src/common/js/winjs/js/ui.js
function assignGroupMarginsAndHeaders(offset) {
                        if (options.last) {
                            // When looking for the *last* group, the *trailing* header and margin belong to the group.
                            return offset - that._getHeaderSizeGroupAdjustment() - that._sizes.itemsContainerOuterStart;
                        } else {
                            // When looking for the *first* group, the *leading* header and margin belong to the group.
                            // No need to make any adjustments to offset because the correct header and margin
                            // already belong to the group.
                            return offset;
                        }
                    }
function assignGroupMarginsAndHeaders(offset) {
                        if (options.last) {
                            // When looking for the *last* group, the *trailing* header and margin belong to the group.
                            return offset - that._getHeaderSizeGroupAdjustment() - that._sizes.itemsContainerOuterStart;
                        } else {
                            // When looking for the *first* group, the *leading* header and margin belong to the group.
                            // No need to make any adjustments to offset because the correct header and margin
                            // already belong to the group.
                            return offset;
                        }
                    }
function assignGroupMarginsAndHeaders ( offset ) { if ( options . last ) { // When looking for the *last* group, the *trailing* header and margin belong to the group. return offset - that . _getHeaderSizeGroupAdjustment ( ) - that . _sizes . itemsContainerOuterStart ; } else { // When looking for the *first* group, the *leading* header and margin belong to the group. // No need to make any adjustments to offset because the correct header and margin // already belong to the group. return offset ; } }
Assign the headers and margins to the appropriate groups.
Assign the headers and margins to the appropriate groups .