how to set column width in datatable in js code example

Example 1: columndefs in datatable not working while setting width jquery

autoWidth: false

Example 2: datatable width column

table.display {
  margin: 0 auto;
  width: 100%;
  clear: both;
  border-collapse: collapse;
  table-layout: fixed;         // add this 
  word-wrap:break-word;        // add this 
}