overreacted.io | Personal blog by Dan Abramov | Blog library

 by   gaearon JavaScript Version: Current License: Non-SPDX

kandi X-RAY | overreacted.io Summary

kandi X-RAY | overreacted.io Summary

overreacted.io is a JavaScript library typically used in Web Site, Blog, React, Gatsby applications. overreacted.io has no bugs, it has no vulnerabilities and it has medium support. However overreacted.io has a Non-SPDX License. You can download it from GitHub.

My personal blog. Forked from Gatsby blog starter. Syntax theme based on Sarah Drasner's Night Owl with small tweaks. To run locally, yarn, then yarn dev, then open

            kandi-support Support

              overreacted.io has a medium active ecosystem.
              It has 6649 star(s) with 1666 fork(s). There are 121 watchers for this library.
              It had no major release in the last 6 months.
              There are 52 open issues and 56 have been closed. On average issues are closed in 32 days. There are 166 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of overreacted.io is current.

            kandi-Quality Quality

              overreacted.io has 0 bugs and 0 code smells.

            kandi-Security Security

              overreacted.io has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              overreacted.io code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              overreacted.io has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              overreacted.io releases are not available. You will need to build from source code and install.
              overreacted.io saves you 385 person hours of effort in developing the same functionality from scratch.
              It has 917 lines of code, 0 functions and 38 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed overreacted.io and discovered the below as its top functions. This is intended to give you an instant insight into overreacted.io implemented functionality, and help decide if they suit your requirements.
            • The SEO page .
            • Check to see if a new path has changed
            • Page panel rendering .
            • Returns the pointer coordinates of a pointer .
            • Format a date string for a given date
            • Get a reading time .
            • Replace component renderer with a props path
            • Counts the number of slashes in the given url
            • Escapes characters in a string so that it can be used as a string literal
            Get all kandi verified functions for this library.

            overreacted.io Key Features

            No Key Features are available at this moment for overreacted.io.

            overreacted.io Examples and Code Snippets

            No Code Snippets are available at this moment for overreacted.io.

            Community Discussions


            react component composition but confusing
            Asked 2021-Nov-06 at 00:14

            so I have a code snippet here basically presenting the idea Dan mentioned which is to lift contents up in react to naturally improve performance and write cleaner code. In the InputField component, the Button always renders, this is not the behavior I want, it should skip rendering the Button component .so what it should do is skip the render because Button is inputfield's children props, and if children props does not change, react will skip the render.

            similar concept example explained by Dan: "When the color changes, ColorPicker re-renders. But it still has the same children prop it got from the App last time, so React doesn’t visit that subtree"

            so I am confused here, is that the problem with multiple children props, because InputField has value, onChange, children props, and one of them change, react decides to update others? I have an example here that kinda proves it's not the problem of multiple props.

            Edit: follow up question, in the real world, top level components must have all kinds of useState, state update etc. would that mean the "lift contents up" (component composition) is not practical in the real world? just from the perspective of saving some rendering computing power. (we know it has other benefits like help with some prop drilling) Are there any real world implementations, code examples??



            Answered 2021-Nov-06 at 00:14

            Thanks @Jacob Smit in the comments. solved my problem. My Button component is still two low in the component structure, the 'lift contents up' way is to lift the content(component) up in your code so that when you setState() in the lower component, it won't affect that content(component).so the lower component keeps the props that are bound to pass down. For here, exactly as Jacob said my setState() is triggering re-render of Button and InputField, so Button will be rendered.

            Source https://stackoverflow.com/questions/69831766


            hardcoded Hero slides to gatsby-image-plugin
            Asked 2021-May-19 at 19:47

            My "Home hero slide" is the last hardcoded part of my site. I want to make it dynamic and use the magic of gatsby-image-plugin.

            my site link

            the "hardcoded" codes:




            Answered 2021-May-19 at 19:47

            Something this should work:

            Source https://stackoverflow.com/questions/67593424


            React useEffect and setInterval
            Asked 2021-May-10 at 02:27

            I'm making a React dashboard that calls an API every minute for updates. Following the many answers in SO, I have this at the moment that sort of works:



            Answered 2021-May-10 at 02:27

            You can resolve this issue in multiple way:

            1. You can put getApiData in useEffect direct and use it...

            2. You can use useCallBack, useEffect is go to re-render and make mempry leeek issue since every time react render Dashboard its re-create the getAPIData, you can prevent this case by using useCallBack, and you must make sure about dependency, just you need to put what you need...for example:

            Source https://stackoverflow.com/questions/67463964


            Why does react-spring not repeatedly work?
            Asked 2021-Mar-02 at 19:00


            Answered 2021-Mar-02 at 19:00

            If you want the animation to start again you need to set the reset flag:

            Source https://stackoverflow.com/questions/66444956


            Reducer function passed to useReducer hook is executed multiple times for one dispatch call when reducer function is dependant on a component prop
            Asked 2020-Aug-30 at 13:50

            I was reading an article called “A Complete Guide to useEffect” and tried to implement and an example from “Why useReducer Is the Cheat Mode of Hooks” section.

