Repository: jquery/jquery
File: src/traversing.js (JavaScript)

Code before:
	},
	prevAll: function( elem ) {
		return dir( elem, "previousSibling" );
	},
	nextUntil: function( elem, i, until ) {
		return dir( elem, "nextSibling", until );
	},
	prevUntil: function( elem, i, until ) {
		return dir( elem, "previousSibling", until );
	},
	siblings: function( elem ) {
		return siblings( ( elem.parentNode || {} ).firstChild, elem );
	},
	children: function( elem ) {
		return siblings( elem.firstChild );
	},
	contents: function( elem ) {
        if ( jQuery.nodeName( elem, "iframe" ) ) {
            return elem.contentDocument;
        }

        if ( jQuery.nodeName( elem, "template" ) ) {
            elem = elem.content || elem;
        }

        return jQuery.merge( [], elem.childNodes );
	}
}, function( name, fn ) {
	jQuery.fn[ name ] = function( until, selector ) {
		var matched = jQuery.map( this, fn, until );

		if ( name.slice( -5 ) !== "Until" ) {
			selector = until;
		}

		if ( selector && typeof selector === "string" ) {
			matched = jQuery.filter( selector, matched );
		}

		if ( this.length > 1 ) {

			// Remove duplicates
			if ( !guaranteedUnique[ name ] ) {
				jQuery.uniqueSort( matched );
			}

			// Reverse order for parents* and prev-derivatives
			if ( rparentsprev.test( name ) ) {
				matched.reverse();
			}
		}

Review comment (suggestion):
@TechQuery All places where a specific logic has to be applied because of deficiencies of a browser a support comment needs to be added like [this one](https://github.com/jquery/jquery/blob/2d4f53416e5f74fa98e0c1d66b6f3c285a12f0ce/src/data.js#L110).

In this case, I'd expect something like that:
```js
// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
// Treat the template element as a regular one in browsers that
// don't support it.
```
It's only necessary to mention browsers we still support; see https://jquery.com/browser-support/.

Code after:
	},
	prevAll: function( elem ) {
		return dir( elem, "previousSibling" );
	},
	nextUntil: function( elem, i, until ) {
		return dir( elem, "nextSibling", until );
	},
	prevUntil: function( elem, i, until ) {
		return dir( elem, "previousSibling", until );
	},
	siblings: function( elem ) {
		return siblings( ( elem.parentNode || {} ).firstChild, elem );
	},
	children: function( elem ) {
		return siblings( elem.firstChild );
	},
	contents: function( elem ) {
        if ( jQuery.nodeName( elem, "iframe" ) ) {
            return elem.contentDocument;
        }

        // Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
        // Treat the template element as a regular one in browsers that
        // don't support it.
        if ( jQuery.nodeName( elem, "template" ) ) {
            elem = elem.content || elem;
        }

        return jQuery.merge( [], elem.childNodes );
	}
}, function( name, fn ) {
	jQuery.fn[ name ] = function( until, selector ) {
		var matched = jQuery.map( this, fn, until );

		if ( name.slice( -5 ) !== "Until" ) {
			selector = until;
		}

		if ( selector && typeof selector === "string" ) {
			matched = jQuery.filter( selector, matched );
		}

		if ( this.length > 1 ) {

			// Remove duplicates
			if ( !guaranteedUnique[ name ] ) {
				jQuery.uniqueSort( matched );
			}

			// Reverse order for parents* and prev-derivatives
			if ( rparentsprev.test( name ) ) {