I have a simple Chrome extension that adds a browser action. When the extension’s popup is opened, it needs to access the current tab’s URL. Since it doesn’t need access to all the tabs, I just have the activeTab permission specified in the manifest: In theory, that should give the popup acc…
Tag: javascript
Mongoose JS findOne always returns null
I’ve been fighting with trying to get Mongoose to return data from my local MongoDB instance; I can run the same command in the MongoDB shell and I get results back. I have found a post on stackoverflow that talks about the exact problem I’m having here; I’ve followed the answers on this pos…
React form onChange->setState one step behind
I encountered this problem building a webapp and I replicated it in this jsfiddle. Essentially, I would like an input to call this.setState({message: input_val}) every time I type something into it, then pass it into the parent App class which then re-renders the message onto the Message class. However the ou…
Multiselect options with each option selecting multiple times using jquery
Select numbers (you can select each number any number of times): what I’ve tried in jquery is this…. Now, What i am trying to do is, if i select a number from the options, it should display in the ‘div’ and if i select another number or the same number again, it should display beside t…
jsdoc: multiline description @property
I am documenting my code using jsdoc, so far so good, I have a comment like below and it comes in html document like I want it to appear something like hope I am making myself clear… Answer You have to use br-Tags to resolve new new lines:
Shorten ObjectId in node.js and mongoose
my URLs look like this at the moment: So, as you can see, it gets pretty long, pretty fast. I was thinking about shortening these ObjectIds. Idea is that I should add new field called “shortId” to every model in my database. So instead of having: we would have this: I found a way to do it like thi…
Transforming a Javascript iterable into an array
I’m trying to use the new Map object from Javascript EC6, since it’s already supported in the latest Firefox and Chrome versions. But I’m finding it very limited in “functional” programming, because it lacks classic map, filter etc. methods that would work nicely with a [key, val…
How do you properly return multiple values from a Promise?
I’ve recently run into a certain situation a couple of times, which I didn’t know how to solve properly. Assume the following code: Now a situation might arise where I would want to have access to amazingData in afterSomethingElse. One obvious solution would be to return an array or a hash from af…
How to disable scroll on HTML5 date inputs having a webshim fallback in
I’m trying without success to disable scroll on an HTML5 date input. This input has a webshim fallback, which cause my JS to works with Chrome, but not Firefox. Does anyone ever faced this issue? Answer I had the opportunity to discuss of this problem with webshim’s author, and it was found that a…
How to get a number value from an input field?
I have some issues with calculating some stuff with JS and getting the right values out of the input fields (number). When I use this code it doesn’t show anything. So what is wrong with my JS? Do I need to include a jQuery file? Answer You had some mistakes in your HTML, but here is a working JSFiddle:…