I recently was trying to stream some NDJSON to a service worker and also into a comment feed. It was a bit of an issue finding just a NDJSON reader as anything I could find was a reader → new readableStream pipe. (retur…
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## [The example from chapter 15 of the book "Learning React" 2nd edition does not work as planned](https://forum.kirupa.com/t/the-example-from-chapter-15-of-the-book-learning-react-2nd-edition-does-not-work-as-planned/646631)
Hi, Kirupa! I express my gratitude for the book “Learning React” 2nd edition! It really helps in quickly and easily learning the React library. When you run the example in Chapter 15, the code does not work as expected. …
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## [Using codepen.io as a testbed](https://forum.kirupa.com/t/using-codepen-io-as-a-testbed/646694)
I am trying to complete Chapter 4 in Learning React… I have seen the errata and have another issue. I am only seeing plain, unformatted text in the output. I am using codepen.io as my development platform and have ente…
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## [Scanning QR codes from camera livestream (camera stream embedded in HTML page)](https://forum.kirupa.com/t/scanning-qr-codes-from-camera-livestream-camera-stream-embedded-in-html-page/646636)
Hello Fellow Devs, I recently came across a related article while trying to figure out QR scanning for my desktop app. My code is as it is on the quoted article below; Article on adding to Camera live stream to your HT…
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## [? order of execution / or who done what to whom and when ?](https://forum.kirupa.com/t/order-of-execution-or-who-done-what-to-whom-and-when/646505)
Hello , I am having trouble with promises , or who done what to whom and when ? Pls , what is the order of execution with the following code: const wait = time =\> new Promise((resolve) =\> setTImeout(resolve, time)) ;…
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## [undefined issue with looping arrays?](https://forum.kirupa.com/t/undefined-issue-with-looping-arrays/646582)
Just getting my feet wet in Development. I already see frustration setting in but will not give up easily. I want to learn. Have a few projects that I am doing for a boot camp. Could use veteran eyes and see why it is c…
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## [React.js](https://forum.kirupa.com/t/react-js/646570)
Hello , i hope you doing well. i have question regarding React Router. The below , MainPAgeContainer compenent did not show on display. Header and Search is displaying MainPageContainer not. Could you tell me please t…
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## [New Flash Games](https://forum.kirupa.com/t/new-flash-games/22477)
Hi there folks- Brand new to the forum, so go easy on me! I've just finished work on my first couple of Flash games, which you can have a look at at www.adamtwycross.co.uk Any input, advice, or feedback always welc…
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## [The Ken Burns Effect | Frontend Coding Exercises](https://forum.kirupa.com/t/the-ken-burns-effect-frontend-coding-exercises/633786)
by kirupa | 18 September 2015 Ken Burns is a pretty famous (and award-winning) documentary film maker. While I haven't personally seen any of his documentaries, it's not cool to admit that publically. If you hav…
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## [Code design: anchoring sidebar components](https://forum.kirupa.com/t/code-design-anchoring-sidebar-components/645106)
I am working on building a site for a “virtual comic book” in react. For context, I’m very new to web dev (I just finished working through Kirupa’s react book), so the entire website is just various instances of the div…
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## [A form calculating the price from the required fields, plus optional fields](https://forum.kirupa.com/t/a-form-calculating-the-price-from-the-required-fields-plus-optional-fields/646365)
For now, I have set up all the input of the form to enter a value to calculate the price, now a change is needed, there are fields that are not required to calculate the price from the required fields, and now how to do …
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## [How can I capture all the \ inside an iframe from parent ?](https://forum.kirupa.com/t/how-can-i-capture-all-the-a-inside-an-iframe-from-parent/646198)
Hello & Thanks in advance ; I am having the darndest time figuring out how to access the DOM insside an iframe . How can I capture all the inside an iframe from parent , and generally walk my way around the iframe . …
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## [Justify Content Issues](https://forum.kirupa.com/t/justify-content-issues/645678)
I have a container with 3 items. I am testing the following values for the justify-content property - flex-start (works as it should positioning all items to the LS of the container) flex-end(also works as it should pl…
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## [Relative Positioning Issues](https://forum.kirupa.com/t/relative-positioning-issues/646182)
https://www.freecodecamp.org/news/learn-the-basics-the-css-position-property/ \<\< We will also give its parent element a relative position so that it does not get positioned relative to the element. \>\> .parent-element …
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## [? if (y.document)y = y.document; ?](https://forum.kirupa.com/t/if-y-document-y-y-document/646147)
