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react-native-typewriter

v0.7.0

Published

A React Native component for creating typing effects

Downloads

6,061

Readme

react-native-typewriter

A React Native component for creating typing effects. Inspired by react-typewriter.

Installation

$ yarn add react-native-typewriter

OR

$ npm install --save react-native-typewriter

Usage

Pass text and a typing direction into the component to control its animation.


import React, { Component } from 'react'
import TypeWriter from 'react-native-typewriter'

class TypingText extends Component {
  render() {
    return <TypeWriter typing={1}>Hello World!</TypeWriter>
  }
}

Documentation

Any props accepted by React Native's Text component are accepted by TypeWriter. These additional props are also accepted:

typing

type: Number default: 0

A value of 1 types text left to right until completion. A value of -1 erases text from right to left. A value of 0 stops the animation.

fixed

type: Boolean default: false

This flag will ensure the enclosing container's size and shape is fixed. Prevents the text from shifting around as it grows into its container.

maxDelay

type: Number default: 100

The maximum delay between each typed token in milliseconds.

minDelay

type: Number default: 20

The minimum delay between each typed token in milliseconds.

delayMap

type: Array[Object] default: none

Adds additional delay to specific characters before the next character is typed.

let delayMap = [
  // increase delay by 100ms at index 4
  { at: 4, delay: 100 },
  // increase delay by 400ms following every '.' character
  { at: '.', delay: 400 },
  // decrease delay by 200ms following every '!' character
  { at: /!/, delay: -200 }
]

initialDelay

type: Number default: 200

The time in milliseconds before the first token is typed.

onTyped

type: Function default: none

A callback called when each token is typed or erased during the animation. The function is called with two arguments: (String token, Number previousVisibleCharacters).

onTypingEnd

type: Function default: none

Called once the typing animation has completed. This callback is not called if props.typing is changed to 0 before the animation completes.

License

Released under the MIT license. See LICENSE for details.