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Edited
Sep 19, 2021
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md`# bitcoin historical data`
md`## y: ${percentOnYear} 6m: ${percentOnSixMonth}
## 3m: ${percentOnThreeMonth} 1m: ${percentOnMonth}
## w: ${percentOnWeek} w/7: ${(percentOnWeek / 7).toFixed(2)}
## d: ${percentOnDay} %`
hist = fetch('https://api.coindesk.com/v1/bpi/historical/close.json').then(resp => resp.json())
currentPrice = fetch('https://api.coindesk.com/v1/bpi/currentprice.json').then(resp => resp.json())
current = currentPrice.bpi.USD.rate_float
Object.keys(hist.bpi)[0]
today = new Date()
dateFns = await require('https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.js');
yesterday = dateFns.subDays(today, 1)
weekAgo = dateFns.subDays(today, 7);
monthAgo = dateFns.subMonths(today, 1);
threeMonthAgo = dateFns.format(dateFns.subMonths(today, 3), 'YYYY-MM-DD')
sixMonthAgo = dateFns.format(dateFns.subMonths(today, 6), 'YYYY-MM-DD')
lastYear = dateFns.format(dateFns.subYears(today, 1), 'YYYY-MM-DD')
lastYearBpi = fetch(`https://api.coindesk.com/v1/bpi/historical/close.json?start=${lastYear}&end=${lastYear}`).then(resp => resp.json())
sixMonthBpi = fetch(`https://api.coindesk.com/v1/bpi/historical/close.json?start=${sixMonthAgo}&end=${sixMonthAgo}`).then(resp => resp.json())
threeMonthBpi = fetch(`https://api.coindesk.com/v1/bpi/historical/close.json?start=${threeMonthAgo}&end=${threeMonthAgo}`).then(resp => resp.json())
priceLastYear = lastYearBpi.bpi[lastYear]
priceSixMonthAgo = sixMonthBpi.bpi[sixMonthAgo]
priceThreeMonthAgo = threeMonthBpi.bpi[threeMonthAgo]
priceMonthAgo = hist.bpi[dateFns.format(monthAgo, 'YYYY-MM-DD')]
priceWeekAgo = hist.bpi[dateFns.format(weekAgo, 'YYYY-MM-DD')]
priceYesterday = hist.bpi[dateFns.format(yesterday, 'YYYY-MM-DD')]
md`percents`
percentOnYear = ((current - priceLastYear) / priceLastYear * 100).toFixed(2)
percentOnSixMonth = ((current - priceSixMonthAgo) / priceSixMonthAgo * 100).toFixed(2)
percentOnThreeMonth = ((current - priceThreeMonthAgo) / priceThreeMonthAgo * 100).toFixed(2)
percentOnDay = ((current - priceYesterday) / priceYesterday * 100).toFixed(2)
percentOnWeek = ((current - priceWeekAgo) / priceWeekAgo * 100).toFixed(2)
percentOnMonth = ((current - priceMonthAgo) / priceMonthAgo * 100).toFixed(2)
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
