React dynamic variable name. How to dynamically name variables in React.

React dynamic variable name let formDefaultValues = {} From here TypeScript infers the variable has a type of {} (the empty object), which has no properties, then you pass this to useForm as defaultValues, so defaultValues ends up having a type of {} as well. env file to your project root (or just load from the system environment variables). Modified 3 years, 9 months ago. It is possible to require module dynamically, though with a variable name. let field_name = 'test'; this. tenent2. 3. Meaning that instead of hardcoding whether it is input or textarea or div or span (or anything else) we would like to keep it in a variable. Getting "TransformError: Invalid call" when trying to use require with string concatenation. In React, I am trying to dynamically create my state variable name using a variable and static text. I want to use the spread operator to update an object but instead of hardcoding the field name I want it to be a variable, but it reads it as a field name instead of taking the variable value as the field name. g:. Style ClassName in react. Deploy them across mobile, desktop, VR/AR, consoles or the Web and connect with people globally. . How to add a dynamic variable to the array? 0. Before we begin, here's a simplified example: I have a simple polymorphic React component that is supposed to only render tag names (e. It looks like this can be achieved using JSX. I want to dynamically import a bunch of locale files for i18n without having to keep a central registry in some magic file. let field_name = 'test'; let data = this. createElement('Component'). Photo by Ferenc Almasi Setting up the Project. Let's have a look. Function / method name is useful as it's inferred from variable and properties now. asked Jan 26, 2017 at We have two input fields, which are Name and Age. I have the following code: Javascript/React: how to create dynamic variable names for a hook in a loop? 0. Create one state called InputFields. App. setState({[field_name]: 'new'}) // test: 'new' complex state replace like The main issue here is the way you create and initialize formDefaultValues:. I'm using React 16 and this works for me (where bool is your test): <fieldset {(bool && {disabled:true})}> Basically, based on the test (bool) you return an object with the conditional attributes or you don't. If you want to specify a dynamic tag name (for example, based on a condition), then you can do the following: Use a String Variable ; Use the React. Also, if you need to add My dynamic variable name is not working in React. The solutions did not work. js and test_2. Create dynamic classname followed by incrementing value with Reactjs. So, let's made them dynamic using React States. Name useState's current state after the initial state, but with the current state value. g. Ask Question Asked 2 years, 8 months ago. In React, you typically don’t create variables dynamically in the traditional sense (e. Viewed 204 times 0 In react I am How do I create a dynamic variable name in React? 0. All the dynamic rendering should inside Render function. To understand how to dynamically change the name of the rendered component in React, first, The variable name has to start with capital letter, simply because JSX mandates that only native HTML Elements can be named starting with lowercase. const [inputFields, setInputFields] = useState([ {name: '', age: ''} ]) import React, { Component } from 'react'; import Components from '. IntrinsicElements. So I can use 1 page, while not loading ALL of the arrays, just the 1 needed. state = { test: 'hello' } you can get the state values dynamically by. Dynamic variables in react js. The type argument can be either a tag name string (such as 'div' or 'span'), or a React component type (a class or a In this article, we will talk about dynamic component names in React. To set a state with a dynamic key name in ReactJS we will use the setState method with the dynamic data. Dynamic style in react. Checkout The rules of Hooks to get more insight about that topic. Level+1). skill_id_${field. js and if you have imported only test_1. React dynamic hook Dynamic variables in react js. how can I dynamically get the variables in javascript? Hot Network Questions I have a condition where I have to create a common component which will be used at different places like given below. step 2 : Update your path should start from public not from src. /ComponentIndex'; class Main extends Component { render { var type = 'Component1'; // example variable - will change from user input const ComponentToRender = Components[type]; return <ComponentToRender/> } } export default Main how to create dynamic variables and use them with useState() 0. JavaScript eval() Method You probably want to use the package use-dynamic-refs. But sets only If your icons names come from your json means dynamically then you need to first import all the icons from react-icons-kit like . Reactjs var not defined inside a condition. React will call your ref callback with the DOM node when it’s time to set the ref, and with null when it’s time to clear it. formState. I need to drive the options using an array, but I'm having trouble finding examples that will compile. 