HTML table to JSON

table2json.js

/**
 * Recursive function that parses table elements
 *
 * @param elHtml - HTML object that contains table
 * @returns { Object } JSON element with parsed table
 */
const parseTable = (elHtml = null) => {
  if (elHtml === null) { return false }

  let elName = String(elHtml.nodeName).toLowerCase()
  let elJson = { nodeName: elName }

  if (['caption', 'td', 'th'].includes(elName)) {
    elJson.content = elHtml.textContent.trim()
  }
  if ('colspan' in elHtml) { elJson.colspan = elHtml.colspan }
  if ('rowspan' in elHtml) { elJson.rowspan = elHtml.rowspan }
  if ('children' in elHtml && elHtml.children.length > 0) {
    elJson.children = []

    elHtml.children.forEach((childElHtml) => {
      elJson.children.push(parseTable(childElHtml))
    })
  }

  return elJson
}