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ComponentWillReceiveProps Called Once With Multiple Sync Dispatches but Called Multiple Times With Async Dispatches?


ComponentWillReceiveProps Called Once With Multiple Sync Dispatches but Called Multiple Times With Async Dispatches?

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ComponentWillReceiveProps Called Once With Multiple Sync Dispatches but Called Multiple Times With Async Dispatches?
Tag : reactjs , By : MJRider
Date : November 29 2020, 04:01 AM

seems to work fine Yes, this is because React batches updates if they are caused within a React event handler. Dispatching Redux actions ultimately results in calls to setState(). So, in the first case, both dispatched actions result in a single React re-render. In the second case, it results in two React re-renders.

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Multiple url dispatches with Regex


Tag : python , By : Eugenio
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Good question. ( for posting the full code here. Now I see what you are after, I think.) The easiest solution would be to reverse the patterns like this:
urlpatterns = patterns('',
    url(r'^sitemap\.xml$', 'django.contrib.sitemaps.views.sitemap', {'sitemaps': sitemaps}),
    url(ur'(?P<search_word>[ÆØÅæøåa-zA-Z]*)/?$', 'website.views.index_view', name='website_index'),
)

Redux: async and sync dispatches


Tag : reactjs , By : Nate Bedortha
Date : March 29 2020, 07:55 AM
hop of those help? It's not guaranteed. What you could do is pass saveProfileToServer the new form data have it update state and send the updated form data to the server.
As per the react documentation

Lifecycle componentWillReceiveProps is called multiple times


Tag : reactjs , By : SilverRuby
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I can't tell you why it is called twice, but I can tell you that it should not matter. The problem is that you're not comparing the props for what has changed. If you do this, the code will behave the way you want:
componentWillReceiveProps: function(newProps) {
  if (newProps.params.city !== this.props.params.city) {
    this.makeRequest(newProps.params.city);
  }
},

Multiple async dispatches on page load gives error?


Tag : javascript , By : user112141
Date : March 29 2020, 07:55 AM
should help you out You have two options.
To spread the action.data. In this approach you have to modify how you will be accessing the elements.
{
  ...state,
  ...action.data,
}
{
  ...state,
  data: {
    ...state.data,
    ...action.data,
  },
}

About Redux-thunk, if a handler dispatches a function to be called, why not call it directly?


Tag : reactjs , By : Arun Thomas
Date : March 29 2020, 07:55 AM
it should still fix some issue Redux Thunk is a very thin middleware (like 14 lines thin) that introduces the convention that Redux should know how to deal with asynchronous processes for you.
You said
const store = {
  dispatch() {
    console.log("Dispatch");
  }
};

// Action creator that retuns an action
const inc = () => ({
  type: "INCREMENT"
});

// Impure action creator that you shouldn't use
const badAsyncInc = () => {
  setTimeout(() => {
    store.dispatch({
      type: "INCREMENT"
    });
  }, 1000);
};

// Action creator that returns a function that takes dispatch as arg
const aInc = () => dis => setTimeout(() => dis({
  type: "INCREMENT"
}), 1000);

/*
 * The following will do everything including waiting to dispatch
 * and dispatching to the store.  That's good, but not good for
 * when we want to use a different store.
 */
badAsyncInc()();

/*
 * The following is the "manual" way of wiring up the delayed
 * dispatch that you have to do without Redux Thunk.
 */
aInc()(store.dispatch);

/*
 * With Redux Thunk, this will call the "fn2" immediately but also
 * pass the dispatch function to "fn2" for you so that you don't 
 * have to wire that up yourself.
 */
store.dispatch(aInc);
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