# web dev **URL:** https://forum.kirupa.com/c/programming/web-dev/42.md?page=24 [Latest](https://forum.kirupa.com/latest.md) · [Categories](https://forum.kirupa.com/categories.md) **Page:** 25 --- ## [How it is possible billt a website on andirod mobile ?](https://forum.kirupa.com/t/how-it-is-possible-billt-a-website-on-andirod-mobile/658694)
**Author:** [@koko-numes](https://forum.kirupa.com/u/koko-numes)\ **Replies:** 1\ **Last updated:** [May 12, 2023, 4:51pm UTC](https://forum.kirupa.com/t/how-it-is-possible-billt-a-website-on-andirod-mobile/658694 "2023-05-12T16:51:34Z")
Hi, is it possible to make website in node js with template engine and restful api (toghather) for android.i want to create a my own website used on mobile phone anyone suggest me any guidlines. Thanks --- ## [React Router not working](https://forum.kirupa.com/t/react-router-not-working/652078)
**Author:** [@ReactNoob](https://forum.kirupa.com/u/ReactNoob)\ **Replies:** 10\ **Last updated:** [April 24, 2023, 6:24am UTC](https://forum.kirupa.com/t/react-router-not-working/652078 "2023-04-24T06:24:11Z")
Has anyone tried to work through this tutorial? For some reason when I add the content div with routes to the main Component my project stops loading anything. If anyone has any advice or can spot the issue please let … --- ## [Display a Random Image Using the Unsplash API](https://forum.kirupa.com/t/display-a-random-image-using-the-unsplash-api/653866)
**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Replies:** 11\ **Last updated:** [April 20, 2023, 4:55am UTC](https://forum.kirupa.com/t/display-a-random-image-using-the-unsplash-api/653866 "2023-04-20T04:55:12Z")
This is the companion topic to the Display a Random Image Using the Unsplash API coding exercise: --- ## [how to respawn Enemies and Targets](https://forum.kirupa.com/t/how-to-respawn-enemies-and-targets/658171)
**Author:** [@AmiiboAmigos](https://forum.kirupa.com/u/AmiiboAmigos)\ **Replies:** 2\ **Last updated:** [April 19, 2023, 5:32pm UTC](https://forum.kirupa.com/t/how-to-respawn-enemies-and-targets/658171 "2023-04-19T17:32:42Z")
I’m almost done! all I need to do is to add code to respawn enemies and targets to this game in JavaScript. Anyone have any ideas? there aren’t many sources with the kind of code I’m looking for. Replit: Join AnaeliRiv… --- ## [3d react component reusability?](https://forum.kirupa.com/t/3d-react-component-reusability/658012)
**Author:** [@rest](https://forum.kirupa.com/u/rest)\ **Replies:** 3\ **Last updated:** [April 11, 2023, 5:08pm UTC](https://forum.kirupa.com/t/3d-react-component-reusability/658012 "2023-04-11T17:08:40Z")
Hello everyone, I am trying to make 3d react components with react-three-fiber, however, I am not sure if they will be reusable or not? It takes me a long time to animate in 3d and I have medium experience with react bu… --- ## [LinkedList in JavaScript](https://forum.kirupa.com/t/linkedlist-in-javascript/637119)
**Author:** [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Replies:** 5\ **Last updated:** [April 2, 2023, 8:19pm UTC](https://forum.kirupa.com/t/linkedlist-in-javascript/637119 "2023-04-02T20:19:04Z")
Another day, another data structure in JS that every other language takes for granted :slight\_smile: class Node { constructor(data, next = null) { this.data = data; this.next = next; } } class LinkedList { … --- ## [Appian platform Tomcat error: Missing authentication token](https://forum.kirupa.com/t/appian-platform-tomcat-error-missing-authentication-token/657687)
**Author:** [@pushpa1997](https://forum.kirupa.com/u/pushpa1997)\ **Replies:** 1\ **Last updated:** [March 21, 2023, 4:12pm UTC](https://forum.kirupa.com/t/appian-platform-tomcat-error-missing-authentication-token/657687 "2023-03-21T16:12:30Z")
In the Tomcat-log of my on-prem Appian platform I see the following error approximately once a day and not on all machines of my Appian cluster: 00:20:00,050 \[com.appiancorp.quartz.BackgroundJobScheduler\_Worker-1\] ERRO… --- ## [error message](https://forum.kirupa.com/t/error-message/657141)
