I gave my HTML codes on the top. JS Codes are on the down: In this case, When I hover over the cardBody element, the output must write “mouseenter”. And when I leave with the mouse, the output must “mouseover”. However, I get an error Uncaught TypeError: Cannot read property ‘addEventListener’ of undefined. I searched everywhere about this problem, but
Tag: dom-events
Remove hover effects when scrolling
I have been working on an application. There are multiple components on the page. The content inside them is scrollable. The expected functionality is when I scroll inside the component the hover effects on different elements should be disabled. After searching in the internet I have a working solution. I have created a HoverDisabler component like this, The css for
Flask onchange event or need Javascript framework?
I used to build Microsoft Excel apps using VBA, and events like _Change, _Click,… I first switched to JavaScript and frameworks but I got lost with the asynchronous side. So I moved to Python and Flask, and I like it so much. But when I do frontend, it is hard to build dynamic forms because I dod’nt find nativelly my
Call a function “dynamically” in JS with something like
I’m trying to learn how to dynamically create objects and apply functions to them with JS and HTML. How can I use a <select> dropdown’s text/value to call a function on an object as directly as possible? In the past I’ve used functions in an array, if then statement, or conditional chain but this seems like extra work. I’m open
Add Event Listener not Connecting to Button
I am trying to click a button, that will then change the display of overlay on my page to none. In the console it is telling me that, startButton.addEventListener is not a function. Can someone help me find the bug? Answer Get your button with getElementById, it works
Vue.js working with input from a barcode scanner
I’ve stumbled upon an interesting case in a web-module, designed for both user- and machine-input (via a barcode scanner). Here is the code from Vue’s module: The scanner can trigger keyup.enter at the end, but it inputs the barcode so fast, that the model does not update. Only by adding 10 ms delay after the input (custom setting in the
Can I use function generator as event handler?
I have a list of HTMLCollection: And I have a script of JS: My goal is to write a keyboardEvent based on .addEventListener(“keydown”, generatorFunction) method whereby event handler would be presented as function generator i.e. generatorFunction presented above. Is it good or bad practice? Answer Using a generator function directly as an event callback wouldn’t make any sense because calling
Bootstrap button plugin conflicting with Vue checkbox click event
When I add bootstrap.min.js to my Vue application my checkboxes @click event is not being initiated. More specifically when using bootstrap’s button-group with data-toggle=”buttons” If I remove bootstrap.min.js then the checkbox click event works as normal. What is causing this? Link to Codepen https://codepen.io/ben_jammin/pen/gNPVvw?editors=1000 https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/js/bootstrap.min.js Bootstrap Button plugin https://getbootstrap.com/docs/4.3/components/buttons/#button-plugin Answer Vue and Jquery are not meant to be together and
Detect an URL change in a SPA
I would like to listen to path changes in a SPA which is not maintained by me. I found one solution here: https://stackoverflow.com/a/44819548/7042552 But still, it seems kind of “hacky” to me – but still my implementation is like this: Is there a better or more generic way to listen for page loads in a SPA? Answer This https://stackoverflow.com/a/41825103/7042552 did
Using JavaScript Onclick Event to pass Data to views.py in Django?
I Have a bit of idea about this to use ajax with the JavaScript to send data to views.py but I am not able to do that. So what I am trying to do is I have put onclick event on the image so by clicking on that image I should be able to send some value to views.py. This