],_=h[1];var O=u.useRef(r);var E=u.useRef(false);var C=u.useCallback(function(e){var r=O.current(e);if(r&&!r.length){E.current=true}else{E.current=false}return r},[]);var y=p[s]===null;var T=s===p.length;var b=y&&s===1&&E.current;var w=u.useCallback(function(){if(T||y)return;d(function(e){i.cacheSet(o,e+1);return e+1})},[T||y]);var g=u.useCallback(r,a);O.current=g;var I=u.useMemo(function(){var r=function(e){return function(r){if(!S[e]||S[e].data!==r.data||S[e].error!==r.error||S[e].revalidate!==r.revalidate){_(function(t){var a=n(t);a[e]={data:r.data,error:r.error,revalidate:r.revalidate,isValidating:r.isValidating,mutate:r.mutate};return a});if(typeof r.data!=="undefined"){var a=t(r,e);if(p[e+1]!==a){R(function(r){var t=n(r);t[e+1]=a;i.cacheSet(l,t);return t})}}}return r}};var 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dist/types.d.ts

 export declare type fetcherFn<Data> = (...args: any) => Data | Promise<Data>;
 export interface ConfigInterface<Data = any, Error = any, Fn extends fetcherFn<Data> = fetcherFn<Data>> {
     errorRetryInterval?: number;
+    errorRetryCount?: number;
     loadingTimeout?: number;
@@ -30,3 +31,4 @@ focusThrottleInterval?: number;
 export declare type triggerInterface = (key: keyInterface, shouldRevalidate?: boolean) => void;
-export declare type mutateInterface<Data = any> = (key: keyInterface, data: Data | Promise<Data>, shouldRevalidate?: boolean) => void;
+declare type mutateCallback<Data = any> = (currentValue: Data) => Data;
+export declare type mutateInterface<Data = any> = (key: keyInterface, data?: Data | Promise<Data> | mutateCallback<Data>, shouldRevalidate?: boolean) => Promise<Data | undefined>;
 export declare type broadcastStateInterface<Data = any, Error = any> = (key: string, data: Data, error?: Error) => void;
@@ -37,2 +39,3 @@ export declare type responseInterface<Data, Error> = {
     revalidate: () => Promise<boolean>;
+    mutate: (data?: Data | Promise<Data> | mutateCallback<Data>, shouldRevalidate?: boolean) => Promise<Data | undefined>;
     isValidating: boolean;
@@ -39,0 +42,0 @@ };

esm/config.js

@@ -28,2 +28,5 @@ import deepEqual from 'fast-deep-equal';
     }
+    if (config.errorRetryCount && opts.retryCount > config.errorRetryCount) {
+        return;
+    }
     // exponential backoff
@@ -30,0 +33,0 @@ const count = Math.min(opts.retryCount || 0, 8);

esm/types.d.ts

 export declare type fetcherFn<Data> = (...args: any) => Data | Promise<Data>;
 export interface ConfigInterface<Data = any, Error = any, Fn extends fetcherFn<Data> = fetcherFn<Data>> {
     errorRetryInterval?: number;
+    errorRetryCount?: number;
     loadingTimeout?: number;
@@ -30,3 +31,4 @@ focusThrottleInterval?: number;
 export declare type triggerInterface = (key: keyInterface, shouldRevalidate?: boolean) => void;
-export declare type mutateInterface<Data = any> = (key: keyInterface, data: Data | Promise<Data>, shouldRevalidate?: boolean) => void;
+declare type mutateCallback<Data = any> = (currentValue: Data) => Data;
+export declare type mutateInterface<Data = any> = (key: keyInterface, data?: Data | Promise<Data> | mutateCallback<Data>, shouldRevalidate?: boolean) => Promise<Data | undefined>;
 export declare type broadcastStateInterface<Data = any, Error = any> = (key: string, data: Data, error?: Error) => void;
@@ -37,2 +39,3 @@ export declare type responseInterface<Data, Error> = {
     revalidate: () => Promise<boolean>;
+    mutate: (data?: Data | Promise<Data> | mutateCallback<Data>, shouldRevalidate?: boolean) => Promise<Data | undefined>;
     isValidating: boolean;
@@ -39,0 +42,0 @@ };

esm/use-swr-pages.js

@@ -132,3 +132,4 @@ import React, { useCallback, useMemo, useState, useRef } from 'react';
                         revalidate: swr.revalidate,
-                        isValidating: swr.isValidating
+                        isValidating: swr.isValidating,
+                        mutate: swr.mutate
                     };
@@ -135,0 +136,0 @@ return _swrs;

