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ember-context-id-helper

v0.3.0

Published

The default blueprint for ember-cli addons.

Downloads

100

Readme

ember-context-id-helper

This addon provides an helper {{context-id}} that generate a unique for a specified context. It take inspirations from this Pre RFC.

Compatibility

  • Ember.js v3.12 or above
  • Ember CLI v2.13 or above
  • Node.js v10 or above

Installation

ember install ember-context-id-helper

Usage

The {{context-id}} generates a unique id for a given context. Because it uses the ember guidFor function under the hood, it will always return the same id for the same context. A use case for context-id helper is to programmatically associate labels and input element using the label's for attribute and the input's id attribute.

// components/my-input.hbs
<label for="{{context-id this}}-input">Input Label</label>
<input id="{{context-id this}}-input" type="text"/>

When used in a template the previous component template will render an input and is associated label.

Using the same component multiple times in the same route template (or inside another component) will render multiple inputs and their associated labels. Every input will have a different id and every label will have the for attribute fill out with the id of the associated input.

For exemple the folowing code :

<MyInput />
<MyInput />

Will render

<label for="emberxx1-input">Input Label</label>
<input id="emberxx1-input" type="text"/>
<label for="emberxx2-input">Input Label</label>
<input id="emberxx2-input" type="text"/>

By default context-id will use a component/template this as context but you can also manually provide a context if you want. A context can be any object, string, number, Element, or primitive, however we recommend not using a string or a number because context-id will generate the same id for the same value. For example if you you modify the previous example like this:

// components/my-input.hbs
<label for="{{context-id "my-input"}}-input">Input Label</label>
<input id="{{context-id "my-input"}}-input" type="text"/>

All uses of MyInput will generate an input with the same id.

Contributing

See the Contributing guide for details.

License

This project is licensed under the MIT License.