midi-player-js
Version:
Midi parser & player engine for browser or Node. Works well with single or multitrack MIDI files.
36 lines (33 loc) • 1.27 kB
JavaScript
/*!
{
"name": "getRandomValues",
"property": "getrandomvalues",
"caniuse": "window.crypto.getRandomValues",
"tags": ["crypto"],
"authors": ["komachi"],
"notes": [{
"name": "W3C Editor’s Draft",
"href": "https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#RandomSource-method-getRandomValues"
}],
"polyfills": [
"polycrypt"
]
}
!*/
/* DOC
Detects support for the window.crypto.getRandomValues for generate cryptographically secure random numbers
*/
define(['Modernizr', 'prefixed', 'is'], function(Modernizr, prefixed, is) {
// In Safari <=5.0 `window.crypto` exists (for some reason) but is `undefined`, so we have to check
// it’s truthy before checking for existence of `getRandomValues`
var crypto = prefixed('crypto', window);
var supportsGetRandomValues;
// Safari 6.0 supports crypto.getRandomValues, but does not return the array,
// which is required by the spec, so we need to actually check.
if (crypto && 'getRandomValues' in crypto && 'Uint32Array' in window) {
var array = new Uint32Array(10);
var values = crypto.getRandomValues(array);
supportsGetRandomValues = values && is(values[0], 'number');
}
Modernizr.addTest('getrandomvalues', !!supportsGetRandomValues);
});