I have a react component that renders when i click on a menu option, this page has a form to complete and that’s done, onSubmit i want to redirect it to the component that the user clicked before. I tried to redirect it with Redirect and also using useHistory(), but none of them are working, this is wha…
Tag: reactjs
how to add and remove number without duplicate in the state object inside the array in Reactjs?
The below code which i’m using to add the data in the state the code is my State is Given Below im adding numeric value from 1 to 30 but when i try to add same number it adds to the array i should not add it again please give me solution Answer before updating the state perform an evaluation
Set autocomplete off for Formik field
To set the autocomplete off for a simple input it must be done like this: <input type=”text” autocomplete=”off”> In this case, there is a Formik Field and the input looks like this: and it seems that adding autocomplte=”off” doesn’t work in this case: Any ideas?…
Resolving an array or promises and getting the result
I’m attempting to map and format data to render it into a table. I have an array of promises that I’m attempting to resolve with Promise.all(). but it seems to not be returning the result of the promise. my code is as follows: my data copy variable only returns as : where the result is the correct…
ReactJS error when passing a function as a props
Recently I started to learn ReactJS with help of tutorials and I’ve run into an error I can’t find solution for by myself. One of the first projects I decided to do is To-do list and when trying to pass “handleChange” function as a prop to my component I get this error TypeError: Canno…
ReactJS – TypeError: Cannot read property ‘name’ of undefined but it is
I have a map function that is supposed to take the data from an list I’ve created and show it to the user but it give me a typerror whenever I try to do that, here’s my map function: And here’s the piece of code where I attach the items to the array: I get the following error: “TypeErr…
Are there any benefits to defining functions within React components?
I brought the code below for easy understanding. Note the location of the a function. There are declarative differences depending on where the a function is in React. Both are code that works correctly. Are there any benefits of defining them within React components? This is a shortened code that makes it eas…
ReactJs: Generate Random number to display in Material UI progress bar
I am trying to generate random number for test functionality to display in my Material UI Progress bar . This piece of JS code is working in JS fiddle. But I want to show this random number with my reactJs. Any help/suggestion how can I achieve this. //Testcode Answer Accessing dom elements directly is not a …
First zoom glitches after page load using D3
I’m using D3 to zoom onto an image on click and on Mousewheel. Everything is working fine but the first zoom glitches a lot. Here is the demo of the app. This is how I’m zooming towards the objects: This zoom doesn’t seem to be working here. But it does definitely work in the app. I’ve…
how to update the state before rendering the component?
I have this app that adds “persons” to a “phonebook”, and the user can update the person’s phone if the person already exists. but I want to know to handle the problem of when the person was already deleted (i open two tabs and delete a phone in one tab, and I try to “updat…