@twreporter/zoom-in NPM

zoom-in

npm (latest) npm (rc)

zoom-in-demo

What is this

A React Component for zooming images like Medium.

It is built by The Reporter Taiwan and published as an npm package.

Inspired by medium-zoom, except this tool grooves the React way.

How to use this package

Installation

yarn add @twreporter/zoom-in

or you can use npm:

npm install --save @twreporter/zoom-in

Usage

import zoomIn from '@twreporter/zoom-in'
;<zoomIn.Component
  src={imageSrc}
  alt={imageAlt}
  caption={caption}
  theme={customizedTheme}
/>

Example: codesandbox example

Props

props	type	default	description
src	string	''	The image link which will be `src` of `<img>`.
alt	string	''	An alternate text for the image which will be `alt` of `<img>`.
caption	string	''	A small piece of text that appears around the image.
theme	object	default theme	See the theme structure and prop types below.

theme

{
  /**
   * The container to frame zoomed image.
   */
  frame: {
    /**
     * Frame size in pixels
     */
    width: PropTypes.number,
    height: PropTypes.number,
    /**
     * Distances from viewport in pixels.
     */
    top: PropTypes.number,
    bottom: PropTypes.number,
    left: PropTypes.number,
    right: PropTypes.number,
  },
  /**
   * Overlay fills the entire area of the frame,
   * where the zoomed image is presented on top of it.
   */
  overlay: {
    background: PropTypes.string,
    opacity: PropTypes.number,
    zIndex: PropTypes.number,
  },
  /**
   * The zoomed image margins relative to frame.
   */
  image: {
    marginTop: PropTypes.number,
    marginBottom: PropTypes.number,
    marginLeft: PropTypes.number,
    marginRight: PropTypes.number,
  },
  /**
   * Caption is a small piece of text that appears around the image.
   */
  caption: {
    /**
     * The place outside the caption around the zoomed image.
     */
    marginTop: PropTypes.number,
    marginBottom: PropTypes.number,
    marginLeft: PropTypes.number,
    marginRight: PropTypes.number,
    /**
     * The font style of caption around the zoomed image.
     */
    fontSize: PropTypes.number,
    lineHeight: PropTypes.number,
    letterSpacing: PropTypes.number,
    color: '#000',
    fontFamily: PropTypes.string,
    /**
     * To show caption beneath the original image or not.
     */
    showCaptionWhenZoomOut: PropTypes.bool,
  },
  zoomOptions: {
    /**
     * The transition duration for zoom in/out animation.
     */
    transitionDuration: PropTypes.number,
    /**
     * The transition function for zoom in/out animation.
     */
    transitionFunction: PropTypes.string,
    /**
     * The number of pixels to scroll to zoom out.
     */
    scrollOffset: PropTypes.number,
  }
}

default theme

{
  frame: {
    width: document.documentElement.clientWidth
    height: document.documentElement.clientHeight
    top: 0,
    bottom: 0,
    left: 0,
    right: 0,
  },
  overlay: {
    background: '#fff',
    opacity: 1,
    zIndex: 1,
  },
  image: {
    marginTop: 0,
    marginLeft: 0,
    marginRight: 0,
    marginBottom: 0,
  },
  caption: {
    marginLeft: 0,
    marginRight: 0,
    marginTop: 0,
    marginBottom: 0,
    fontSize: 12,
    lineHeight: 18,
    letterSpacing: 0.34,
    color: '#000',
    fontFamily: '',
    showCaptionWhenZoomOut: false,
  },
  zoomOptions: {
    transitionDuration: 300,
    transitionFunction: 'cubic-bezier(0.2, 0, 0.2, 1)',
    scrollOffset: 30,
  }
}

Build Embedded Code

You might want to build embedded code and make it embed in <body> element of a HTML document.

import zoomIn from '@twreporter/zoom-In'
import zoomInWebpackAssets from '@twreporter/zoom-in/dist/webpack-assets.json'

// mock data
mock: {
  src: 'https://i.imgur.com/gezB3it.jpg',
  alt: 'this is alternative text',
  caption: 'this is the caption'
}

const embeddedCode = zoomIn.buildEmbeddedCode(
  {
    data: mock
  },
  zoomInWebpackAssets
)

How to develop this package

We use webpack-dev-server to render a mock data for development.
```
# Start the webpack-dev-server
make dev-server
```
Or use babel --watch to complie the source file if there's any change happened
```
make dev
```
If you need to update the embedded code, there is an embedded code testing server serves a html document with injected embedded code

# Build testing embedded code and start express server to test it
make test-embedded-code

How to publish this package

# Babel transpile es6 and above to es5 at lib/
# Build webpack bundles, chunks and webpack-assets.json to dist/
# Files in lib/ and dist/ folders will be published to npm

make build