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Tag: WebDev
Web development news and tutorials
StackOverflow.com
Random snippets of all sorts of code, mixed with a selection of help and advice.
having trouble getting d3 graph to show bars when using array of data
6 April 2026 @ 5:54 pm
I have an array of data showing years and percents and I'm trying to draw a bar graph using d3. I can get a single bar drawn if I feed in numbers that I know will work, but when I'm using the x and y axes and an array of data, nothing is showing. I get no error messages.
I am super new to d3 and struggling with the learning curve, so if someone could explain the issues here, I would greatly appreciate it.
<!DOCTYPE html>
<div id="container"></div>
<script src="https://cdn.jsdelivr.net/npm/d3@7"></script>
<script type="module">
// Declare the chart dimensions and margins.
const width = 1140;
const height = 500;
const marginTop = 20;
const marginRight = 20;
const marginBottom = 50;
const marginLeft = 70;
// Declare the x (horizontal position) scale.
const x = d3.scaleUtc()
.domain([new Date("2017-01-01"), new Date("2024-01-01")])
.range([marginLeft, wi
Is calling `omp_pause_resource` allowed after forking (v.s. before forking)?
6 April 2026 @ 5:49 pm
I have a question on what is technically allowed by the omp standard when it comes to relinquish resources (using omp_pause_resource) with forking.
I understand that in section 12.12, pause_resource.1.c of the omp examples pdf, it explicitly allows calling omp_pause_resource before forking, and it's safe to use omp after forking inside the child (and the parent).
I'd like to know that if the omp standard also allows the same example, but calling omp_pause_resource after forking? I.e. is the following allowed and is the behaviour after forking equivalent to the pause_resource.1.c example in section 12.12?
//initializes omp (for eg, a #pragma omp parallel call)
pid_t pid = fork(); //suppose fork() doesn't fail
if (pid == 0){
//child process
omp_pause_resource(omp_pause_
Canva Button SDK returns 403 Forbidden on embed?action=createDesign in Vite + React app — why?
6 April 2026 @ 5:33 pm
I'm integrating the Canva Button into a Vite + React app. The SDK loads and my React button calls createDesign, but the SDK's embed request returns HTTP 403 and the Canva editor shows a "Forbidden (403)" modal. I followed the docs (SDK script in index.html, initialize then createDesign) and tried the usual suggestions (referrer meta, adding origin to Canva allowlist, using VITE_ env var), but it still returns 403.
I want to know what exact conditions cause Canva to return 403 for the embed request and how to fix it — in particular, what headers/values Canva expects and what I should check in my network trace.
Environment
Vite dev server (default)
React 18
Tailwind (styling only)
Browser: Chrome (latest)
Dev origin used: http://localhost:5173 (also tried 3000)
Canva SDK added via <script src=&q
How can I create a vector in R where each number in the output is double the last number?
6 April 2026 @ 5:33 pm
For example, I am trying to create a vector where the output would be 1, 2, 4, 8, 16... and so on.
I was attempting to use the "rep" function, but now I am not even sure if that's the right place to start. I am new to R so bear with me!
Sorting with MongoDB Java driver during aggregation pipeline by a Mutated(?) value
6 April 2026 @ 5:26 pm
I am executing the following query on my MongoDB using the Java driver
private static AggregateIterable<Document> averageVendorTotalSent(MongoCollection<Document> collection) {
return collection.aggregate(Arrays.asList(
Aggregates.group("$transaction vendor", Accumulators.avg("Average Vendor Transaction Sent", "$amount sent"))
));
}
On a collection with Documents formatted like
_id: "69cb3d75c6146e2646e66330"
date: "2026-02-17"
transaction vendor: "TIM HORTONS #47 _F"
amount sent: 11.21
amount received: 0
remainingBalance: 3269.39
here is part of the output
{"_id": "SQ *THE TASTE O _F", "Average Vendor Transaction Sent": 25.82}
{"_id": "HECTOR'S YOUR I", "Average Vendor Transaction Sent": 27.72}
{"_id": "TIM HORTONS #47 _F&quo
What is Power Pivot in Excel and when should a beginner use it?
