I am following the guide below to verify that only registered users can send requests to my backend nodejs server, my frontend is sending requests with an authorization header that contains a token and that part is working well. The nodejs backend should then check the token is valid before sending a response…
Tag: javascript
How to create a button to enable/disable zoom and pan for leaflet in javascript react?
As the title says, I’m searching how to create a button to enable/disable zoom and pan for leaflet in javascript react. Actually creating a button is fine, but getting the effect I want on my map is not. I am working on a react project and trying to implement a leaflet map that swiches between an “…
Why export default doesn’t work in this simple code?
Why when I use export default on index.js module it says: export ‘appReducers’ (imported as ‘appReducers’) was not found in ‘./reducers/index’ (possible exports: default), but when I change it to module.exports the error go away, why is that? At redux.js in index.js in app.…
What does it mean by “second += arr[i][arr.length-i-1]”
I been practicing my algorithm solving skill by solving HackerRank problems. However, one of the problems is giving me a difficult time to understand. It is about calculating absolute difference between sum of diagonals in a square matrix “arr”. If the square matrix is like this: and the solution …
How to access POST data in express js?
Im using (in the browser): on the client side browser. I’m using (node js): to get the post data. but it doesn’t matter what I send it doesn’t show up. I don’t wanna have to install some separate “body parser” package to see the data…. I don’t wanna parse it. A …
Controlled from in React
I’m new in react and I’m a bit confused about how React runs update on every new input’s keystroke, for exapmpe, this is the form and I want to update the state on every keystroke What I don’t understand here is the update cycle, my understanding is the following: As the input’s …
How can I make a style event with addEventListener to multiple Nodes
I am trying to set a style event for a multiple images tags and I can’t: the error is in the anonymous function of the event when I put into a loop to make the effect individually and for all galleries in the document with images[i]. Why ? : Uncaught TypeError: Cannot set property ‘style’ of…
charts.js displays only first x and y value from a json api response
I am trying to render a chart with charts.js with a json api but the rendered chart displays only the first x and y values from the json the json is fetched using xmlhttp json api link https://syed1ahmed.github.io/stage-gear/api.json Answer It seems that Chart.js does not recognize the thousands separators (,…
API returns undefined after 2nd round loop
I am getting PI number from PI Api (https://pi.delivery) and checking for palindromic of 21 numbers in sequence on each 105 numbers block (5 x 21) to be faster. My code returns undefined on the second round of for loop. Why is this happening? PS: This is a 105 numbers block and 2 rounds loop just for testing …
Unhandled Rejection: TypeError: Cannot read properties of undefined (reading ‘0’) getting error while trying to print JSON object in discord.js v14
I want to take the names from data.json and post it on a discord embed. For example I tried to print Animal Skull in a embed but it gave me that error. error test.js my data.json I would be really gratefull if anyone can help me. Answer You should use require to get data from json And your json contains