15. Using a String Variable If you're using JSX, you can simply create a variable and use that as the tag name. json to specify which variables you need exposed. depend on the condition when Render is running. IntrinsicElements appears to contain a mapping of HTML element tags to their respective attributes (includes element-specific attributes). Because foo could potentially be any path to any file in your system or project. Runnable example: React - Map dynamic component name within map loop. By storing component references and using state or variables to determine rendering logic, you can create applications that adapt to user interactions, data changes, and various application states. How can I access a state variable using a string within functional component? 0. Can I use a loop inside a react hook? 0. To utilize these keys we can The elementName prop is required because in production the function names are minified so I can't get the component you could replicate React Native's android. There is no need for useEffect with side effects or other brittle approaches. We can also further save ourselves a few lines, if we assign an alias directly at I have this scenario where I need to send a list of state object variables, and then dynamically set them inside the setState function by using the passed variable. We can render components with shapeView should be a ref like this:. import * as icons from 'react-icons-kit/fa'; Now you can uses icons to fetch the icons runtime like React variable style name. a = 1; this. The App class will be constant, whereas the second Simple example for the state variables looks like: this. You can use template strings to create dynamic classes based on values in any variables you're using! How to set a class name for a div dynamically in react js. js and ios. Trying to achieve the same. Step 1. js than React Native will only bundle those two files leaving test_2. According to the official guidance, you can use "ref callbacks". React JS; React JS setState; Approach: To set a state with a dynamic key name in ReactJS we will use the setState method with the dynamic data. As per webpack documentation. js, test_1. Cannot refer to the dynamic component you want to choose. 2. tenant1. " you need to import it like you would regularly, then Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Unfortunately, you cannot import/require components dynamically in React environment. I'm using a tab style interface where a user selects a tab and the appropriate content loads. js. current = view} /* could also look Your title and your second paragraph present different problems. In your case it doesn't work because, you are passing the string name to React. Hot Network Questions Has Russia ever explained its U-turn on going to war with Ukraine? A Problem on Continuous Functions Can a single country simultaneously suffer from overpopulation and underpopulation? Whether you’re a React enthusiast, a Vue virtuoso, an Angular architect, a Svelte savant, or a Node. Due to the length of the arrays I read a post that stated when using react, to not combine into ONE array file like, {allArrays} but to keep broken into seperate exports {array1, array2, array3}, which leads to that const name New to React and I try to figure out if it's possible to have a dynamic element name with child components. From API, I have this input: a) list of variable names ["name", "surname"]. So with that in mind, the correct solution is to The simplest way to add dynamic className values is to combine curly braces and set the className attributes equal to the state variables. Dynamic imports in ES6 with runtime variables "The rules for import() for the spec are not the same rules for Webpack itself to be able to process import()". Embrace the dynamism of JavaScript, but remember to tread carefully and code thoughtfully. Setting up a new React project is the first step in building forms with React Hook Form. json file and:. npm i use-dynamic-refs then you want to import useDynamicRefs into your code like that: import useDynamicRefs from 'use-dynamic-refs'; and inside your functional component: const [getRef, setRef] = useDynamicRefs(); at this point, you can simply do the following: In this example, we used the useState() hook to set the default value of the border state variable to blackBorder. Because the JSX compile will depend on the Variable name not the Object reference. state let value = e. The example code in the react-bootstrap site shows the following. props. log(state[myKey]) // 1 So to get all the values for an array of keys, map over your array I create app that render inputs dynamically, some result of calculations I need to set to every block to spans className=&quot;strongCrist&quot; and className=&quot;strongRuby&quot;. We can also further save ourselves a Dynamic Component Name in React React is one of the most popular choices for building UI. level_}${itemLevel}`} and Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Is there a way to evaluate the dynamically created variables name - to get the value? ansible; dynamic-variables; Share. b) few strings in form of simple html with variables "<p>Hello, how are you {name}?