React resize image

React component for resizing image on the fly with RSZ.io.
RSZ.IO is a free image resizing proxy that can resize images, change image formats and optimize images for your website.

Motivation

My website is slow because of my image is so big. And then i use rsz.io for resizing all of my in my website images. The result is it becomes so fast as lightning. So, why not make react components for wrapping images to be fast with rsz.io ?

Development

I use https://github.com/damaera/publish-react-component Boilerplate for publishing react component to npm, With testing and storybook.

here is the folder structure

The core of this component is just manipulating link with rsz.io. you can look at the code at /src/getRSZioUrl. With regex it check link at first, and then if it's link it's insert rsz.io before hostname and adding params if options available.

const getRSZioUrl = (src, options) => {
  let result = src

  // if is link
  if (/^https?:\/\//.test(src)) {
    result = result.replace(/^(https?:\/\/)/, '$1rsz.io/')
    if (options) {
      result += '?' + objectToParams(options)
    }
  }
  return result/*  */
}

Then wrap it to img components

const ResizeImage = (props) => {
  const { src, options, style, alt, resizeActive } = props

  return (
    <img
      src={resizeActive ? getRSZioUrl(src, options) : src}
      alt={alt}
      style={style}
    />
  )
}

Finally you can try the result here

Install

yarn add react-resize-image

Usage

import React, { Component } from 'react'
import ResizeImage from 'react-resize-image'

class componentName extends Component {
  render () {
    return (
      <ResizeImage
        src={src}
        alt="Tsunami bt hokusai"
        options={{ width: 200 }}
      />
    )
  }
}

export default componentName

Props

List of props components

Props	Desc
`src`	`required` image source, must be absolute path from http or https
`alt`	`required` image alt
`resizeActive`	`optional` for enabling or disabling resizer. For example if you using your localhost or local development environment, you should disable it.
`options`	`optional` RSZ.io options, for more options please visit http://rsz.io/
`style`	`optional` component style