**Author:** [@asparker](https://forum.kirupa.com/u/asparker)\ **Replies:** 5\ **Last updated:** [February 27, 2023, 5:47pm UTC](https://forum.kirupa.com/t/error-message/657141 "2023-02-27T17:47:53Z")
alert(“3 times 4” + equals + v1 \* v2); I received an error message so I fixed it to this alert(“3 times 4 equals” + v1 \* v2); and it now works but my question is why does it now work when I moved the “” and removed the… --- ## [Closure javascript](https://forum.kirupa.com/t/closure-javascript/656593)
**Author:** [@Kenny\_Fourfox](https://forum.kirupa.com/u/Kenny_Fourfox)\ **Replies:** 8\ **Last updated:** [January 30, 2023, 5:30am UTC](https://forum.kirupa.com/t/closure-javascript/656593 "2023-01-30T05:30:01Z")
//Why is this code not working? function stopWatch() { let startTime = Date.now(); function getDelay() { let elapsedTime = Date.now() — startTime; alert(elapsedTime); } return getDelay; … --- ## [Understanding Dev Tools limitations](https://forum.kirupa.com/t/understanding-dev-tools-limitations/656445)
**Author:** [@david78737](https://forum.kirupa.com/u/david78737)\ **Replies:** 1\ **Last updated:** [January 23, 2023, 5:22pm UTC](https://forum.kirupa.com/t/understanding-dev-tools-limitations/656445 "2023-01-23T17:22:02Z")
This is a noobie question. It’s been a mystery for some time now to discover which CSS class is setting the height of a div in in a page. When I explore the classes in the Classes pane in Dev Tools I am not able to zer… --- ## [What should I do Before I give up programming?](https://forum.kirupa.com/t/what-should-i-do-before-i-give-up-programming/656322)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 10\ **Last updated:** [January 22, 2023, 5:49am UTC](https://forum.kirupa.com/t/what-should-i-do-before-i-give-up-programming/656322 "2023-01-22T05:49:38Z")
I’m in the verge of giving up programming and wondering what could I do before I give up to make sure I did what everyone did. I’ve a bachelors degree in computer science. I didn’t do it as well as I’d have liked to do,… --- ## [multiple cameras being displayed on a single browser window with the help of html](https://forum.kirupa.com/t/multiple-cameras-being-displayed-on-a-single-browser-window-with-the-help-of-html/656387)
**Author:** [@HARITH\_FIRDAUS](https://forum.kirupa.com/u/HARITH_FIRDAUS)\ **Replies:** 5\ **Last updated:** [January 20, 2023, 9:45am UTC](https://forum.kirupa.com/t/multiple-cameras-being-displayed-on-a-single-browser-window-with-the-help-of-html/656387 "2023-01-20T09:45:19Z")
hi. i’m an engineering student and currently doing my final year project. my project is the development of vehicle simulator for the training of drivers. among one of the element of my project is to display 3 camera’s ou… --- ## [What does the x and y value mean here? Can you show in a figure?](https://forum.kirupa.com/t/what-does-the-x-and-y-value-mean-here-can-you-show-in-a-figure/656395)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 4\ **Last updated:** [January 20, 2023, 9:05am UTC](https://forum.kirupa.com/t/what-does-the-x-and-y-value-mean-here-can-you-show-in-a-figure/656395 "2023-01-20T09:05:57Z")
function checkBoundaryCollision() { if (x - ballRadius \<= 0 || x + ballRadius \>= canvasWidth) { dx = -dx; } if (y - ballRadius \<= 0 || y + ballRadius \>= canvasHeight) { dy = -dy; } } Full code here: https://co… --- ## [diagram with div](https://forum.kirupa.com/t/diagram-with-div/656090)
**Author:** [@ivchenko505](https://forum.kirupa.com/u/ivchenko505)\ **Replies:** 2\ **Last updated:** [January 19, 2023, 11:04am UTC](https://forum.kirupa.com/t/diagram-with-div/656090 "2023-01-19T11:04:53Z")
Continuing the discussion from How to update the lines so that they do not break away from the rectangles after dragging?: \ \ \ \ \ **Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 3\ **Last updated:** [January 13, 2023, 2:15am UTC](https://forum.kirupa.com/t/how-do-i-move-the-ball-upwards-in-my-breakout-game/656252 "2023-01-13T02:15:35Z") This is the function for it. which isn’t working. let ballDirection = { x: 0, y: -1 } function moveBall() { const ball = document.getElementById("ball"); const ballRect = ball.getBoundingClientRect(); ballRect.x = b… --- ## [React: No Elements Displayed (Вопрос по Реакт)](https://forum.kirupa.com/t/react-no-elements-displayed/654387)
