I am building a video game where fireballs drop from the top screen. The spaceship, moved by controllers, must avoid those fireballs in order win. My issue is that I do not know how to detect when the spaceship collides into fireballs. However, I found this link: Detect if animated object touched another obje…
Tag: javascript
D3 Stacked Bar Chart: Bars Overlap
I’m building an interactive bar chart with D3 (version 4). Users may choose a single category (this works fine as coded below) or they can view all categories, in which case the color-coded bars should be stacked. The issue is that I’m not sure how to manipulate the y-coordinates so that each bar …
Why do these sinon stubs resolve to undefined?
I’ve written a unit test for the following code and stubbed the browser methods (read: web-extension API) using Sinon (more specifically: sinon-chrome, a dated but still functioning library for my use case). The unit test: The tests fail due to both the stubbed methods returning undefined, but the Sinon…
I am trying to generate random color codes using JavaScript
I am trying to generate random color codes or one base colour-based codes. I am not much familiar with JavaScript & coloring What I have gathered so far: Thanks Answer If i understood you correctly. Try below function. It returns you the collection of colors if you pass anything and random. But if you pas…
Google Cloud Function async with multiple fetch requests
I’m new to both GCF and Javascript async and have been struggling with this. I perform a fetch call initially and then pass that response as a parameter to a second function which then also performs a separate fetch call. During the second function, my empty initialized json gets properties added to it,…
How can I redirect from one HTML file to another using javascript (the files are local)?
index.html file path: /Users/nixon/Documents/Website Development/Pers Website/index.html loginpage.html path: /Users/nixon/Documents/Website Development/Pers Website/loginpage.html —UPDATE AS OF 08/08/2020— Tried updating the code to this and it still didn’t work. HTML: JS: No errors in cons…
find outwhich link on another page was clicked to get to current page?
Assuming I have two html pages. Let’s assume foo.html and bar.html. foo.html is linked twice to bar.html. One from a picture and the other from text content. If a user now clicks on one of the two links on the first page (foo.html) and thus gets to bar.html, can you find out in bar.html which link the u…
TypeError: Cannot read property ‘handleChange’ of undefined
I am trying to build a todo list app with React. Getting the error “Cannot read property of handleChange undefined”. Below is the code i am working on. Moreover, todosData is an array of objects having id, text and completed(boolean – true/false) as properties. The content.js is as follows, …
Issues dynamically creating buttons with jQuery
I’m attempting to dynamically add operator buttons to my calculator however I’m just not having any luck. I’ve created functions to dynamically create the number and operator buttons. The numbers have been created successfully but once I try to add in the operators, nothing happens. I’…
how to avoid “undefined” appearing in a string when a string is not defined- Javascript
I have 3 variables which are dynamic and might be null or undefined. Example: and now I’m concatenating these string together to form a query in my searchlist: this results fine, however in any case when one of the str value is null or empty, I get this whe I concatenate these string: How can I avoid th…