for the life of me I can’t figure out what is happening. I’ve been spending all day searching for the answer but can’t find it anywhere. I’m practicing with writing a function that emails an abandoned form to me. This is the index.js file I run for the local host that hosts the form Th…
Tag: javascript
Sqlite .all() function returns an undefined promise. How can I use the result further?
I am just starting to work with JS and SQLite. And could not find any help for my specific question. I want to keep a return to use it as a foreign key in a second table. This is my function: What do I have to do so that promise does not stay undefined outside of the function? Rest of
Why use refs in react? What is the use cases for it?
This question exists but it didn’t give a lot of data or real world explanation: What are Refs in React or React-Native and what is the importance of using them Let’s say i want to integrate to 3rd party library how ref is going to help me? Answer Some 3rd party libraries expose methods to interac…
Validating JWT Token in vue.js Router
I am using the following code to generate a JWT token: Once generated, I send the token to the client, which stores it within a cookie: Furthermore, I am using vue.js Router for my navigation. From my understanding, if one adds the following code in the router file, one can insert middle-ware in order to prot…
Awaiting till user finishes writing to input field in Vue.js
I have a QR code creating page. I want my QR codes to be created dynamically by user input. But I don’t want to instantly create a QR code. I want to wait my user to finish writing then after one second i will generate the QR code. So I have a template like below: And my script: Apparently the
TextField Style using styed-components and Material-UI withStyles
Here is Material-UI TextField style using withStyles from Material-UI itself: and it works perfectly. Is there any way to make the same style using styled-components? I tried this: but it is not making the same style. I might be missing some extra syntax, any help appreciated! Answer Below is an example showi…
Disable duplicate declaration validation in Acorn
I’m using Acorn to parse some syntactically valid JavaScript code into an ESTree for further processing. It appears that Acorn does some semantic checks too – in particular it throws an error for duplicate declarations. For example, parsing the following code throws an error of Identifier ‘f…
Why DOMContentLoaded handler can block first paint?
There is a similar question that wasn’t resolved. I’ve encountered a situation when handler that listens to DOMContentLoaded can block first paint. Sometimes it blocks, sometimes it doesn’t I tried many times cmd + R to see it. Is there any explanation to this behaviuor? Also I recordered a …
How to reset the cornerstone viewport when new image is loaded
I am trying to make a Dicom viewer app in react using Cornerstone.js library. I have two components in my react app. One is ImagePreview and the other is CornerStoneElement. CornerStoneElement is where I initialize the cornerstone library and it loads the current image in its state. When a new image is pushed…
Creating unique key props for array children (React.js)
I am trying to build out a component in React which takes information from a JSON source, and uses some of that information to create states which can be passed down into other separate components. While I haven’t passed my states into separate components yet, I have been able to get my state to update …