Javascript typing in div

How to simulate typing in an input box with javascript?

Simulating typing in an input box can add an interactive touch to your web pages and improve the user experience. It can be achieved using JavaScript by manipulating the value of the input field and updating it with a delay to create the illusion of someone typing. There are several methods to accomplish this task, each with its own advantages and disadvantages.

Method 1: Using setTimeout()

To simulate typing in an input box with JavaScript using setTimeout() , you can use the following code:

const inputBox = document.getElementById("input-box"); const textToType = "Hello, world!"; let index = 0; function typeText()  inputBox.value += textToType[index]; index++; if (index  textToType.length)  setTimeout(typeText, 100); > > setTimeout(typeText, 100);

In this code, we first retrieve the input box element by its ID and define the text we want to type. We also define a variable index to keep track of the current character being typed.

The typeText() function is where the magic happens. It appends the current character to the input box value, increments the index variable, and checks if there are more characters to type. If there are, it calls itself again after a 100ms delay using setTimeout() . This creates the effect of typing one character at a time.

Finally, we call setTimeout() once more to kick off the typing process.

Note that this is just one way to simulate typing with JavaScript, and there are many other methods available. However, using setTimeout() is a simple and effective approach that can be easily customized to suit your needs.

Method 2: Using setInterval()

To simulate typing in an input box with Javascript using setInterval(), you can follow these steps:

1. First, you need to select the input box element using document.querySelector() or document.getElementById().

const inputBox = document.querySelector('#input-box');

const characters = text.split('');

1. Now, you can use setInterval() to simulate typing by adding each character to the input box value with a delay between each character.

let i = 0; const intervalId = setInterval(() =>  inputBox.value += characters[i]; i++; if (i === characters.length)  clearInterval(intervalId); > >, 100);

In this example, the setInterval() function is called every 100 milliseconds. It adds the next character in the characters array to the input box value until all characters have been added. Then, the interval is cleared using clearInterval().

const inputBox = document.querySelector('#input-box'); const text = "Hello, world!"; const characters = text.split(''); let i = 0; const intervalId = setInterval(() =>  inputBox.value += characters[i]; i++; if (i === characters.length)  clearInterval(intervalId); > >, 100);

This code will simulate typing «Hello, world!» in the input box with a delay of 100 milliseconds between each character.

Method 3: Using requestAnimationFrame()

Here’s an example of how to simulate typing in an input box using requestAnimationFrame():

const input = document.querySelector('#myInput'); const text = 'Hello, World!'; let index = 0; function type()  input.value += text[index]; index++; if (index  text.length)  requestAnimationFrame(type); > > requestAnimationFrame(type);

In this example, we first select the input box using document.querySelector() . We then define a text variable with the text we want to simulate typing. We also define an index variable to keep track of which character we’re currently typing.

The type() function is where the magic happens. We append the next character in the text variable to the input box using input.value += text[index] . We then increment the index variable to move on to the next character.

If there are still characters left to type, we call requestAnimationFrame(type) to schedule the next iteration of the type() function. This way, the typing animation is smooth and doesn’t block the UI thread.

That’s it! With just a few lines of code and the power of requestAnimationFrame() , we can simulate typing in an input box in JavaScript.

Method 4: Using a Library

To simulate typing in an input box with JavaScript, you can use a library called TypeIt.js . This library allows you to create lifelike typing effects that can be used to simulate typing in an input box. Here are the steps to use this library:

1. First, download the TypeIt.js library from the official website or install it using npm.
2. In your HTML file, create an input box element with an ID that you can reference in your JavaScript code.

input type="text" id="input-box">

1. In your JavaScript file, import the TypeIt.js library and create a new instance of the TypeIt object.

import TypeIt from 'typeit'; const inputBox = document.getElementById('input-box'); const typeItInstance = new TypeIt(inputBox,  speed: 50, deleteSpeed: 50, lifeLike: true >);

1. Use the type method to simulate typing in the input box. You can pass in a string or an array of strings to simulate multiple typing effects.

typeItInstance.type('Hello, world!');

typeItInstance .type('Hello,') .pause(500) .type(' world!');

Here is the complete code example:

import TypeIt from 'typeit'; const inputBox = document.getElementById('input-box'); const typeItInstance = new TypeIt(inputBox,  speed: 50, deleteSpeed: 50, lifeLike: true >); typeItInstance .type('Hello,') .pause(500) .type(' world!') .go();

This will simulate typing «Hello, world!» in the input box with a lifelike typing effect. You can customize the typing speed, delete speed, and other options by passing in options to the TypeIt constructor.

