mirror of
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62 lines
1.7 KiB
JavaScript
62 lines
1.7 KiB
JavaScript
/*!
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{
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"name": "Proximity API",
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"property": "proximity",
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"authors": ["Cătălin Mariș"],
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"tags": ["events", "proximity"],
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"caniuse": "proximity",
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"notes": [{
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"name": "MDN Docs",
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"href": "https://developer.mozilla.org/en-US/docs/Web/API/Proximity_Events"
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}, {
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"name": "W3C Spec",
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"href": "https://www.w3.org/TR/proximity/"
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}]
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}
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!*/
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/* DOC
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Detects support for an API that allows users to get proximity related information from the device's proximity sensor.
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*/
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define(['Modernizr', 'addTest'], function(Modernizr, addTest) {
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Modernizr.addAsyncTest(function() {
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var timeout;
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var timeoutTime = 300;
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function advertiseSupport() {
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// Clean up after ourselves
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clearTimeout(timeout);
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window.removeEventListener('deviceproximity', advertiseSupport);
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// Advertise support as the browser supports
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// the API and the device has a proximity sensor
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addTest('proximity', true);
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}
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// Check if the browser has support for the API
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if ('ondeviceproximity' in window && 'onuserproximity' in window) {
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// Check if the device has a proximity sensor
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// ( devices without such a sensor support the events but
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// will never fire them resulting in a false positive )
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window.addEventListener('deviceproximity', advertiseSupport);
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// If the event doesn't fire in a reasonable amount of time,
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// it means that the device doesn't have a proximity sensor,
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// thus, we can advertise the "lack" of support
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timeout = setTimeout(function() {
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window.removeEventListener('deviceproximity', advertiseSupport);
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addTest('proximity', false);
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}, timeoutTime);
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} else {
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addTest('proximity', false);
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}
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});
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});
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