I’m trying to write a response interceptor for my React project but I am having some issues. When a user gets a 401 from their original request I want to try and refresh the token and continue, but if the user gets a 401 from their original request and when trying to refresh the token it fails then redi…
Tag: reactjs
Preventing “not wrapped in act(…)” Jest warning when state update doesn’t affect UI
I’m trying to figure out if there is a way to prevent the “not wrapped in act(…)” warning thrown by Jest/testing-library when I have nothing to assert after the state update that causes the warning happens, or if I should just ignore this warning. Suppose I have this simple component: …
TypeError: Cannot read property ‘state’ of undefined (Giving props through link)
I can’t retrieve the props gived on the Link attribute. Here is the code of my Link class component : And i’m trying to retrieve the props in the Redirect page like that : But React is giving me an error.. : “TypeError: Cannot read property ‘state’ of undefined” So how can …
React run javascript code after all render is completed in function based component
I had a form component with the following content I wanted to focus the text element after the component gets rendered. I was first trying to put {document.querySelector(“#txt-in”).focus()}, it didn’t work and after searching I found I could use the tag autoFocus. and everything would work b…
react-redux: actions do not change the store
I’m building a react app with redux and I have a problem. I have a component connected to the redux store and even though I dispatch actions those actions are not received from the reducer thus the state won’t change. Here’s the code of the component: Here’s the filters.js file in the …
Change color of dropdown item in React with color picker
I have a react color picker that I am using to create a custom 16 color gradient. I use a dropdown to select the color I want to edit and then use the color picker to pick the color. This edits an array that is called to style each box of the dropdown. My end goal is to change the
Insert object if key doesn’t exist
I’m using recharts to add a new line to a chart where the key value of the object equals to a key value from another object. It works fine when it finds the key but the script doesn’t insert a new object if the key value is not found. I have this array of objects in the state And this
React-Apexcharts how to step through the x-axis within a range
Im new to Apexcharts, and Im working on implementing a line chart. I have encountered a question about the x-axis of the chart while I am trying to apply an array with a long length(as big as an array of length greater than 500). The x-axis’s unit is based on time in the format of “mm:ss”, t…
How to avoid TypeError: Cannot read property ‘charAt’ of undefined when the json input is not available?
I have an avatar that shows the first letter of the user’s first name. The list of user name comes when the API call. If the API call not happened TypeError: Cannot read property ‘charAt’ of undefined error coming as there is no in put json. My react code as follows. Answer User can still be…
React App – My alert window is showing up twice
I don’t understand why this is happening – I have an app that increments and decrements a counter when the buttons are pressed to display an increasing list of easter egg brands from a collection. When the counter reaches the max number of eggs in the collection I want a popup to appear saying …