**Author:** [@forumf](https://forum.kirupa.com/u/forumf)\ **Replies:** 11\ **Last updated:** [January 10, 2023, 4:49am UTC](https://forum.kirupa.com/t/react-no-elements-displayed/654387 "2023-01-10T04:49:11Z")
Why does not display styles in the browser, also does not display elements. --- ## [How to update the lines so that they do not break away from the rectangles after dragging?](https://forum.kirupa.com/t/how-to-update-the-lines-so-that-they-do-not-break-away-from-the-rectangles-after-dragging/655984)
**Author:** [@ivchenko505](https://forum.kirupa.com/u/ivchenko505)\ **Replies:** 4\ **Last updated:** [January 6, 2023, 3:45am UTC](https://forum.kirupa.com/t/how-to-update-the-lines-so-that-they-do-not-break-away-from-the-rectangles-after-dragging/655984 "2023-01-06T03:45:09Z")
Hi!. I beg you to help me. I’m creating a small chart and it’s not working make the connecting lines between the rectangles so that they stretch after moving the rectangle-nodes. What we have: 3 rectangles created in… --- ## [How to give each letter a different color - Learning React?](https://forum.kirupa.com/t/how-to-give-each-letter-a-different-color-learning-react/655953)
**Author:** [@Ettenytten](https://forum.kirupa.com/u/Ettenytten)\ **Replies:** 1\ **Last updated:** [January 2, 2023, 9:34pm UTC](https://forum.kirupa.com/t/how-to-give-each-letter-a-different-color-learning-react/655953 "2023-01-02T21:34:02Z")
Help pls. I wanted to attain that results from the book Learning REACT as a beginner. And I follow all procedure from the book, but I didn’t manage to make the results that will create all the 5 letters to have different… --- ## [How to Make a "Typewriter Carriage"](https://forum.kirupa.com/t/how-to-make-a-typewriter-carriage/655829)
**Author:** [@Mercurio376](https://forum.kirupa.com/u/Mercurio376)\ **Replies:** 2\ **Last updated:** [December 29, 2022, 7:12pm UTC](https://forum.kirupa.com/t/how-to-make-a-typewriter-carriage/655829 "2022-12-29T19:12:48Z")
Hello friends! I’m just starting to learn JavaScript and I have a question. In C#, when you used Console.WriteLine, your string values were printed to a column. So, how to do something similar in JavaScript and is it po… --- ## [How does props program flow work in react js?](https://forum.kirupa.com/t/how-does-props-program-flow-work-in-react-js/655807)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 1\ **Last updated:** [December 29, 2022, 8:48am UTC](https://forum.kirupa.com/t/how-does-props-program-flow-work-in-react-js/655807 "2022-12-29T08:48:40Z")
App.js: import React from 'react' import Helloworld from './components/HelloWorld'; import Users from "./components/Users"; const App = () =\> { return ( \ \List of Users\ \ **Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 17\ **Last updated:** [December 27, 2022, 12:41am UTC](https://forum.kirupa.com/t/finished-learning-basics-of-html-and-css-want-to-do-some-projects-using-only-html-and-css/654968 "2022-12-27T00:41:33Z") Pardon me if this is not allowed here, you can remove this if this is not allowed. I’ve finished learning basics of HTML and CSS indvidually. I.e topic by topic w/o creating a project. If you want to know the topics th… --- ## [JS is blocked on a mobile version](https://forum.kirupa.com/t/js-is-blocked-on-a-mobile-version/654032)
**Author:** [@Helena\_G](https://forum.kirupa.com/u/Helena_G)\ **Replies:** 10\ **Last updated:** [December 26, 2022, 2:58pm UTC](https://forum.kirupa.com/t/js-is-blocked-on-a-mobile-version/654032 "2022-12-26T14:58:33Z")
Hello, Kirupa members. I need your help :slight\_smile: I’ve copied a part of a site which I’m creating to show you the issue. But, actually, I’ve realised that it works much better than on the main site. Regardless t… --- ## [When I try to make image transparent in navbar, navbar disappears, how to resolve this issue?](https://forum.kirupa.com/t/when-i-try-to-make-image-transparent-in-navbar-navbar-disappears-how-to-resolve-this-issue/655698)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 1\ **Last updated:** [December 23, 2022, 1:18pm UTC](https://forum.kirupa.com/t/when-i-try-to-make-image-transparent-in-navbar-navbar-disappears-how-to-resolve-this-issue/655698 "2022-12-23T13:18:09Z")
