It’s important to know that having fundamental JS knowledge should be given higher priority than having framework or lib

Author : iyon
Publish Date : 2021-01-05 07:27:36


It’s important to know that having fundamental JS knowledge should be given higher priority than having framework or lib

When I stumbled upon React, I barely had any JS knowledge. I had been told by my peers and the internet, of course, that some JavaScript knowledge would be necessary to start with React JS, but, I took the chance. Belonging to the kind of people that “learn by doing” , I went on to explore the JavaScript world and JSX that comes with React.

Think about what would happen if the list is prepended, since React only relies on the keys to decide if the DOM should be updated. Read about this here. The article demonstrates the problem using a very good example of text inputs.

Changing your relationship beliefs the right way Are outdated or archaic relationship beliefs damaging your ability to connect? Change these beliefs the right way.medium.com

Later, when I noticed the same behaviour in something more complex , it bugged me. That’s when I realised that this behaviour was only visible in development and not in production. I searched online and found that, it was due to Strict Mode. I noticed that in index.js, my app was wrapped within .

This is not a huge problem here, but imagine an event listener being attached to an object, in useEffect and getting stale state inside it. Check out this SO answer which shows the proper way to use event listeners in useEffect.

Quoting from the ReactJS documentation itself: “Strict mode can’t automatically detect side effects for you, but it can help you spot them by making them a little more deterministic. This is done by intentionally double-invoking the following functions: Class component constructor, render, and shouldComponentUpdate methods.”

This one, I had to struggle a lot to get my head around. For someone who had no idea about closures and why they were important in the context of React, I had to read a lot about the “behind-the-scenes” of React.

From the official docs: “Keys help React identify which items have changed, are added, or are removed. Keys should be given to the elements inside the array to give the elements a stable identity.”

It’s important to know that having fundamental JS knowledge should be given higher priority than having framework or library specific knowledge. Because, regardless of what library you use , you still have to write JS code and deal with JS related concerns. It’s important not to limit yourself to a specific framework/library and it’s possible only by having a strong JS base.

I had a heading and a button to toggle it’s content. I also had a console.log inside the function to log a message every time state was changed and a re render was triggered.

Be the partner you seek to attract. Don’t expect someone grand to come into your life when you’re operating at a lower standard than you could be. To meet the right person, we have to be in the right places. That happens when we cultivate enough self-confidence to pursue the things you want and learn how to meet our own physical and emotional needs. Set some standards and some boundaries, then get specific about what your vision for the future is. The perfect partner for us is out there and waiting, but they first need us to realize our own power and self-worth. If you’re ready for love, take the initiative, take action, and become the person you were always meant to be.

When it comes to building a long-term relationship, there are specific qualities we should be looking for in our partners. From confidence to a sense of humor, these specifics are important…but they aren’t the bottom line. In order to bring the right person in our lives for love, we have to first learn how to love ourselves and become the type of partner that we want.

Changing your relationship beliefs the right way Are outdated or archaic relationship beliefs damaging your ability to connect? Change these beliefs the right way.medium.com

http://team.vidrio.org/xpy/videos-Bili-Tygri-Liberec-HC-Vitkovice-Ridera-v-en-gb-qin-.php

http://startup.munich.es/dyn/v-ideos-bili-tygri-liberec-v-vitkovice-ridera-v-cs-cs-1vln-23.php

http://main.ruicasa.com/tgq/v-ideos-france-v-serbie-v-fr-fr-1wzh-12.php

http://team.vidrio.org/xpy/Video-Bili-Tygri-Liberec-HC-Vitkovice-Ridera-v-en-gb-wdg-.php

http://main.ruicasa.com/tgq/v-ideos-france-v-serbie-v-fr-fr-1jzi-19.php

http://old.cocir.org/media/qas/video-Brynas-IF-IK-Oskarshamn-v-en-gb-1lvc-21.php

http://elta.actiup.com/cqn/v-ideos-godoy-cruz-v-estudiantes-de-la-plata-v-es-ar-1yvh-18.php

http://startup.munich.es/dyn/video-bili-tygri-liberec-v-vitkovice-ridera-v-cs-cs-1gil-2.php

http://startup.munich.es/dyn/v-ideos-bili-tygri-liberec-v-vitkovice-ridera-v-cs-cs-1kbr-7.php

http://molos.bodasturias.com/qxz/video-sibir-novorossiisk-v-lokomotiv-iaroslavl-v-ru-ru-1csz-9.php

http://elta.actiup.com/cqn/video-godoy-cruz-v-estudiantes-de-la-plata-v-es-ar-1din-7.php

http://old.cocir.org/media/qas/video-brynas-v-oskarshamn-v-sw-sw-1ctl-21.php

http://main.ruicasa.com/tgq/videos-france-v-serbie-v-fr-fr-1lof-18.php

http://team.vidrio.org/xpy/v-ideos-verva-litvinov-v-energie-karlovy-vary-v-cs-cs-1iwt-11.php

http://team.vidrio.org/xpy/Video-verva-litvinov-v-energie-karlovy-vary-v-cs-cs-1rup-2.php

http://elta.actiup.com/cqn/v-ideos-godoy-cruz-v-estudiantes-de-la-plata-v-es-ar-1uxj-11.php

http://old.cocir.org/media/qas/video-brynas-v-oskarshamn-v-sw-sw-1zlz-28.php

http://old.cocir.org/media/qas/videos-brynas-v-oskarshamn-v-sw-sw-1izz-21.php

http://main.ruicasa.com/tgq/video-france-v-serbie-v-fr-fr-1bjf-27.php

http://team.vidrio.org/xpy/video-verva-litvinov-v-energie-karlovy-vary-v-cs-cs-1ftw-20.php

g should be targeted. If you go read a book about spaceships, but you work in sales, then it won’t really help you make any more money (unless you’re a salesperson in the spaceship business). Look at the potential return-on-investment for every skill upgrade. That way, you’re always positioning yourself in a way that increases your income.

function App() { const [state, toggle] = useState(0); useEffect(()=>{ setInterval(()=>{ console.log(`state ${state}`); },3000) },[]) return (



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