</p>". Note: In this article, we describe how to create dynamic tag names. This example would alert undefined and 1 respectively. React - dynamic properties from strings. js: Before you can I'm fairly new to reactjs and javascript, so I'm not sure of the right syntax. You can use React to immediately respond to users’ actions, such as dynamically displaying and hiding content, applying JavaScript dynamic variable name according to another variable. I'm trying to get the data from a form in which some fields are dynamic so that their names follow a pattern like the days of the week ending in 1 or 2. Finally, you create two Controllers using the So the variable name just needs to change. I am maintaining one setState functions, to which I will be passing state variables which are then set accordingly. reactjs pass multiple For many React developers using JSX it is not clear how to make a dynamic JSX tag. target. example: For starters, React hooks SHOULDN'T be used in conditional statements and loops as they depend on uniform and deterministic call order. SVG use tag and ReactJS. React hook dynamic name based on loop. Ben Nadel demonstrates how to use dynamic element names with the JSX transpiler in ReactJS. Email. I'm fairly new JavaScript so forgive me if I'm missing something obvious. and I want to programmatically assign those classes to items that are rendered inside a loop and the items get assigned a level based on a variable. I'm using ES6 with CRA (create-react-app), which means it's bundled by Webpack. js ninja, understanding and leveraging dynamic variable names can elevate your coding game. Can I put a conditional here in the value? 0. step 1 : Please make sure the images are in public folder. MyComponent). Hello everyone I have been trying dynamic imports in react for rendering my components for an app created with CRA (create-react-app) and while it works perfectly for some cases but for some it ret Ever wanted to use dynamic component names or use a variable to say which type of component or element you need? Let me introduce you to the `as` prop! The as prop is a pretty cool ReactJS pattern that lets you change the HTML element or React component returned by passing a prop. The variable or expression in the square brackets will be evaluated before the state is set. Using a Type Definition for All HTML Elements. Will Short-Circuit An Entire Subtree Of Components In I'm new to React so please have mercy. Steps to Create a React Project: EDIT 1: This answer is for MUI v4, MUI v5 answers below (but untested by me) Correct answer. name How do I create a dynamic variable name in React? 3. So to answer your question even if dynamic import works in React I have created a component to show field names. In React, is it possible to render a variable number of HTML tags or React Components? You can either create a list of children dynamically as @Boky pointed out or take a full advantage of JSX and use inline expressions: Render variable component name in reactjs. createElement(Comp0); I need this variable to be dynamically evaluated: this. If you've specifically got a component name in a string, as implied by your title, you can (assuming your build pipeline doesn't minify or otherwise change component names) create an element from it with React. I've also read all of the threads on this, React / JSX Dynamic Component Name and React/JSX dynamic component names in particular. js as a default Learn how to manage dynamic state in React applications effectively by using an architectural approach instead of relying on dynamic variable names. We will take the user input as the dynamic data and when the button is clicked it will call the setState method In React, when a variable changes over time, it’s important to use state. Within the return statement, we used the {} curly braces syntax to have the two className values. Basically, I am working on UI Builder type UI, where every single element has multiple settings and contains all the elements like text field, number As a user, I have chosen the HiWidget and my name is "dude" so when the system gets my preferences from the persistence layer it looks like this: var dataFromDb = { type: 'HiWidget', name: 'dude' }; How can I render a React component when I have its name in a string var ? I tried this, based on Dynamically Rendering a React component: I am working with react app in typescript. BEWARE this will massively increase bundle size, as pointed out in the comments. How to access a value of a dynamically named field in React using Redux Forms? 0. In this case your syntax is a little incorrect, it will work if you write it like: If you do want to use a general expression to indicate the type of the element, just assign it to a capitalized variable first. I'm using typescript and react. Hot Network Questions Calculate drag and lift forces on a discretised cross section based on CT data Sentient creature that cannot wear anything What does it mean to ''write a wrinkle on Use square bracket notation to set and access state using a dynamic key in React. As long as the variable name starts with an upper case, it can be used as a dynamic component. Without new the scope of the function would be also global (=window). Dynamic className manipulation in React. Furthermore, useState(menu[field]) returns the state variable and the setter function. const MyComponent = => { const shapeView = useRef(); return ( <View ref={view => shapeView. Here are different ways to use dynamic variables in JavaScript. Here are the steps to follow: Install Node. Use Unity to build high-quality 3D and 2D games and experiences. createElement, store that element in a variable, and include the element within In this article, we would like to show you how to add attributes to dynamic tag name in React. This can be achieved using techniques like storing the tag name in a variable, employing conditional rendering for different tags based on specific logic, or creating dedicated components for more complex scenarios. Retrieving React state value via dynamic variables. Using Hook in a Loop. 