Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago. Improve this question currently have this code activated by a html button: i wanna send the valu…
react context provider return undefine as component
this the first time to me with context in Reactjs and have this problem Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it’s defined in, or you might ha…
How to add Datatables Custom row rendering / aggregates
I’m trying to add a custom row to a serverside rendered data table, inorder to show the total amount of a column the following is how the table headers are Date | Name | Amount | Ref | to get the data using AJAX I need help to append a row to the table and Add the Sum total of
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I have a table where each row corresponds to an event. Each event has a set of timeslots rendered as span elements and each timeslot is assigned the na class (with v-bind) only when its stopsales property is true The timeslots are fetched asynchronously from an ajax request (loadData). I call loadData to rend…
Clipping Mask Ignores Opacity of Elements
I want to create a grid array of objects. And I want them to clip with the clipping mask. At the same time, all the objects in the grid should have different opacity. Example in the Sketch. At line 23, I set a random opacity, but when applying the mask this information will be ignored and filled with the mask
React routing to endpoint but not rendering content
I can route to another endpoint, but the component content only appears on manual refresh. I’ve seen this question asked here, here, and I’ve been checking out the reactrouter docs, amongst others. The solution always seems to be “add withRouter” or “make sure you’re wrappi…
How to use the result of an iteration to re-iterate?
I need to create a new array from another with the condition: for example from an array I need to make an array [‘1′,’2′,’148′,’151’] which means the path from “parentId”‘s to “id”:152 – (argument for this function). I think m…
Insert HTML code to div onClick but does not replace existing code
I would like to insert HTML code to make a “list”. I’ve seen examples of innerHTML but that just replaces the existing code. How can I add more code without replacing the current code? Answer Use insertAdjacentHtml. Docs – https://developer.mozilla.org/en-US/docs/Web/API/Element/insert…
How do I properly use useSelector + createSelector (from ‘reselect’) in React app?
I am using reselect lib in my React project. Here is a code: Code for selector: As I mentioned in the App’s code, first commented line (where I destructure the object) works good: I’m fetching tickets from the server, put them in redux state, get them in App’s component and render them. But …
SyntaxError: Unexpected token ‘<' on shallow render with Enzyme and Jest in React
I am running tests with jest and enzyme in my React application, and while my simple sanity check test (2+2 expect 4) works, this error is thrown when I go to shallow render a component. It also throws when I try to replace shallow() with render() Here is the app.test.js file: babel.config.js: EDIT : I added …