table2json.js

// WORK IN PROGRESS
{

    const testTable = document.querySelector('table');

    const table2json = (table,config)=>{
        const ths = table.querySelectorAll('th')
        if (!ths || !ths.length && !config.headers){
            throw new Error('Please provide header values if not in the table')
        }
        const preheaders = ths ? [...table.querySelectorAll('th')].map(th => th.innerText) : config.headers
        const headers = config.firstHeader ? [config.firstHeader, ...preheaders.splice(1)] : preheaders
        const trs = table.querySelectorAll('tr')
        const entries = [...trs].splice(1)
        return entries.reduce((acc, current) => {
            if (!current.children) return acc
            return [...acc, [...current.children].reduce((acc, current, index) => ({...acc, [headers[index]]: current.innerText}), {})]
        }, [])
    }

    // TODO
    const config = {
        headers: undefined,
        firstHeader: 'slot',
        mapHeader: a => a,
        filterLine: a => true
    }

    table2json(testTable, config)
}