So I have a fragment factory being passed into a Display component. The fragments have input elements. Inside Display I have an onChange handler that takes the value of the inputs and stores it in contentData[e.target.id]. This works, but switching which fragment is displayed erases their values and I’d…
Tag: reactjs
Jest tests keep failing for React component that renders various HTML elements based on type by using switch statement
I have a React Component that takes an array and iterates over each node, styling and rendering HTML elements based on the types found within the array. I have everything running properly and now I’m trying to write a test using Jest to check that: The component doesn’t render anything when it rec…
Warning: Failed prop type: The prop `history` is marked as required in `Router`, but its value is `undefined`. react-router-dom v^5.2.0
Running into this react router error and am confused because I’ve set up multiple react apps like this and have never had an issue. I ran npm update and am still having issues. It seems other people had this issue but that was with previous versions. Thanks in advance for the help! index.js App.jsx Erro…
Expected corresponding JSX closing tag for (16:12)
So I get Expected corresponding JSX closing tag for <Navbar.Collapse> (16:12) error, It says there is no closing tag for <Navbar.Collapse> but there is, here is my code Full error Answer the </Navbar.Collapse> needs to be before the </container> tag
Cannot destructure an object
I fetched and object which contains two properties, one is a number and one is an array. So I right away accessed the array and then assigned to a state and then passed each item to another component through context api. And it does not working. Here is my code: In this code ‘correct_answer’ is a …
How do I extract messages from multiple specific folders with FormatJS CLI?
I have /components/foo.js and /pages/bar.js, both are using <FormattedMessage /> with a different defaultMessage: If I run formatjs extract ‘components/**/*.js’ –out-file lang/en.json I only get messages from my components folder. If instead I use the path pages/**/*.js, I only get mes…
How can I remove occurrences with random hash?
I have a controlled <input /> in my React application where the user would type. I want to keep track on it and replace the occurrences of $.text and $.lang to random hashes/number. from I want all occurrences of $.text and $.lang to have a random number(or anything unique): to What I have done so far T…
VSCode auto import – how to force Material-UI full path import
When using VSCode’s auto import feature to import Material-UI components, it will use a named import to import from the top-level file: However, I would like the auto import to use the full path import instead: I’ve tried to find a way to configure VSCode’s auto import to do this to no avail…
Trying to build React Component that can iterate over a nested data structure and produce styled HTML elements based on type
I have a nested data structure I’m getting back from an API that contains sections of text as objects inside of an array. I’m trying to iterate over the initial array of sections, check to see what type the section is, and then based on the type iterate over the copy array to style and render each…
I try to validate a textbox that it should not allow any string
I am trying to validate a textbox that the user should type only numbers in the textbox. Here is my code https://codesandbox.io/s/kind-moon-x6il3?file=/src/App.js:0-513 If we start with the string it is not validating, it is allowing you to type the strings. If we start with numbers, it is working fine. If I …