6 April 2026 @ 5:24 pm
I am a beginner learning Microsoft Excel, and recently discovered the Power Pivot feature.
I understand basic Excel features like formulas and PivotTables, but I am confused about when Power Pivot is actually needed.
I would like to know:
What problem does Power Pivot solve that regular PivotTables cannot?
When should I start using Power Pivot as a beginner?
Can someone explain with a simple real-life example (like sales data, reports, etc.)?
For example, if I have multiple Excel sheets with related data, is that a case where Power Pivot is useful?
I am looking for a simple explanation with practical use cases.
How to properly sort in a lazy loading way in Python?
6 April 2026 @ 5:22 pm
Is there a way to reuse some loop to sort the final result?
I used the sorted but its not lazy loading, i wanted to find a way to rewrite my code in a way where everything is done lazyly. Its is possible? What solutions do you recommend me to do?
from dataclasses import dataclass
from datetime import date
import csv
@dataclass
class Product():
Id: int
Code: str
Quantity: int
Price: float
Date: str
Country: str
def read_rows(filename):
with open(filename, "r") as f:
reader = csv.DictReader(f)
for row in reader:
#print(row)
yield row
def parse_rows(rows):
for row in rows:
try:
yield Product(
Id=int(row["Id"]),
Code=row["Code"],
Quantity=int(row["Quantity"]),
Price=float(row["Price"]),
Date=row["Date"],
Country=row[&
Java ConnectException: Connection refused [closed]
6 April 2026 @ 5:22 pm
Recently, I've started a project about making a game of Otello on the command line. The game needs 1 server and 2 clients to play. I've finished development of the game part, and moved on to the networking part (which I'm new to).
At first, I tried running both a client and the server on my own computer, and everything went perfectly. But, when I deployed the programs to their respective VMs, I got this error message when running the client (the server was running):
Exeption in thread "main" java.net.ConnectException: Connection refused
[...]
at contactServ.startConnection(contactServ.java:10)
at Main.main(Main.java:9)
The VMs are all connected through an NAT network with DHCP to attribute the IP adresses. The server is running on a Debian 12 machine and th client is running on a Mint one.
Here's the Main class:
import java.io.IO
How would you describe the Java programming language to a beginner?
6 April 2026 @ 3:14 pm
I've noticed in my Information Systems course that many people still lack the specific knowledge to program, and don't even understand a new and complex language like Java. We're in our third semester, and even so, we're having a lot of difficulty really understanding what the professors are actually trying to teach. Therefore, I'd like to know, "If you were teaching someone Java from scratch, what would your explanation be for understanding the basics?"
Why does my HashSet allow duplicate objects in Java even when values are same? [duplicate]
6 April 2026 @ 1:51 pm
I am trying to store unique objects in a HashSet, but it still allows duplicates even though the values are the same.
Here is my code:
import java.util.HashSet;
import java.util.Set;
class Student {
int id;
Student(int id) {
this.id = id;
}
}
public class Test {
public static void main(String[] args) {
Set<Student> students = new HashSet<>();
students.add(new Student(1));
students.add(new Student(1));
System.out.println(students.size());
}
}
Expected output:
1
Actual output:
2
Why is HashSet allowing duplicate objects even when the id is the same?
Do I need to override something in the Student class to make it work correctly?
960.gs
CSS Grid System layout guide
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Totally free icons
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Interface elements for jQuery
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WordPress Themes, HTML Templates.