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A JavaScript Typing Animation Library

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mattboldt/typed.js

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README.md

Typed.js is a library that types. Enter in any string, and watch it type at the speed you’ve set, backspace what it’s typed, and begin a new sentence for however many strings you’ve set.

script src pl-s">https://unpkg.com/typed.js@2.0.16/dist/typed.umd.js">script>

For use directly in the browser via tag:

 span id pl-s">element">span> script src pl-s">https://unpkg.com/typed.js@2.0.16/dist/typed.umd.js">script> script> var typed = new Typed('#element',  strings: ['First sentence.', '& a second sentence.'], typeSpeed: 50, >); script> body>

For use with a build tool like Vite, and/or in a React application, install with NPM or Yarn.

import Typed from 'typed.js'; const typed = new Typed('#element',  strings: ['First sentence.', '& a second sentence.'], typeSpeed: 50, >);

import React from 'react'; import Typed from 'typed.js'; function MyComponent()  // Create reference to store the DOM element containing the animation const el = React.useRef(null); React.useEffect(() =>  const typed = new Typed(el.current,  strings: ['First sentence.', '& a second sentence.'], typeSpeed: 50, >); return () =>  // Destroy Typed instance during cleanup to stop animation typed.destroy(); >; >, []); return ( div className="App"> span ref=el> /> /div> ); >

Wonderful sites that have used (or are using) Typed.js

Strings from static HTML (SEO Friendly)

Rather than using the strings array to insert strings, you can place an HTML div on the page and read from it. This allows bots and search engines, as well as users with JavaScript disabled, to see your text on the page.

script> var typed = new Typed('#typed',  stringsElement: '#typed-strings' >); /script>

div id pl-s">typed-strings"> p>Typed.js is a strong>JavaScriptstrong> library.p> p>It em>typesem> out sentences.p> div> span id pl-s">typed">span>

You can pause in the middle of a string for a given amount of time by including an escape character.

var typed = new Typed('#element',  // Waits 1000ms after typing "First" strings: ['First ^1000 sentence.', 'Second sentence.'], >);

In the following example, this would only backspace the words after «This is a»

var typed = new Typed('#element',  strings: ['This is a JavaScript library', 'This is an ES6 module'], smartBackspace: true, // Default value >);

The following example would emulate how a terminal acts when typing a command and seeing its result.

var typed = new Typed('#element',  strings: ['git push --force ^1000\n `pushed to origin with option force`'], >);

CSS animations are built upon initialization in JavaScript. But, you can customize them at your will! These classes are:

/* Cursor */ .typed-cursor < >/* If fade out option is set */ .typed-fade-out

var typed = new Typed('#element',  /** * @property array> strings strings to be typed * @property string> stringsElement ID of element containing string children */ strings: [ 'These are the default values. ', 'You know what you should do?', 'Use your own!', 'Have a great day!', ], stringsElement: null, /** * @property number> typeSpeed type speed in milliseconds */ typeSpeed: 0, /** * @property number> startDelay time before typing starts in milliseconds */ startDelay: 0, /** * @property number> backSpeed backspacing speed in milliseconds */ backSpeed: 0, /** * @property boolean> smartBackspace only backspace what doesn't match the previous string */ smartBackspace: true, /** * @property boolean> shuffle shuffle the strings */ shuffle: false, /** * @property number> backDelay time before backspacing in milliseconds */ backDelay: 700, /** * @property boolean> fadeOut Fade out instead of backspace * @property string> fadeOutClass css class for fade animation * @property boolean> fadeOutDelay Fade out delay in milliseconds */ fadeOut: false, fadeOutClass: 'typed-fade-out', fadeOutDelay: 500, /** * @property boolean> loop loop strings * @property number> loopCount amount of loops */ loop: false, loopCount: Infinity, /** * @property boolean> showCursor show cursor * @property string> cursorChar character for cursor * @property boolean> autoInsertCss insert CSS for cursor and fadeOut into HTML */ showCursor: true, cursorChar: '|', autoInsertCss: true, /** * @property string> attr attribute for typing * Ex: input placeholder, value, or just HTML text */ attr: null, /** * @property boolean> bindInputFocusEvents bind to focus and blur if el is text input */ bindInputFocusEvents: false, /** * @property string> contentType 'html' or 'null' for plaintext */ contentType: 'html', /** * Before it begins typing * @param Typed> self */ onBegin: (self) => >, /** * All typing is complete * @param Typed> self */ onComplete: (self) => >, /** * Before each string is typed * @param number> arrayPos * @param Typed> self */ preStringTyped: (arrayPos, self) => >, /** * After each string is typed * @param number> arrayPos * @param Typed> self */ onStringTyped: (arrayPos, self) => >, /** * During looping, after last string is typed * @param Typed> self */ onLastStringBackspaced: (self) => >, /** * Typing has been stopped * @param number> arrayPos * @param Typed> self */ onTypingPaused: (arrayPos, self) => >, /** * Typing has been started after being stopped * @param number> arrayPos * @param Typed> self */ onTypingResumed: (arrayPos, self) => >, /** * After reset * @param Typed> self */ onReset: (self) => >, /** * After stop * @param number> arrayPos * @param Typed> self */ onStop: (arrayPos, self) => >, /** * After start * @param number> arrayPos * @param Typed> self */ onStart: (arrayPos, self) => >, /** * After destroy * @param Typed> self */ onDestroy: (self) => >, >);

Thanks for checking this out. If you have any questions, I’ll be on Twitter.

If you’re using this, let me know! I’d love to see it.

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