get total count lines for repo during 1 week

github-week-stats.js

//replace jquery/jquery with the repo you're interested in
fetch('https://api.github.com/repos/jquery/jquery/stats/contributors')
    .then(response => response.json())
    .then(contributors => contributors
        .map(contributor => contributor.weeks
            .reduce((lineCount, week) => lineCount + week.a - week.d, 0)))
    .then(lineCounts => lineCounts.reduce((lineTotal, lineCount) => lineTotal + lineCount))
    .then(lines => window.alert(lines));