This is the website that I am trying to build. Below is what I’ve built so far. I’m using bootstrap. The navbar class is “navbar”. I put this into css: .navbar { opacity: 0.8; } But I’m not getting expected o… --- ## [How do promises program flow work in javascript?](https://forum.kirupa.com/t/how-do-promises-program-flow-work-in-javascript/655596)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 2\ **Last updated:** [December 20, 2022, 3:11am UTC](https://forum.kirupa.com/t/how-do-promises-program-flow-work-in-javascript/655596 "2022-12-20T03:11:18Z")
Promises syntax that I learnt: let p = new Promise(function (resolve, reject) { let x = 20, y = 20; if (x == y) { resolve(); } else { reject(); } }) p.then(function () { console.log("that's correct… --- ## [return (a % 2 == 0) in a filtering functions means?](https://forum.kirupa.com/t/return-a-2-0-in-a-filtering-functions-means/655563)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 5\ **Last updated:** [December 18, 2022, 10:46am UTC](https://forum.kirupa.com/t/return-a-2-0-in-a-filtering-functions-means/655563 "2022-12-18T10:46:16Z")
I’m doing this tutorial by kirupa: let numbers = \[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12\]; even\_numbers = numbers.filter(fxn); function fxn(a) { return (a % 2 == 0); } console.log(even\_numbers); In th… --- ## [What strings does this regex matches ? (a|b)\*](https://forum.kirupa.com/t/what-strings-does-this-regex-matches-a-b/655472)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 5\ **Last updated:** [December 14, 2022, 12:11pm UTC](https://forum.kirupa.com/t/what-strings-does-this-regex-matches-a-b/655472 "2022-12-14T12:11:45Z")
regepxal is showing infinite matches and shows “baaaaaaa” as a match. Doesn’t (a|b) means a or b? means match 0 or more times. So, it should be matching aa,aaa,bb,bbb, , etc? I’m not getting how baaaa is a match. Can … --- ## [I'm getting a simplified version of emojis](https://forum.kirupa.com/t/im-getting-a-simplified-version-of-emojis/653682)
**Author:** [@Aaron\_H](https://forum.kirupa.com/u/Aaron_H)\ **Replies:** 7\ **Last updated:** [December 9, 2022, 3:49am UTC](https://forum.kirupa.com/t/im-getting-a-simplified-version-of-emojis/653682 "2022-12-09T03:49:42Z")
My emojis are rendering flat when pasted into my code editor. Meaning that they lack gradients. I attached a screenshot. If I insert them through CSS they look fine. Thanks for the help! Below is the correct heart(CSS… --- ## [Need help with switching image files for a Flappy Bird type game](https://forum.kirupa.com/t/need-help-with-switching-image-files-for-a-flappy-bird-type-game/655133)
**Author:** [@AmiiboAmigos](https://forum.kirupa.com/u/AmiiboAmigos)\ **Replies:** 19\ **Last updated:** [December 7, 2022, 2:39am UTC](https://forum.kirupa.com/t/need-help-with-switching-image-files-for-a-flappy-bird-type-game/655133 "2022-12-07T02:39:06Z")
Hey peeps! Im working on this college project and I’m having trouble trying to switch between two different image files for a game. It’s supposed to switch between a Rocket (with flames) when clicking the accelerate bu… --- ## [Desiging an eCommerce Site](https://forum.kirupa.com/t/desiging-an-ecommerce-site/64131)
**Author:** [@SeiferTim](https://forum.kirupa.com/u/SeiferTim)\ **Replies:** 1\ **Last updated:** [September 13, 2004, 9:49pm UTC](https://forum.kirupa.com/t/desiging-an-ecommerce-site/64131 "2004-09-13T21:49:25Z")
I wasn't sure if this was the best place to put this, but we'll see if any Mods move it \[wink\] This is more of an insight-seeking question, as opposed to a "give me the right answer" question. I want to start buil… --- ## [Best course on bootstrap to learn bootstrap for someone who requires more mentoring?](https://forum.kirupa.com/t/best-course-on-bootstrap-to-learn-bootstrap-for-someone-who-requires-more-mentoring/655009)
**Author:** [@polaryeti](https://forum.kirupa.com/u/polaryeti)\ **Replies:** 10\ **Last updated:** [December 3, 2022, 5:58pm UTC](https://forum.kirupa.com/t/best-course-on-bootstrap-to-learn-bootstrap-for-someone-who-requires-more-mentoring/655009 "2022-12-03T17:58:30Z")
I’m struggling with frontend. Although my basics of html,css are clear, I’m having trouble in building websites and I’m just putting baby steps towards it(made my first simple html css site today). Thus a guidance from a… [Previous page](https://forum.kirupa.com/c/programming/web-dev/42.md?page=23) [Next page](https://forum.kirupa.com/c/programming/web-dev/42.md?page=25)