isSupported(feature, version) {
        if (utils_1.isDocument(this)) {
            return this.implementation.hasFeature(feature, version);
        }
        else {
            return this.ownerDocument.implementation.hasFeature(feature, version);
        }
    }
// Introduced in DOM Level 2:
Introduced in DOM Level 2.
Introduced in DOM Level 2 .
isSupported(feature, version) {
        if (utils_1.isDocument(this)) {
            return this.implementation.hasFeature(feature, version);
        }
        else {
            return this.ownerDocument.implementation.hasFeature(feature, version);
        }
    }
isSupported ( feature , version ) { if ( utils_1 . isDocument ( this ) ) { return this . implementation . hasFeature ( feature , version ) ; } else { return this . ownerDocument . implementation . hasFeature ( feature , version ) ; } }
Introduced in DOM Level 2:
Introduced in DOM Level 2 :