The HTMLTableElement.cellPadding property represents the padding around the individual cells of the table.
HTMLTableElement.cellPadding = padding; var padding = HTMLTableElement.cellPadding;
padding is either a number of pixels (e.g. "10") or a percentage value (e.g. "10%").// Set cell padding to 10 pixels
var t = document.getElementById("TableA");
t.cellPadding = "10";
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableElement/cellPadding