Current File : //www/varak.net/wiki.varak.net/extensions/VisualEditor/lib/ve/src/init/ve.init.SupportCheck.js
/*!
* VisualEditor initialization support checker.
*
* @copyright 2011-2016 VisualEditor Team and others; see http://ve.mit-license.org
*/
// jshint esversion: 3
( function () {
/**
* Check whether the environment has the needed features to load VisualEditor.
* This considers every ES5 feature, support for contentEditable itself, those
* specific DOM features we use, and SVG support for the user interface. As we
* use this to check for feature compatibility this file must be ES3-parsable.
*
* @method VisualEditorSupportCheck
* @member global
* @return {boolean} True if the environment should support VisualEditor.
*/
window.VisualEditorSupportCheck = function () {
return (
/* ES5 */
!!(
// It would be much easier to do a quick inline function that asserts "use strict"
// works, but since IE9 doesn't support strict mode (and we don't use strict mode)
// we have to instead list all the ES5 features individually.
Array.isArray &&
Array.prototype.filter &&
Array.prototype.indexOf &&
Array.prototype.map &&
Date.now &&
Date.prototype.toJSON &&
Object.create &&
Object.keys &&
String.prototype.trim &&
window.JSON &&
JSON.parse &&
JSON.stringify &&
Function.prototype.bind
) &&
/* contentEditable */
!!( 'contentEditable' in document.createElement( 'div' ) ) &&
/* SVG */
!!(
document.createElementNS &&
document.createElementNS( 'http://www.w3.org/2000/svg', 'svg' ).createSVGRect
)
);
};
}() );
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