There are couple of issues found inbook.

[mutantkeyboard]

First of all, the code in chapter two for filter uses dim instead of dims, so the updated code should be

export default async function lifeExpectancyTable() {
    const getData = async() => {
        try{
            const response = await fetch('data/data.json');
            const raw = await response.json(); 
            // pay attention to the dims, and not dim
            return raw.fact.filter(d => d.dims.GHO === 'Life expectancy at birth (years)'
        && d.dims.SEX === 'Both sexes' && d.dims.YEAR === '2014')
        .map(d => [
            d.dims.COUNTRY,
            d.Value,
        ]);

        } catch (e) {
            console.error(e);
            return undefined;
        }
    };
    const data = await getData();

    data.unshift(['Country', 'Life expectancy (years from birth)']);
    return tableFactory(data);

}

However, the datatable is shown with the values, but not headers which are shown as 0 and 1.