I have this piece of code: Im calling this function on this piece of code: The things is im getting: TypeError: Cannot read property ‘value’ of undefined It’s saying the problem is in this line: maxLevel: event.target.value. I dont get it, isnt the callback supposed to wait for the first set…
Tag: javascript
why is split returning empty strings even tho capturing parenthesis are not present?
My code: That outputs [“”, “a”, “”, “b”, “”]. Why are the empty strings present? Quoting https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split , If separator is a regular expression that contains capturing pare…
How to replicate jquery animation sequence in vanilla js/css
As the title says, I would like to replicate the animation bellow. the jquery API https://api.jquery.com/toggle/ decibels this default behavior as so: but I don’t understand how the transition works. I have tried changing the opacity, translating the element, ect, but obviously no luck. If it is impossi…
Django – AJAX Fetch sends request for each input letter
This might be far from how it should be done, I’m learning on the go and it’s my first time trying something like this. Problem: Even with the setTimeout function, server sends response for each letter I have written, though I would expect it to wait for user to stop typing and just fetch the fini…
With eslint-webpack-plugin@2.4.1, how do you use eslint’s cache?
After switching from eslint-loader, our initial watch builds have slowed down substantially due to the lack of caching. Is there a way to use eslint’s cache? Answer ESLint’s node api has cache and cacheLocation keys in it, and setting those like enables caching like eslint-webpack-loader’s o…
Why my data is flickering between previous and new when state is updated in ReactJS?
I’m working on a SPA with data fetch from the Star Wars API. In the characters tab of the project, the idea is to display the characters per page and you can click next or prev to go to page 2, 3, etc. That works, but! the character names flicker everytime the page changes, it doesn’t happen after…
How to exclude fields on return in mongoose
I have the following code: It works perfectly but say I want to exclude a field returned, like the __v field. I know I can do this by just creating an object like and etc. for teh other fields, however if I have 20 fields I don’t want to list every single one, so is there a way for mongoose
Making a Button that outputs a greeting
I’m kinda new to programming and need help with integrating javascript and html. I am trying to make an html page that has a name input section and a submit button to give a greeting from the function in a javascript file. I’ve tried using the form and input tags and was wondering how i output to …
BlockingResponse in Firefox extension
I’m attempting to redirect a user in a Firefox extension like so: I’ve added webRequest and webRequestBlocking permissions in the manifest. In the debugger, I see that I am reaching the return statement with the redirectUrl correctly set, but the webpage does not redirect. I would assume this shou…
Modify values inside a Javascript object
I have the following array if objects: Then i elaborate the following one: is it possible to change the value of ‘options’ array of the first one, according to the second set of options? i need to obtain something like: Answer i solved this way (locattributes is the first object, newopt the second…