esm/use-swr.js

@@ -37,2 +37,3 @@ import { useCallback, useContext, useEffect, useLayoutEffect, useState, useRef, useMemo } from 'react';
 };
+const NO_DEDUPE = false;
 const trigger = (_key, shouldRevalidate = true) => {
@@ -47,3 +48,3 @@ const [key] = getKeyArgs(_key);
         for (let i = 0; i < updaters.length; ++i) {
-            updaters[i](shouldRevalidate, currentData, currentError, true);
+            updaters[i](shouldRevalidate, currentData, currentError, NO_DEDUPE);
         }
@@ -60,10 +61,22 @@ }
 };
-const mutate = async (_key, _data, shouldRevalidate) => {
+const mutate = async (_key, _data, shouldRevalidate = true) => {
     const [key] = getKeyArgs(_key);
     if (!key)
         return;
+    // if there is no new data, call revalidate against the key
+    if (typeof _data === 'undefined')
+        return trigger(_key, shouldRevalidate);
     // update timestamp
     MUTATION_TS[key] = Date.now() - 1;
     let data, error;
-    if (_data && typeof _data.then === 'function') {
+    if (_data && typeof _data === 'function') {
+        // `_data` is a function, call it passing current cache value
+        try {
+            data = await _data(cacheGet(key));
+        }
+        catch (err) {
+            error = err;
+        }
+    }
+    else if (_data && typeof _data.then === 'function') {
         // `_data` is a promise
@@ -79,7 +92,2 @@ try {
         data = _data;
-        if (typeof shouldRevalidate === 'undefined') {
-            // if it's a sync mutation, we trigger the revalidation by default
-            // because in most cases it's a local mutation
-            shouldRevalidate = true;
-        }
     }
@@ -94,5 +102,9 @@ if (typeof data !== 'undefined') {
         for (let i = 0; i < updaters.length; ++i) {
-            updaters[i](!!shouldRevalidate, data, error, true);
+            updaters[i](!!shouldRevalidate, data, error, NO_DEDUPE);
         }
     }
+    // throw error or return data to be used by caller of mutate
+    if (error)
+        throw error;
+    return data;
 };
@@ -158,2 +170,5 @@ function useSWR(...args) {
     const keyRef = useRef(key);
+    const boundMutate = useCallback((data, shouldRevalidate) => {
+        return mutate(key, data, shouldRevalidate);
+    }, [key]);
     // start a revalidation
@@ -461,2 +476,3 @@ const revalidate = useCallback(async (revalidateOpts = {}) => {
             revalidate,
+            mutate: boundMutate,
             isValidating: stateRef.current.isValidating
@@ -468,3 +484,3 @@ };
     return useMemo(() => {
-        const state = { revalidate };
+        const state = { revalidate, mutate: boundMutate };
         Object.defineProperties(state, {
@@ -471,0 +487,0 @@ error: {

package.json

 {
   "name": "swr",
-  "version": "0.1.17",
+  "version": "0.1.18",
   "description": "React Hooks library for remote data fetching",
@@ -5,0 +5,0 @@ "main": "./dist/index.js",

README.md

@@ -93,3 +93,3 @@ [![SWR](https://assets.zeit.co/image/upload/v1572289618/swr/banner.png)](https://swr.now.sh)
 ```js
-const { data, error, isValidating, revalidate } = useSWR(key, fetcher, options)
+const { data, error, isValidating, mutate } = useSWR(key, fetcher, options)
 ```
@@ -107,3 +107,3 @@
 - `isValidating`: if there's a request or revalidation loading  
-- `revalidate`: function to trigger the validation manually
+- `mutate`: function to mutate the cached data
 
@@ -125,2 +125,3 @@ #### Options
 - `errorRetryInterval = 5000`: error retry interval [(details)](#error-retries)
+- `errorRetryCount`: max error retry count [(details)](#error-retries)
 - `onLoadingSlow`: callback function when a request takes too long to load (see `loadingTimeout`)
@@ -147,2 +148,4 @@ - `onSuccess`: callback function when a request finishes successfully
 - [Mutation and Post Request](#mutation-and-post-request)
+- [Mutate Based on Current Data](#mutate-based-on-current-data)
+- [Returned Data from Mutate](#returned-data-from-mutate)
 - [SSR with Next.js](#ssr-with-nextjs)
@@ -296,3 +299,3 @@ - [Suspense Mode](#suspense-mode)
 You can broadcast a revalidation message globally to all SWRs with the same key by calling
-`trigger(key)`.
+`mutate(key)`.
 
@@ -303,3 +306,3 @@ This example shows how to automatically refetch the login info (e.g.: inside `<Profile/>`)
 ```js
-import useSWR, { trigger } from 'swr'
+import useSWR, { mutate } from 'swr'
 
@@ -315,3 +318,3 @@ function App () {
         // tell all SWRs with this key to revalidate
-        trigger('/api/user')
+        mutate('/api/user')
       }}>
@@ -366,2 +369,29 @@ Logout
 
+### Mutate Based on Current Data
+
+In many cases, you are receiving a single value back from your API and want to update a list of them.
+
+With `mutate`, you can pass an async function which will receive the current cached value, if any, and let you return an updated document.
+
+```js
+mutate('/api/users', async users => {
+  const user = await fetcher('/api/users/1')
+  return [user, ...users.slice(1)]
+})
+```
+
+### Returned Data from Mutate
+
+Most probably, you need to data mutate used to update the cache when you passed a promise or async function.
+
+The function will returns the updated document, or throw an error, everytime you call it.
+
+```js
+try {
+  const user = await mutate('/api/user', updateUser(newUser))
+} catch (error) {
+  // Handle an error while updating the user here
+}
+```
+
 ### SSR with Next.js
@@ -368,0 +398,0 @@

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Fixed alerts

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Improved metrics

Total package byte prevSize

76706

increased by3.47%

Lines of code

1041

increased by2.56%

Number of lines in readme file

494

increased by6.47%

No dependency changes