Get textarea character count using reactjs with help of usestate hook

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I am new to reactjs i have tried to get textarea character count, It's need to display while user typing in textarea but not able to get count also throw state object is readonly error. My code is

import React from "react";

export default function FullWidthTabs() {
  const [textAreaCount = 0, textAreaTotal = 250] = React.useState(0);

  const recalculate = e => {
    console.log("event value:", e);
    textAreaCount = e.target.value.length;
  };
  return (
    <textarea
      type="text"
      rows={5}
      className="full_height_Width"
      onChange={recalculate}
    />
  );
}

Here expected output need to update character count like

import React from "react";
import "./styles.css";

export default function App() {
  const [count, setCount] = React.useState(0);
  return (
    <div>
      <textarea
        type="text"
        rows={5}
        className="full_height_Width"
        onChange={e => setCount(e.target.value.length)}
      />
      <p>{count}</p>
    </div>
  );
}

CodeSandBox

LimitedTextarea, Use the React. useState() hook to create the content state variable and set its value to value . Use the React. Use a <div> to wrap both the <textarea> and the <p> element that displays the character count and bind the onChange event of the <textarea> to call setFormattedContent with the value of event. help chat. Meta Stack Overflow By using our site, 3 Get textarea character count using reactjs with help of usestate hook Jan 21.

First of all you should consider that you can't change state value directly by assigning a value to it. Secondly you should use useState hook like this:

const [count, setCount] = useState(0);

Here count is your state and setCount is a function that change (set) state. So your recalculate function must change to:

const recalculate = (e) => {
        console.log('event value:', e);
        setCount(e.target.value.length);
    }

LimitedWordTextarea, Renders a textarea component with a word limit. Use the React.useState() hook to create the content and wordCount state variables and set their values to that displays the character count and bind the onChange event of the <textarea > to� A functional component can have many calls to useState or other Hooks. Each Hook is stored in a list, and there’s a variable that keeps track of the currently executed Hook. When useState is executed, the state of the current Hook is read (or initialized during the first render), and then, the variable is changed to point to the next Hook.

Your code is almost correct, but you have 2 mistakes here

  1. inside recalculate function you should declare the textAreaCount with let keyword.
  2. the useState hook is not used correctly.
import React, {useState} from 'react';

export default function FullWidthTabs() {

const [textAreaCount, settextAreaCount] = React.useState(0);

const recalculate = (e) => {
    let textAreaCount = e.target.value.length;
    console.log(textAreaCount);
}

return(
    <textarea type="text" rows={5} className="full_height_Width"
                                        onChange={recalculate} />
    );
}

4 Examples of the useState Hook, Today, you can get that same functionality with the useState hook, and save yourself the work! (every hook starts with the word “use”; a call to useState literally lets you We also wrote an increment function to increase the step counter. Check that out - I think it'll help make sense of passing props, and� Counter. We need a text (p element) that tells us how many characters we have inserted and the svg element containing the Progress Ring (circle element).Since we need two colors (one to create the gray part and one to create the colored moving part) we will also need two circle elements.

Here is working code. Update the usage of useState.

import React from "react";

export default function FullWidthTabs() {
  const [textAreaCount, setTextAreaCount] = React.useState(0);

  const recalculate = e => {
    console.log("event value:", e);
    setTextAreaCount(e.target.value.length);
  };

  return (
    <div>
      <p> {`Textarea Char Count: ${textAreaCount}`} </p>
      <textarea
        type="text"
        rows={5}
        className="full_height_Width"
        onChange={recalculate}
      />
    </div>
  );
}

usestate hook in react Code Example, Get code examples like "usestate hook in react" instantly right from your google search results Declare a new state variable, which we'll call "count" Source: reactjs.org Learn how Grepper helps you improve as a Developer! changing double space to single in java script � character to ascii in js � characterMapping js � In part one, Simplify Forms using Custom React Hooks, we abstracted away all of the form event handler logic into a custom React Hook.As a result, the code in our form components was reduced by a significant amount.

this is the code you want

https://codesandbox.io/s/rkv88-lsyvo

usestate hook has two parameters the first is the name of the var you want & the second is a function that you pass value to it to change the variable

How to create a Twitter Inspired Character Counter with an SVG , I recently discovered the power of SVGs in HTML and I wanted to build a Inspired Character Counter with an SVG Progress Ring using React under the textarea, there is a really nice Progress Ring that indicates (If not let me now in the comments below or in a private note, I'll try to help you out). The only argument to the useState()Hook is the initial state. useState returns a pair of values: the current state and a function that updates it. This is why we write const [count, setCount] = useState(). This is similar to this.state.count and this.setState in a class. You can use the State Hook more than once in a single component:

Comments
  • const [textAreaCount = 0, textAreaTotal = 250] = React.useState(0); that's not how you are supposed to use state. I'd suggest you to refer the documentation to better understand how the state hook works. Or if you can create minimal reproducible example I can help with that.
  • This textarea i need to use under material UI tabs Here UI tabs wrote useState() hook in reactjs
  • Here i had problem error throws setCount not defined
  • const [count, setCount] = React.useState(0); This statement is array destructuring. If you access setCount, it will definitely work. Check the codesandbox link.