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How to Implement Input Auto-tab in React JS

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by Abdul Rawoof A R dot icon Updated: Mar 24, 2023

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To implement an Auto-tab input field in React, we have to initially create an array of refs and then map them to the inputs. Then, add a key-up event listener to update the input focusing on the next input automatically. 


The library we use here to implement the auto tab is jQuery focus(). It is an inbuilt method that is used to focus on an element. With a mouse click, the elements get focused or the tab-navigation button. Here selected element is the selector. Parameter: when the focus event occurs, it accepts an optional parameter 'function', which specifies the function to run. Here we'll see a small example of jQuery Auto Tab for the next input field if we fill one character input box. After that, it automatically redirects to the next field using jQuery. Some main functions used to implement auto tab to next field using jQuery: keyup(), next(), and focus functions. 

  • keyup() - it is fired when a key is released, and the key down and key up events provide a code indicating which key is pressed, while the keypress indicates which character was entered. 
  • next() - it allows us to search among the instantly following sibling of these elements in the Document Object Model tree, and it constructs a new jQuery object from the matching element. This method optionally accepts a selector expression of the same type, which we can pass to the $() function. 
  • focus() - It is a built method that focuses on an element, and the element gets focused by the mouse click or the tab-navigating button. Syntax for focus() - $(selector). focus(function). 


Here is an example of how you can implement the input Auto tab in React: 

Fig : Preview of the output that you will get on running this code from your IDE.

Code

In this solution we're using React and jquery library.

Lines of Code : 62dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
const autoTab = e => {
  const BACKSPACE_KEY = 8;
  const DELETE_KEY = 46;
  let tabindex = $(e.target).attr("tabindex") || 0;
  tabindex = Number(tabindex);
  if (e.keyCode === BACKSPACE_KEY) {
    tabindex -= 1;
  } else if (e.keyCode !== DELETE_KEY) {
    tabindex += 1;
  }
  const elem = $("[tabindex=" + tabindex + "]");
  if (elem[0]) {
    elem.focus();
  }
};

const blocks = Array.from({ length: 10 }, (element, index) => (
  <input
    className="block"
    tabIndex={index}
    key={index}
    maxLength={1}
    onKeyUp={autoTab}
  />
));

const autoTab = e => {
  const BACKSPACE_KEY = 8;
  const DELETE_KEY = 46;
  let tabindex = $(e.target).attr("data-index") || 0;
  tabindex = Number(tabindex);
  let elem = null;
  if (e.keyCode === BACKSPACE_KEY) {
    elem = tabindex > 0 && elemRefs[tabindex - 1];
  } else if (e.keyCode !== DELETE_KEY) {
    elem = tabindex < elemRefs.length - 1 && elemRefs[tabindex + 1];
  }
  if (elem) {
    elem.current.focus();
  }
};

const Input = props => {
  const ref = React.createRef();
  elemRefs.push(ref);
  return (
    <input
      className="block"
      data-index={props.index}
      ref={ref}
      maxLength={1}
      onKeyUp={props.autoTab}
    />
  );
};

const blocks = Array.from({ length: 10 }, (element, index) => (
  <Input key={index} index={index} autoTab={autoTab} />
));

const App = () => <div className="App">{blocks}</div>;

Instructions

Follow the steps carefully to get the output easily.

  1. Install the Node.js and React on your IDE(preferable Visual Studio Code).
  2. Create React Application using npx create-react-app foldername.
  3. cd foldername.
  4. Install npm install jquery.
  5. Open the folder in IDE.
  6. Copy the code using "copy" button above and paste it in index.js file(above code mixed with two set of codes, one is original another one is edited, you have to use edited one so please refer demo given below).
  7. Open the terminal from IDE.
  8. npm start to run the file.


You can also refer this url 'DEMO' for getting the above output.

I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.


I found this code snippet by searching for 'how to implement input auto-tab in react' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in Visual Studio Code 1.73.1.
  2. The solution is tested on node v18.12.1 and npm v8.19.2.
  3. React version-18.2.0.
  4. jquery version-3.6.0.


Using this solution, we are able to implement input auto tab in react with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to implement input auto tab in react.

Dependent Libraries

reactby facebook

JavaScript doticonstar image 209050 doticonVersion:v18.2.0doticon
License: Permissive (MIT)

The library for web and native user interfaces

Support
    Quality
      Security
        License
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            reactby facebook

            JavaScript doticon star image 209050 doticonVersion:v18.2.0doticon License: Permissive (MIT)

            The library for web and native user interfaces
            Support
              Quality
                Security
                  License
                    Reuse

                      jqueryby jquery

                      JavaScript doticonstar image 57560 doticonVersion:3.7.0doticon
                      License: Permissive (MIT)

                      jQuery JavaScript Library

                      Support
                        Quality
                          Security
                            License
                              Reuse

                                jqueryby jquery

                                JavaScript doticon star image 57560 doticonVersion:3.7.0doticon License: Permissive (MIT)

                                jQuery JavaScript Library
                                Support
                                  Quality
                                    Security
                                      License
                                        Reuse

                                          You can also search for any dependent libraries on kandi like 'react' and 'jquery'.

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