How to use the Sortable library to implement drag-and-drop sorting of table columns without changing row order?

Use the Sortable library to implement drag and drop ordering of table columns, keeping rows unchanged

When many developers use the Sortable library for drag-and-drop sorting, they need to implement the function of only drag-and-drop sorting of columns while keeping the rows unchanged. This article will explain in detail how to use the Sortable library to implement this function.

Problem description:

Assuming the table data is stored in a two-dimensional array, the goal is to implement drag-and-drop sorting of columns, such as moving the "value11" column to the position of the "value22" column. The final effect is that the two columns are exchanged, but the row data remains unchanged. (The picture example is omitted here)

Solution:

The core idea is to use the Sortable library to sort column indexes, and then re-render the tabular data according to the new index order. The Sortable library operates on the order of array elements. We do not directly operate on Sortable moving array elements, but use the index sorting results it provides to reorganize the data.

Suppose your data structure is as follows:

 let data = [
  ['value11', 'value12', 'value13'],
  ['value21', 'value22', 'value23'],
  ['value31', 'value32', 'value33']
];

After using the Sortable library, assume that you get the new column index order:

 let newOrder = [1, 0, 2]; // The new order returned by Sortable means that the second column is now in the first place

Rebuild the table data according to newOrder :

 let newData = data.map(row => row.map((_, index) => row[newOrder[index]]));

newData now contains the reordered column data, and you can re-render the table with newData . Remember that array indexes start at 0, and a table may need to be added to 1 when displaying. The Sortable library is only responsible for index sorting, and data reorganization needs to be done manually according to the index order provided by Sortable.

In this way, you can use the drag and drop function of the Sortable library to achieve the sorting of table columns while keeping the row order unchanged, thereby achieving the expected results. The key is to understand that the Sortable library operates on indexes, not the data itself, and developers need to reconstruct data based on the index.

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