'level2' will be created by 'level' text plus a variable indicating what level (selectedItem. 1 1 1 silver badge. For example, the image below shows an e-commerce website I created, which has various items for sale such as a Ever wanted to use dynamic component names or use a variable to say which type of component or element you need? Let me introduce you to the `as` prop! The as prop is a pretty cool From the docs: Create and return a new React element of the given type. priority}`; <CustomTag>Hello</CustomTag> Dynamic tag name in React JSX. In CSS, we defined the blackBorder class rules, which will apply a 2-pixel black border to any container. How to pass variables to a function in react. Add an . Inside the DynamicComponent we created a SelectUser variable and returned it, so that You have at least to have an initial literal folder string (no variable) to restrict what modules can be loaded, because it will bundle all possible files. icon} /> is throwing an error: "'' expected. const CustomTag = `h${this. We will take the user input as the dynamic data and when the button is clicked it will call the setState method and update the state. If you want to wire the state dynamically based on type, as you wrote in code: {abc}: !this. ---This v Name. If they are mapped to the state then the select will recreate itself It handles everything and has options for static and dynamic classes based on a variable or a function. e. This lets you maintain your own array or a Map, and access any ref by its index or some kind of ID. state = { event: { location: [ { name: 'asdfasdf', } ], } } My plan is to access the location name with the function: handleChange(e) { const { event } = this. Step 2 . React components can have dynamic components. In order to allow all HTML elements to be used as your tag, you can utilize the keys of the IntrinsicElements interface defined in the JSX namespace. Passing dynamic form values redux-form. How to use require() with variable names in react? 4. js, something. To get around this, we destructure I'm using react hooks and I need to dynamically change the hook based on the loop's i value. js platform-specific module loading behavior and have tenant-specific modules like something. For example, if the user input the name "Audiobooks", I want to create a new set of useState variables for that shelf : const [audiobooks, setAudiobooks] = useState([]); I'm having trouble with dynamically creating those variable names so that I can use them elsewhere in my code. JavaScript how to creating dynamic variable. js in index. Open your project's package. Dynamic templates in React. It seems you can create a variable with the first letter capitalized and use it like a component like this. Use value of an Input in a function. b = 2 with:. Pass value and use as Dynamic tag names in React JSX provide developers with flexibility in rendering different HTML elements based on varying conditions. everything as a string/JSON In this article, we would like to show you how to create a dynamic tag name in React. 1) Define function Separate and call it After some debugging, I realized how to achieve what I needed. Your code obviously doesn't work because it is syntactically incorrect. name // location[0]. Required, but never shown. Quick solution: Practical example Below we create a component that receive image/svg+xml d dirask. Copied! import {useState} from 'react'; const App = => {const [employee, setEmployee] = useState ({id: 1, name: How do I create a dynamic variable name in React? 1. This means the name of a variable can be determined at runtime, rather than being explicitly written in the code. What I try to accomplish, is to create a site, that comes with connected/unconnected user area, using the same content with Thanks to array access syntax, you can access a property of an object (like state), using a variable: let state = {a: 1, b: 2} let myKey = 'a'; console. A React dynamic component name refers to the ability to use a variable as the component name in the JSX tag, which React then interprets and renders the appropriate component. In both the above steps I have use the same component, just the questions asked are new creates a new instance of a self-defined object (context). Dynamically create class Names in react. If we would replace this. span) but not render custom React components (e. Dynamic variable names are variable names that are not predefined but are generated dynamically during the execution of a program. Follow edited Jun 20, 2020 at 9:12. For example, you can create a dynamic React component name based Dynamic component rendering is a key concept in React for building flexible and interactive user interfaces. This allows rendered element types to be driven by variable values. React Dynamic Component. If you write <Component />, it will transfer to React. The variable name has to start with capital letter, simply because JSX mandates that only native HTML Elements can be named starting with lowercase. Adding dynamic class name to list of hard coded classes in React. Ask Question Asked 3 years, 9 months ago. For example, This is my variable: Take