Fix #12816. Ensure .find() result are DOM ordered.

src/traversing.js

@@ -12,46 +12,26 @@ var runtil = /Until$/,

jQuery.fn.extend({
	find: function( selector ) {
		var prevLength, n, r, ret,
			i = 0,
			self = this,
			selfLength = this.length;
		var i, ret, self;

		if ( typeof selector !== "string" ) {

			ret = jQuery( selector ).filter(function() {
				for ( ; i < selfLength; i++ ) {
			self = this;
			return this.pushStack( jQuery( selector ).filter(function() {
				for ( i = 0; i < self.length; i++ ) {
					if ( jQuery.contains( self[ i ], this ) ) {
						return true;
					}
				}
			});

		} else {
			}) );
		}

			ret = [];
			for ( ; i < selfLength; i++ ) {
				prevLength = ret.length;
				jQuery.find( selector, this[ i ], ret );

				if ( i > 0 ) {
					// Make sure that the results are unique
					// by comparing the newly added elements on the ith
					// iteration to the elements added by the previous iterations
					for ( n = prevLength; n < ret.length; n++ ) {
						for ( r = 0; r < prevLength; r++ ) {
							if ( ret[ r ] === ret[ n ] ) {
								ret.splice( n--, 1 );
							break;
							}
						}
					}
				}
			}
		ret = [];
		for ( i = 0; i < this.length; i++ ) {
			jQuery.find( selector, this[ i ], ret );
		}

		// Needed because $( selector, context ) becomes $( context ).find( selector )
		ret = this.pushStack( ret );
		ret = this.pushStack( jQuery.unique( ret ) );
		ret.selector = ( this.selector ? this.selector + " " : "" ) + selector;
		return ret;
	},