Hello ; I am having trouble understanding lines 2 and 3 below: how would I read it out loud in a sentence what is going on ? var x = document.getElementById("myframe"); var y = (x.contentWindow || x.contentDocument); …
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## [Links are Outside the Border](https://forum.kirupa.com/t/links-are-outside-the-border/645507)
Why doesn’t the red border encompass the 2 links at the bottom? \ \ \Messing With Page Layouts\ \ \
**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Replies:** 2\
**Last updated:** [February 13, 2021, 1:23am UTC](https://forum.kirupa.com/t/disabling-form-autocompletion/646060 "2021-02-13T01:23:44Z")
This is a companion discussion topic for the original entry at https://www.kirupa.com/html5/disable\_form\_autocomplete.htm
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## [Flash to WASM](https://forum.kirupa.com/t/flash-to-wasm/646016)
Apparently Flash has been implemented in WASM by Ruffle (Rust) and CheerpX. Maybe theres still hope for Flash…
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## [What is everyone's favorite book(s)?](https://forum.kirupa.com/t/what-is-everyones-favorite-book-s/14702)
Strange question - I know, but I was just browsing through the bestseller lists and noticed a wide diversity of books that are popular today. I found everything from fitness to golf to teaching elephants how to dance IBM…
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## [Mapping, Filtering, and Reducing Things in an Array](https://forum.kirupa.com/t/mapping-filtering-and-reducing-things-in-an-array/637057)
This is the happening place to discuss what is going on with \`map\`, \`filter\`, and \`reduce\`: http://www.kirupa.com/html5/arrays\_map\_filter\_reduce.htm :slight\_smile:
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## [Vertical Alignment Issues](https://forum.kirupa.com/t/vertical-alignment-issues/645925)
Given the fact that I am using a grid here - what is the approach I should be using here for vertical alignment of the contents. I thought it might be display: flex but I don’t know if that’s compatible with the contain…
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## [I want to Style my cursor in JS with an image file on my computer](https://forum.kirupa.com/t/i-want-to-style-my-cursor-in-js-with-an-image-file-on-my-computer/645953)
Hey, I am trying to style my cursor using Javascript only as shown below; \ window.addEventListener("click", function(){ document.body.style.cursor="url('../img/point.svg'),pointer"; \ It does not find …
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## [Sumac Sequence Calculator](https://forum.kirupa.com/t/sumac-sequence-calculator/645957)
I randomly stumbled upon this Sumac Sequence challenge, and while I wasn’t interested in coming up with the most compact solution, it was something that I wanted to build a readable solution and tutorial around! See it …
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## [Inline template diffing vanilla JS](https://forum.kirupa.com/t/inline-template-diffing-vanilla-js/645924)
Hey guys, Just curious, does anybody know of a better way of diffing an inline template? I have tried using the HTML template instead of script type = ‘text/template’ but the innerHTML.toString() causes it to be 30-40%…
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## [I want to get two seperate instances of cursor values in my clientX/Y; method in JavaScript](https://forum.kirupa.com/t/i-want-to-get-two-seperate-instances-of-cursor-values-in-my-clientx-y-method-in-javascript/645929)
Hey, So i have this challenge with my code. I want it to store the cursor values after mouse event is triggered. Here is my JS code trying to have two sets of cursor values stored; \ function RHS(){ var e = wi…
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## [Has swift outpaced Objective-C on iOS?](https://forum.kirupa.com/t/has-swift-outpaced-objective-c-on-ios/645904)
Is swift now regarded as the preferred option over Objective-C on iOS? Im not sure if there’s any concrete data public but just curious
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## [Using Variables in HTML Markup - JavaScript](https://forum.kirupa.com/t/using-variables-in-html-markup-javascript/645826)
Hi All, Is there a way to use a JavaScript Variable inside of a HTML file? Do I need to use another library? Basically, I want to make it easy for for someone who doesn’t know HTML to edit all the urls in one place. …
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## [My request for data from server using the XMLHttpRequest, keeps returning undefined](https://forum.kirupa.com/t/my-request-for-data-from-server-using-the-xmlhttprequest-keeps-returning-undefined/645880)
I tried to request data from this server address https://codexpression.github.io/catz/catz.json using AJAX XMLHttpRequest, but when I tried to console.log the property value of the text, I keep getting “undefined”, plea…
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## [Inserting it to database after a capturing image.](https://forum.kirupa.com/t/inserting-it-to-database-after-a-capturing-image/645869)
Hello Mam how do i insert the images on to the database using php?? kindly help \ \ \ \ \ \Display Webcam Stream\ \ #container { margin: 0px auto; …
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## [Running Your Code at the Right Time](https://forum.kirupa.com/t/running-your-code-at-the-right-time/352075)
Run your code at the right time by making sense of DOMContentLoaded, load, async, defer, and position in the DOM! This is a companion discussion topic for the original entry at http://www.kirupa.com/html5/running\_your\_…
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