jSpreadsheet plugin auto width :

Set Width auto to col A Set Width auto to col B Set Width auto to col C Set Width auto to col D

plugins: [
        { name:'autoWidth', plugin:jss_autoWidth },
],
defaultColWidth:80, // Min width of columns

Set width auto programmaticaly :

Table1.setWidth(0, 'auto');

This plugins are the free plugins available on Repo of JSpreadsheet plugins

Download full version Documentation

get started to use this plugin with this CDN :

<script src="https://cdn.jsdelivr.net/gh/GBonnaire/jspreadsheet-plugins-and-editors@latest/plugins/JSSV8/src/autoWidth/index.js"></script>