ggarnier
Modern Asynchronous JavaScript: displaying images as they're loaded (page 50)
In Aborting Multiple Fetch Requests with One Signal section, the code in abort/abort_ex09.js doesn’t show the downloaded images until Promise.all fulfills, which means you need to wait for all the image downloads before seeing them. Also, if you cancel after some downloads have finished, you won’t see those images.
I suggest a small change to make it display the images as the corresponding promise fulfills:
33c33,38
< const tasks = urls.map(url => fetch(url, {signal: controller.signal}));
---
> const tasks = urls.map(url => fetch(url, {signal: controller.signal}).then(async (r) => {
> const img = document.createElement('img');
> const blob = await r.blob();
> img.src = URL.createObjectURL(blob);
> gallery.appendChild(img);
> }));
36,43c41,43
< const response = await Promise.all(tasks);
< response.forEach(async (r) => {
< const img = document.createElement('img');
< const blob = await r.blob();
< img.src = URL.createObjectURL(blob);
< gallery.appendChild(img);
< });
< result.textContent = '';
---
> Promise.all(tasks).then(() => {
> result.textContent = '';
> });
Marked As Solved
Faraz
Author of Modern Asynchronous JavaScript
Oh, my bad!
Thanks for clarifying that. We’re updating the code in the next version of the book.
Popular Community topics
Concurrent Data Processing in Elixir is now content complete and I finally found the time I’ve been looking for to dedicate behind readin...
New
The very first time I’ve seen a line of Elixir I was in awe. Coming from Ruby the syntax was familiar.
But I wanted to know what was thi...
New
TL;DR I am reading “Domain Modeling Made Functional” and discussing and keeping a journal of what I learned from it, any co-readers welco...
New
I have read first chapter. Will add my notes / code tries / self exploration as I go along!
Thank you @AstonJ for encouraging to start ...
New
In Aborting Multiple Fetch Requests with One Signal section, the code in abort/abort_ex09.js doesn’t show the downloaded images until Pro...
New
Anyone is interested in a classical textbook for algorithms can go and check that.
New
With AI set to play a big role in our industry Elixir users are lucky to have Nx, so we’re running our Nx related book club on Genetic Al...
New
With Phoenix and LiveView having recently had a fairly major release, and Programming Phoenix LiveView being updated too, we thought it w...
New
When the pandemic, heart disease, and personal tragedy threatened to steal everything the Tates spent years building, they found hope, he...
New
Learning Domain-Driven Design
Building software is harder than ever. As a developer, you not only have to chase ever-changing technologic...
New
Other popular topics
What chair do you have while working… and why?
Is there a ‘best’ type of chair or working position for developers?
New
New
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face:
https://on...
New
New
This looks like a stunning keycap set :orange_heart:
A LEGENDARY KEYBOARD LIVES ON
When you bought an Apple Macintosh computer in the e...
New
Do the test and post your score :nerd_face:
:keyboard:
If possible, please add info such as the keyboard you’re using, the layout (Qw...
New
If you get Can't find emacs in your PATH when trying to install Doom Emacs on your Mac you… just… need to install Emacs first! :lol:
bre...
New
Big O Notation can make your code faster by orders of magnitude. Get the hands-on info you need to master data structures and algorithms ...
New
This is cool!
DEEPSEEK-V3 ON M4 MAC: BLAZING FAST INFERENCE ON APPLE SILICON
We just witnessed something incredible: the largest open-s...
New
Curious what kind of results others are getting, I think actually prefer the 7B model to the 32B model, not only is it faster but the qua...
New
Categories:
Sub Categories:
Popular Portals
- /elixir
- /rust
- /wasm
- /ruby
- /erlang
- /phoenix
- /keyboards
- /python
- /js
- /rails
- /security
- /go
- /swift
- /vim
- /clojure
- /java
- /emacs
- /haskell
- /svelte
- /onivim
- /typescript
- /kotlin
- /c-plus-plus
- /crystal
- /tailwind
- /react
- /gleam
- /ocaml
- /flutter
- /elm
- /vscode
- /ash
- /html
- /opensuse
- /zig
- /deepseek
- /centos
- /php
- /scala
- /react-native
- /lisp
- /sublime-text
- /textmate
- /nixos
- /debian
- /agda
- /django
- /deno
- /kubuntu
- /arch-linux
- /nodejs
- /ubuntu
- /revery
- /manjaro
- /spring
- /julia
- /diversity
- /lua
- /markdown
- /slackware