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color / colour themes by design
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Web Analytics::Free Resources from Immeria
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WebAIM.org
Web Accessibility In Mind
Ask AIMee: An accessible accessibility-focused AI chatbot
31 March 2026 @ 4:49 pm
We’re happy to introduce AIMee – an easy-to-use, AI-powered conversational chatbot focused on accessibility. AIMee has been designed to be highly accessible to users with disabilities. Ask her accessibility questions to get quick answers and guidance. The name “AIMee” plays off of the “AIM” (Accessibility In Mind) from “WebAIM” and also “AI”. Here are some […]
A New Path for Digital Accessibility?
27 February 2026 @ 7:02 pm
Please note This post will explore how an adaptive, intelligent system could empower users with disabilities to optimize their experience in digital environments. Even were such a system available tomorrow, developers of digital content, services, and products would still be responsible for providing equal access to ALL users. Consider a few of the many exciting […]
2026 Predictions: The Next Big Shifts in Web Accessibility
22 December 2025 @ 11:22 pm
I’ve lived long enough, and worked in accessibility long enough, to have honed a healthy skepticism when I hear about the Next Big Thing. I’ve seen lush website launches that look great, until I activate a screen reader. Yet, in spite of it all, accessibility does evolve, but quietly rather than dramatically. As I gaze […]
Word and PowerPoint Alt Text Roundup
31 October 2025 @ 7:14 pm
Introduction In Microsoft Word and PowerPoint, there are many types of non-text content that can be given alternative text. We tested the alternative text of everything that we could think of in Word and PowerPoint and then converted these files to PDFs using Adobe’s Acrobat PDFMaker (the Acrobat Tab on Windows), Adobe’s Create PDF cloud […]
Accessibility by Design: Preparing K–12 Schools for What’s Next
30 July 2025 @ 5:51 pm
Delivering web and digital accessibility in any environment requires strategic planning and cross-organizational commitment. While the goal (ensuring that websites and digital platforms do not present barriers to individuals with disabilities) and the standards (the Web Content Accessibility Guidelines) remain constant, implementation must be tailored to each organization’s needs and context. For K–12 educational agencies, […]
Up and Coming ARIA
30 May 2025 @ 6:19 pm
If you work in web accessibility, you’ve probably spent a lot of time explaining and implementing the ARIA roles and attributes that have been around for years—things like aria-label, aria-labelledby, and role="dialog". But the ARIA landscape isn’t static. In fact, recent ARIA specifications (especially ARIA 1.3) include a number of emerging and lesser-known features that […]
Global Digital Accessibility Salary Survey Results
27 February 2025 @ 8:45 pm
In December 2024 WebAIM conducted a survey to collect salary and job-related data from professionals whose job responsibilities primarily focus on making technology and digital products accessible and usable to people with disabilities. 656 responses were collected. The full survey results are now available. This survey was conducted in conjunction with the GAAD Foundation. The GAAD […]
Join the Discussion—From Your Inbox
31 January 2025 @ 9:01 pm
Which WebAIM resource had its 25th birthday on November 1, 2024? The answer is our Web Accessibility Email Discussion List! From the halcyon days when Hotmail had over 35 million users, to our modern era where Gmail has 2.5 billion users, the amount of emails in most inboxes has gone from a trickle to a […]
Using Severity Ratings to Prioritize Web Accessibility Remediation
22 November 2024 @ 6:30 pm
So, you’ve found your website’s accessibility issues using WAVE or other testing tools, and by completing manual testing using a keyboard, a screen reader, and zooming the browser window. Now what? When it comes to prioritizing web accessibility fixes, ranking the severity of each issue is an effective way to prioritize and make impactful improvements. […]
25 Accessibility Tips to Celebrate 25 Years
31 October 2024 @ 4:38 pm
As WebAIM celebrates our 25 year anniversary this month, we’ve shared 25 accessibility tips on our LinkedIn and Twitter/X social media channels. All 25 quick tips are compiled below. Tip #1: When to Use Links and Buttons Links are about navigation. Buttons are about function. To eliminate confusion for screen reader users, use a <button> […]
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