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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | 1x 1x 3x 3x 3x 3x 3x 3x 3x | /*! * VisualEditor initialization support checker. * * @copyright See AUTHORS.txt */ ( 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 ( /* ES6 */ ( function () { try { // eslint-disable-next-line no-new, no-new-func new Function( '(a = 0) => a' ); return true; } catch ( e ) { return false; } }() ) && /* ES6 RegExp.prototype.flags */ /./g.flags === 'g' && // TODO: Most of the below checks can probably be removed as they are supported in all ES6 browsers. /* contentEditable */ !!( 'contentEditable' in document.createElement( 'div' ) ) && /* createElementNS */ !!document.createElementNS && /* DOMParser */ ( function () { var doc; try { doc = new DOMParser().parseFromString( '<body></body>', 'text/html' ); } catch ( e ) {} return doc instanceof HTMLDocument; }() ) && /* classList */ !!( ( 'classList' in document.createElement( '_' ) ) || ( 'classList' in document.createElementNS( 'http://www.w3.org/2000/svg ', 'g' ) ) ) && /* SVG */ !!( 'createSVGRect' in document.createElementNS( 'http://www.w3.org/2000/svg', 'svg' ) ) ); }; }() ); |