            In that example there is a Counter component that defines state (just a number) with the help of useReducer hook. Reducer handles only one action — 'tick' on which it increments the state by the value of step prop. 'tick' action is dispatched every second in interval function that is set up in useEffect hook once.
            Here is the code from that example with some minor modifications:



            Answered 2020-Aug-28 at 11:23
            import React from "react";
            import ReactDOM from "react-dom";
            function App() {
              const [step, setStep] = React.useState(0);
              function Counter({ step }) {
                const [count, dispatch] = React.useReducer(reducer, 0);
                function reducer(state, action) {
                  if (action.type === "tick") {
                    console.log(`Reducer: state=${state} and step=${step}`);
                    return step === 0 ? state : state + step;
                  } else {
                    throw new Error(`Unknown action type: ${action.type}`);
                React.useEffect(() => {
                  console.log("Create interval");
                  const id = setInterval(() => {
                    dispatch({ type: "tick" });
                  }, 1000);
                  return () => {
                    console.log("Clear interval");
                }, [dispatch]);
                return {count};
              return (
            const rootElement = document.getElementById("root");
            ReactDOM.render(, rootElement);

            Source https://stackoverflow.com/questions/63632469


            Prevent infinite renders when updating state variable inside useEffect hook with data fetched using useQuery of graphql
            Asked 2020-Jun-22 at 15:53

            Graphql provides useQuery hook to fetch data. It will get called whenever the component re-renders.



            Answered 2020-Jun-22 at 15:40

            I think you misunderstood what you want to be in dependencies array is [data, setStateOfValue] not [data, stateOfValue]. because you use setStateOfValue not stateOfValue inside useEffect The proper one is:

            Source https://stackoverflow.com/questions/62517870


            Can we assign a Typescript class to a useState field of a Functional Component in React?
            Asked 2020-May-22 at 13:00

            I was going through this blog - useEffect complete guide topic and thought to use a - simple Typescript class and update states and see how useEffect behaves.

            Is it ok to assign Typescript class to a useState variable ??

            You can find the link to the example here in CodeSandbox.io

            If JSX...For that matter, what if its just a ES6 class and not Typescript ?



            Answered 2020-May-22 at 12:34

            You are storing the instance of a class in state but you never update it.

            You must note that even though you add items to the stateHelper class but the instance is not changing and hence the useEffect will not be executed again.

            However in order to store instances that remain constant throughout the scope of your component instance its better to make use of useRef instead of useState

            Source https://stackoverflow.com/questions/61954836


            Cannot Get React Hook setInterval Timer to Run During Jest/Enzyme Test
            Asked 2020-May-21 at 20:06

            I am trying to write wrap up writing some tests for this component. I implemented a custom useInterval hook following this blog post from Dan Abramov (code). It basically makes a declarative setInterval function. However, I'm having a difficult time of testing it with Jest and Enzyme. The application was bootstrapped with create-react-app. I have installed the latest versions. When I click the start button, the elapsed time increases and displays on the page perfectly. In the parent component, I update state, which stores elapsed time. It passes the updated elapsed time timer props to Timer.js. Thus, it sows on the screen the correct elapsedTime. This works as expected in the browser. However, the timer doesn't run when running the tests.



            Answered 2020-May-21 at 20:06

            The problem is with jest.useFakeTimers();, more specifically in a place you call it. You are mounting your component in beforeEach, before you fake timers. Because of that your useInterval hook is set up to use real setInterval, not the faked on from jest. The moment you call jest.useFakeTimers(); in a test is too late, as it wouldn't affect anything (you are not creating anything new related to timer).

            If you move it before mount in beforeEach test would work.

            Source https://stackoverflow.com/questions/61923449


            Where to define socket event listeners that require data from global state using Hooks in React
            Asked 2020-Apr-27 at 09:13

            I've been learning hooks and one concept still really bogles me.

            When using useEffect, any variables declared inside becomes old after the next re-render. To get access to changing values inside useEffect, the most common answer, and one Dan Abramov uses himself, is to use the useRef hook instead.

            However, imagine that there is a piece of information that you want to store in a global state using something like Redux, but you also want that information available in callback functions inside useEffect. In my particular case, when my component mounts I need to add event listeners to a web socket connected to the server that signals WebRTC connections. The value that the web socket listener callback functions needs will be updated throughout the application's usage.

            How do I organize a state that is globally accessible, but can also be referenced the same way that a ref made by useRef can be accessed?

            Here's an example of what I mean



            Answered 2020-Apr-27 at 09:13

            The idea about listeners is that they should be destroyed and recreated on closure value updates and cleaned up on unmount. You can add a users dependency to the useEffect and cleanup the listener

            Source https://stackoverflow.com/questions/61452935

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install overreacted.io

            You can download it from GitHub.


            You can translate any article on the website into your language!. Add a Markdown file with the translation to the corresponding article folder. For example index.fr.md in src/pages/optimized-for-change/. If you're the first one to translate a post to your language, you'll need to add it to to the list in ./i18n.js. See this PR for an example. If your language needs special font characters, add it to the appropriate place in this list.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • HTTPS


          • CLI

            gh repo clone gaearon/overreacted.io

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Explore Related Topics

            Consider Popular Blog Libraries


            by hexojs


            by mastodon


            by tootsuite


            by halo-dev


            by vuejs

            Try Top Libraries by gaearon


            by gaearonJavaScript


            by gaearonJavaScript


            by gaearonJavaScript


            by gaearonCSS


            by gaearonJavaScript