This article covers the blur plugin for Aurelia. This plugin is created for managing focus in your application. The plugin supports the use of dynamic elements matching, via either element references or CSS selectors. Online Demo
- In your JSPM-based project install the plugin via
jspmwith following command
jspm install aurelia-blur-attributeIf you use Webpack, install the plugin with the following command
npm install aurelia-blur-attribute --saveIf you use the Aurelia CLI, install the plugin with the following command
au import aurelia-blur-attributealternatively you can manually add these dependencies to your vendor bundle:
...
"dependencies": [
{
"name": "aurelia-blur-attribute",
"path": "../node_modules/aurelia-blur-attribute/dist/amd",
"main": "aurelia-blur-attribute"
}
]- Make sure you use manual bootstrapping. In order to do so open your
index.htmland locate the element with the attribute aurelia-app. Change it to look like this:
<body aurelia-app="main">...</body>- Create (if you haven't already) a file
main.jsin yoursrcfolder with following content:
export function configure(aurelia) {
/**
* We will cover reasons behind these options in later sections
*/
let listeningModeOptions = {
pointer: false, // listen for pointer event interaction
touch: false, // listen for touch event interaction
mouse: true, // listen for mouse event interaction
focus: false, // listen for foucs event
windowBlur: false // listen for window blur event (navigating away from window)
};
aurelia.use
.standardConfiguration()
.developmentLogging()
.plugin('aurelia-blur-attribute', listeningModeOptions);
aurelia.start().then(a => a.setRoot());
}There are a few scenarios you can take advantage of the Aurelia blur plugin.
- You can use the dialog service to control when a form should be hidden. This is a common case, consider the following dom structure
It's clear that our intent is only trigger the blur, when we interact with any elements outside the form element. One may implement it like following:
<div>
<button click.delegate="formIsBlur = false">Show Form</button>
<form if.bind="formIsBlur">
<input blur.trigger="formIsBlur = true" />
<select blur.trigger="formIsBlur = true"></select>
<input blur.trigger="formIsBlur = true" />
</form>
<!-- Or more optimized version -->
<form if.bind="formIsBlur" blur.capture="formIsBlur = true">
<input />
<select></select>
<input />
</form>
</div>This is often insufficient, as what we do want is to react when either (pointer/ touch/ mouse) down, or focus on elements outside of the form, but what we will get is any focus navigation between inputs. The plugin solves this for you, by listening to some critical events to determine if focus is still inside an element.
<div>
<button click.delegate="formIsBlur = false">Show Form</button>
<form if.bind="formIsBlur" blur.bind="formIsBlur">
<input />
<select ></select>
<input />
</form>Notice the attribute differences: blur.capture / blur.trigger vs blur.bind. When using blur.bind, we are using the plugin, instead event listener.
TODO
To build the code, follow these steps.
- Ensure that NodeJS is installed. This provides the platform on which the build tooling runs.
- From the project folder, execute the following command:
npm install- Ensure that Gulp is installed. If you need to install it, use the following command:
npm install -g gulp- To build the code, you can now run:
npm run build-
You will find the compiled code in the
distfolder, available in three module formats: AMD, CommonJS and ES6. -
See
gulpfile.jsfor other tasks related to generating the docs and linting.
npm run testThanks goes to Dwayne Charrington for his Aurelia-TypeScript starter package https://github.com/Vheissu/aurelia-typescript-plugin