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Share a quick tip you learned about web dev this year

Uriel Bitton on June 26, 2020

Hey everyone! Let's share one tip that we learned recently, whether its about javascript, html, css, react, etc. So beginners and even pros can lea...

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Ben Halpern • Jun 26 '20

Adaptive loading is one thing I learned that really stands out

Adaptive Loading - Improving Web Performance on low-end devices

Addy Osmani ・ Nov 18 '19 ・ 3 min read

#webperf #webdev #react #network

For whatever reason when I read that post it really blew my mind.

Uriel Bitton • Jun 26 '20

Awesome. Thanks for sharing Ben!

Vitor Paladini • Jun 26 '20 • Edited

Oooh, I know a good one!

copy() on Chrome DevTools (other browsers probably) adds to your clipboard anything you use as an argument.

That gets really powerful when you use it with "Store as global variable". That way you can log a huge server response, for instance, and copy it from the Dev Tools console.

Here's an example:

Basti Ortiz • Jun 26 '20

I use this all the time when I want to quickly do some web scraping on-the-fly. A little bit of Array#map chaining can easily automate what would have been million Ctrl + Cs.

Uriel Bitton • Jun 26 '20 • Edited

nice one! i'll remember this one :)

Thanks for sharing

AnasAnsari • Jun 26 '20

This is so cool

Thomas • Jun 27 '20 • Edited

I recently found an article describing online/offline detection. It's as easy as:
window.addEventListener('online', () => console.log('online'))
Works for 'offline' events too. You could also check for 'navigator.onLine'

Uriel Bitton • Jun 27 '20

Oh nice. I believe Dev uses a version of that to disolay th3 doodle wheb youre offline ;)

Thomas Bnt • Jun 27 '20

Yeah from here

🚀 Detecting If a User is Online/Offline with JavaScript

Niall Maher ・ Jun 25 ・ 4 min read

#javascript #webdev #beginners #tutorial

Uriel Bitton • Jun 27 '20

Nice

Sadiqur Rahman • Jun 26 '20 • Edited

Don't exhaust yourself. Take it easy and stay focused

Abdur Rehman Khalid • Jun 27 '20

The one thing I want to share here is that it is not related to web development but jobs and works that is related to any kind of development job.

It does not matter how good a learner, strong committer, hard worker, and effective value adder, the company or organization that you are applying or working will appreciate skills that are only required by that organization.

The thing is that how many courses you have completed or how good grades you have achieved in the studies, the organizations and the recruiters will be looking for someone who has the experience of 3-5 years and someone perfect so that they can get high results in a small amount of time.

There are a few companies and organizations that are aiming to train individuals so that they can become good and professional individuals, and also they are not looking forward to creating a strong and beneficial asset for their organization as well.

Uriel Bitton • Jun 27 '20

i totally agree with this. Thanks for sharing!

Abdur Rehman Khalid • Jun 27 '20

your welcome

spiritupbro • Jun 27 '20

you can clone an array in javascript with [...Array] thank you for mr awais for this i dont know his dev.to username but wherever you are thanks

Uriel Bitton • Jun 27 '20

Can you show an example of how you would do that in javascript?

Thanks for sharing!

spiritupbro • Jun 27 '20

really? that was super simple bro

//lets say you have an array like this
let animal=['panda','cat','mongoose'];

//then if you want to clone it one of the method i copy from mr awais is this one
let animalClone=[...animal]

as simple as that

Uriel Bitton • Jun 27 '20

Sweet. Definitely useful! Thanks

spiritupbro • Jun 27 '20

i found it here the original post

Awais

@mrahmadawais

Which method do you prefer to clone an array, and why?

1️⃣ [...arr];
2️⃣ arr.slice(0);
3️⃣ Array.from(arr);
4️⃣ arr.map((x) => x);
5️⃣ arr.concat([]);
6️⃣ JSON.parse(JSON.stringify(arr));

#OneDevMinute #JavaScript #CodeNewbie

14:41 PM - 08 May 2020

229 1105

Derek D • Jun 27 '20

You can do the same with objects. Keep in mind, this doesn't deep clone. So if you intend to change the values in any way, you'll still be mutating the pointer, and by consequence, the original object.

Sankara Gomathy M • Jun 27 '20

I learned that it is always important to use label, title, aria-label or aria-labelledby along with input fields in forms, in order to be accessible by screen readers and assistive technologies.

Uriel Bitton • Jun 27 '20

Very true its becoming increasingly important to add those!

Felipe Kinoshita • Jun 27 '20

Pointers aren't always a good idea!

Kirill Shestakov • Jun 26 '20

This was learnt from my own mistake. Don't use flexbox for everything. If you do, there's performance and code clarity considerations. Think about whether position: absolute can solve the problem just as well.

sanderdebr • Jun 27 '20

When would you prefer position: absolute over flexbox? For centering/aligning I almost allways use flexbox, also over text-align: center. Absolute positioning I use for pseudo elements or floating alerts for example.

Kirill Shestakov • Jun 27 '20 • Edited

My logic is, if something can be done with position: absolute, do it with it. Otherwise, flexbox is ok. With position: absolute you have a lot of freedom: you can center, you can put the element almost anywhere you want and make it behave like you want based on screen size. I think absolute position is often underused. Flexbox, although flexible, might get a bit complicated and will likely reduce your performance. I created a WYSIWYG editor once, whose ancestors were all flexbox. Remember, flexbox has to relayout and repaint if any of its content changed. So, because of that, if you had a lot of content, editing it was unbearably slow and laggy after typing every character.

With position: absolute you can center as well, although not as cleanly, but you can get used to it:

.element {
   top: 50%;
   left: 50%;
   transform: translateX(-50%) translateY(-50%);
}

Uriel Bitton • Jun 26 '20

Mistakes sometimes turn out to be gold !
Nice and thanks for sharing :)