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Tag: reactjs

show 2 items per row[react native]

I am learning react native and in all the tutorials i see ListView has been used with only 1 items per row. I have not used ListView, though. I have only 6 items that has to be shown as flat grid with 2 items per row and should be responsive. I know its a basic question, but i have tried

Use reselect selector with parameters

How do I pass additional parameters to combined selectors? I am trying to • Get data • Filter data • Add custom value to my data set / group data by myValue console.log(myValue) returns undefined Answer Updated: 16 February 2022 New Solution from Reselect 4.1: See detail Updated: 6 March 2021 Solution from Re…

getElementById in React

Getting this error at the moment: Uncaught TypeError: Cannot read property ‘value’ of null I call this in my render function below: I also have tried calling it in here How can I get the id of an input text field and read that value and ensure it is not null? I think the DOM is loading after I try

How to import .js file inside my .tsx file

I am having an issue where webpack is telling me: ERROR in ./app/app.tsx (4,25): error TS2307: Cannot find module ‘./sample-data’. My imports look like this: And lastly this is my sample-data.js file that I am trying to import: If I change it to sample-data.ts I get told that it isn’t a modu…

How to render HTML string as real HTML?

Here’s what I tried and how it goes wrong. This works: This doesn’t: The description property is just a normal string of HTML content. However it’s rendered as a string, not as HTML for some reason. Any suggestions? Answer Check if the text you’re trying to append to the node is not es…

Import JSON file in React

I’m new to React and I’m trying to import a JSON DATA variable from an external file. I’m getting the following error: Cannot find module “./customData.json” Could some one help me? It works if I have my DATA variable in index.js but not when it’s in an external JSON file. …

Arrow function without curly braces

I’m new to both ES6 and React and I keep seeing arrow functions. Why is it that some arrow functions use curly braces after the fat arrow and some use parentheses? For example: vs. Answer The parenthesis are returning a single value, the curly braces are executing multiple lines of code. Your example lo…

Concatenating variables and strings in React

Is there a way to incorporate React’s curly brace notation and an href tag? Say we have the following value in the state: and the following HTML attributes on a tag: Is there a way I can add the id state to the HTML attribute to get something like this: Which will yield: Answer You’re almost corre…

JSX with a HTML tag from a variable

I have a React component defined in JSX which returns a cell using either td or th, e.g.: Would it be possible to write the JSX in such a way that the HTML tag is taken from a variable? Like: The above code returns an error: “unexpected token” pointing at {. I am using Webpack with the Babel plugi…