JavaScript
(async () => {
const topology = await fetch(
'https://code.highcharts.com/mapdata/countries/gb/gb-eng-all.topo.json'
).then(response => response.json());
// Prepare demo data. The data is joined to map using value of 'hc-key'
// property by default. See API docs for 'joinBy' for more info on linking
// data and map.
const data = [
['gb-hef', 10], ['gb-stn', 11], ['gb-sfk', 12], ['gb-wsm', 13],
['gb-kec', 14], ['gb-lnd', 15], ['gb-twh', 16], ['gb-hck', 17],
['gb-hry', 18], ['gb-isl', 19], ['gb-cmd', 20], ['gb-bne', 21],
['gb-enf', 22], ['gb-hns', 23], ['gb-gre', 24], ['gb-bex', 25],
['gb-mrt', 26], ['gb-wnd', 27], ['gb-cry', 28], ['gb-ktt', 29],
['gb-hrt', 30], ['gb-nfk', 31], ['gb-rut', 32], ['gb-war', 33],
['gb-wil', 34], ['gb-con', 35], ['gb-bst', 36], ['gb-wor', 37],
['gb-sry', 38], ['gb-khl', 39], ['gb-wft', 40], ['gb-rdb', 41],
['gb-nel', 42], ['gb-som', 43], ['gb-ben', 44], ['gb-oxf', 45],
['gb-sos', 46], ['gb-thr', 47], ['gb-lin', 48], ['gb-nsm', 49],
['gb-bas', 50], ['gb-sgc', 51], ['gb-gls', 52], ['gb-cma', 53],
['gb-nbl', 54], ['gb-dur', 55], ['gb-nyk', 56], ['gb-lan', 57],
['gb-ery', 58], ['gb-esx', 59], ['gb-shf', 60], ['gb-rot', 61],
['gb-dnc', 62], ['gb-bns', 63], ['gb-nln', 64], ['gb-kir', 65],
['gb-wkf', 66], ['gb-swd', 67], ['gb-wnm', 68], ['gb-brc', 69],
['gb-wsx', 70], ['gb-bnh', 71], ['gb-wok', 72], ['gb-rdg', 73],
['gb-snd', 74], ['gb-wbk', 75], ['gb-slg', 76], ['gb-brd', 77],
['gb-cld', 78], ['gb-lds', 79], ['gb-ngm', 80], ['gb-por', 81],
['gb-sth', 82], ['gb-yor', 83], ['gb-sty', 84], ['gb-gat', 85],
['gb-nty', 86], ['gb-net', 87], ['gb-der', 88], ['gb-tam', 89],
['gb-man', 90], ['gb-slf', 91], ['gb-skp', 92], ['gb-trf', 93],
['gb-old', 94], ['gb-rch', 95], ['gb-bur', 96], ['gb-bol', 97],
['gb-wgn', 98], ['gb-wrt', 99],...