mirror of
https://github.com/jspsych/jsPsych.git
synced 2025-05-10 11:10:54 +00:00
36 lines
1.4 KiB
Markdown
36 lines
1.4 KiB
Markdown
# Extensions
|
|
|
|
In jsPsych, extensions allow one to extend the functionality of various plugins, giving individual plugins the ability to collect more data, display additional stimuli, and more. A canonical example of an extension is [eye tracking](../extensions/webgazer.md), which allow plugins to gather gaze data and add it to the their respective data objects. For a full list of extensions directly included in the jsPsych release, see [here](../extensions/list-of-extensions.md).
|
|
|
|
## Using an Extension
|
|
|
|
To use an extension in an experiment, you'll load the extension file via a `<script>` tag (just like adding a plugin) and then initialize the extension in the parameters of `initJsPsych()`.
|
|
|
|
```html
|
|
<head>
|
|
<script src="https://unpkg.com/jspsych@8.2.0"></script>
|
|
<script src="https://unpkg.com/@jspsych/extension-example@1.0.0"></script>
|
|
</head>
|
|
```
|
|
|
|
```js
|
|
initJsPsych({
|
|
extensions: [
|
|
{ type: jsPsychExtensionExample, params: {...} }
|
|
]
|
|
})
|
|
```
|
|
|
|
To enable an extension during a trial, add the extension to the `extensions` list for the trial. Some extensions may also support or require an object of parameters to configure the extension:
|
|
|
|
```js
|
|
var trial = {
|
|
extensions: [
|
|
{ type: jsPsychExtensionExample, params: {...} }
|
|
]
|
|
}
|
|
```
|
|
|
|
## Writing an Extension
|
|
|
|
See our [developer's guide for extensions](../developers/extension-development.md) for information about how to create a new extension. |