Reduce a table to a maximum number of columns

reduceTableToMaxCols.js

const maxCol = 2;
const table = document.querySelector("table#target");

// Use an array spread to quickly iterate rows in table
[...table.getElementsByTagName("TR")].forEach(row => { 
    // delete all columns beyond max
    while (row.children.length >  maxCol) {
        row.children[maxCol].remove();
    } 
})