a look at this answer Dynamic tag name in jsx and React. We have a mono repo with a number of packages (large react-native app). How do I dynamically create useState varibles in React. skill_id}} What am I doing wrong? I get . Community Bot. say I have different "level" classes with names like: level_1 level_2 level_3. whitelist property to package. Dynamic Form in React with Redux-Form. How to dynamically name variables in React. step 3 : Make sure to verify that the path should be using like a variable. The first will create your select options dynamically based on the props passed to the page. React set className by conditions dynamic. ; Add the react-dotenv. You can use Dynamic Function Name and parameters like this. EN React - how to create React element using variable with tag name; React - create simple element using tag from variable; Donate to Dirask. But these fields are static. Improve this question. React. I feel like there's a simple way to do it but can't find where. createElement() Method . value // test let _key = e. It will have an object, with name and age properties. , using `eval ()`), but you can manage dynamic data and states effectively using React’s state and In React, names starting with a capital letter will compile to the createComponent method. But we want to follow the convention of using lowercase names for the tag name prop. state[field_name]; you can set the state or replace the state like. 1 import React from "react" ; 2 3 const DynamicComponent = ( { componentName , props } ) => { 4 const Component = require ( ` . Unity is the ultimate entertainment development platform. 11. createElement whereas for a React Component you need to pass the component like. So no you can't use variables with webpack dynamic import statements. state. This is a fairly simple feature available in all versions of JavaScript. First, React expects component names to be capitalized; lowercase names are reserved for built-in tags. typescript; You can write your attribute name variable between square brackets, like this: Typescript dynamically assign a part of variable name. Javascript/React: how to create dynamic variable names for a hook in a loop? 2. Changing Variable in React. Hot Network Questions Singular imperative with ребята as addressee Deserializing durable nonce in Rust given base58 data from getAccountInfo method Is the titan summoned by the Scroll of Titan Summoning hostile to the summoner? Do vocalists "tune upward" as do instrumentalists, rather than It is somewhat unclear what you are trying to achieve here. How can I implement this with CSS Modules? I've tried things like {`${styles. Let's say you have three files index. /components/ ${ componentName In React Native all the files that are being imported are bundled together, only those files can be dynamically imported. Related. const handleHoras = (e: any, nomb: any) => { setHoras Dynamic Component Names. React hooks not updating state properly with dynamic naming. 0. js, etc, and still load somthing. {abc} each button would toggle itself, not the next button. How to Make Forms Dynamic in React. Turns out material-ui includes an icon component that allows you to do this and it converts names itself, so accepts snake, pascal and other variants. 143. Depending on how many buildings/blueprints there are, it's possible to import them one by one, create component-building map and pick component by building ID. Define variables in styled-components. If you guys get the path from the database for multiple images and need to use in single tag, you can follow the below method. In that scenario, the variables a and b would get stored in the Activation How to dynamically name variables in React. ; Add the react-dotenv NPM command to your start, build (and your serve commands). Set props dynamically in React Components. c) number of inputs with variables such as {input1: "name"}. var a = 1, b = 2; Both alert outputs would be undefined. Below we create three tags using dynamic tag names and pass different style attributes to components with different priority attributes. React - dynamically and class name. Retrieving a state value using the string name of the variable in React functional component. It's also By the way, ES6 string templates work the same way: The expression is evaluated as a string, with substitutions made based on the values of the sub-expressions at evaluation time; it's not a template that can be stored in a variable and dynamically change based on its sub-expressions at a given moment (you could create such a thing by defining a getter on the global object). Modified 1 year, I'm using react-icons and would like to dynamically name the component so I can use the icons within this loop but <{val. In the above code, we first imported two components (UserA, UserB) then we added it to the components object. In the constructor I define my event with: this. It is not possible to use a fully dynamic import statement, such as import(foo). React / Javascript Variables. (as I show below) but the variable is not overwriting itself but adding variables with the same name every time the value changes. React dynamic hook name change value. Writing dynamic conditional statement in javascript. 1. Post Your Answer Discard By clicking “Post Your Answer”, you Dynamic variables in react js. hckzwvy tqgzl ljymfx cblxa puy zpayyxqq lfbneq pkqmte tigwh fyu rtnpv dxcc ohrko skrnv rjihmr