aurelia-image-resizer

This plugin offers two UI components which help a user to pick an image file from its hard drive, convert it to base64 and resize it with a responsive interface. The plugin comes with two components which can be used independantly :

FileReader

<file-reader> displays a file input and take a two-way binding attribute to store the base64 value of the selected file.

Example

<file-reader
  file.bind="myFile"></file-reader>
<code
  if.bind="myFile">${myFile}</code>

ImageResizer

This component take an input and generate an output. If a valid base64 is set as input, then an interface is displayed with the image in a resizing interface the user can manipulate with mouse, keyboard or multitouch. After each operation, output is updated to contain the base64 if the resized jpeg image. The component can bind a zoom attribute to manage the zoom value from the outside. height and width are the dimensions of the final resized image. type and encoder-options are optional attributes passed to toDataURL method to generate ouput image.

Example

<image-resizer
  input.bind="input"
  output.bind="output"
  height="256"
  width="256"
  zoom.bind="zoom"></image-resizer>
<input
  type="number"
  value.bind="zoom">
<code
  if.bind="output">${output}</code>

Install

Aurelia CLI

Install the package:

npm install aurelia-image-resizer --save

Add package configuration to aurelia.json:

 "dependencies": [
  "exif-js", {
    "name": "aurelia-image-resizer",
    "path": "../node_modules/aurelia-image-resizer/dist/amd",
    "main": "index",
    "deps": "exif-js",
    "resources": [
      "./**/*.css",
      "./**/*.html"
    ]
  }
]

In manual bootstrapping:

aurelia.use.plugin('aurelia-image-resizer');

Building The Code

To build the code, follow these steps.

1. Ensure that NodeJS is installed. This provides the platform on which the build tooling runs.
2. From the project folder, execute the following command:

npm install

3. Ensure that Gulp is installed. If you need to install it, use the following command:

npm install -g gulp

4. To build the code, you can now run:

gulp build

5. You will find the compiled code in the dist folder, available in three module formats: AMD, CommonJS and ES6.

6. See gulpfile.js for other tasks related to generating the docs and linting.

Running The Tests

To run the unit tests, first ensure that you have followed the steps above in order to install all dependencies and successfully build the library. Once you have done that, proceed with these additional steps:

1. Ensure that the Karma CLI is installed. If you need to install it, use the following command:

npm install -g karma-cli

2. Ensure that jspm is installed. If you need to install it, use the following commnand:

npm install -g jspm

3. Install the client-side dependencies with jspm:

jspm install

4. You can now run the tests with this command:

karma start