Parse Github labels to JSON file

parse_github_labels.js

var labels = [];

var hexDigits = ["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"];

//Function to convert rgb color to hex format
function rgb2hex(rgb) {
    rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
    return "#" + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
}

function hex(x) {
    return isNaN(x) ? "00" : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
}
[].slice.call(document.querySelectorAll(".js-label-link"))
    .forEach(function(element) {
        labels.push({
            name: element.textContent.trim(),
            description: element.getAttribute("title"),
            // using style.backgroundColor might returns "rgb(...)"
            color: rgb2hex(window.getComputedStyle(element)
                .backgroundColor)
        })
    })

console.log(JSON.stringify(labels, null, 2))