the use of elementUI, in a project requires a single-row N-column table. The number of columns is not fixed and needs to be generated dynamically. And the contents of each cell provide editing function.
< hr > dynamically generated columns are implemented by  el-table-column  
  http://jsfiddle.net/6ar2jons/.
 column editing is implemented by custom cell contents 
  https://jsfiddle.net/q6b54vry/
 the above two requirements can be implemented separately, but after merging, the data cannot be rendered 
  https://jsfiddle.net/8rqjw0yg/1/
, how can we bind the data to the cell? 
