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freecodecamp-projects/4-data-visualization/2-scatterplot/index.js

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const w = 900
const h = 500
d3.select('#chart')
.append('svg')
.attr('height', h)
.attr('width', w)
d3.json('https://raw.githubusercontent.com/freeCodeCamp/ProjectReferenceData/master/cyclist-data.json')
.then(data => {
const dates = [];
data.map((i) => {
i = i.Time.split(':');
dates.push(new Date(1970, 1, 1, 0, i[0], i[1]))
})
console.log(dates)
const xScale = d3.scaleLinear()
.domain([d3.min(data.map((i) => i.Year)), d3.max(data.map((i) => i.Year))])
.range([0, w])
.nice()
const yScale = d3.scaleTime()
.domain([d3.max(dates), d3.min(dates)])
.range([h, 0])
.nice()
const xAxis = d3.axisBottom().scale(xScale)
.tickFormat(d3.format('d'))
const yAxis = d3.axisLeft().scale(yScale)
.tickFormat(d3.timeFormat('%M:%S'))
d3.select('svg')
.append('g')
.call(xAxis)
.attr('id', 'x-axis')
.attr('transform', 'translate(40, 450)')
d3.select('svg')
.append('g')
.call(yAxis)
.attr('id', 'y-axis')
.attr('transform', 'translate(40, -50)')
d3.select('svg')
.selectAll('circle')
.data(data)
.enter()
.append('circle')
.attr('class', 'dot')
.attr('cx', (d) => xScale(d.Year) + 40)
.attr('cy', (d, i) => yScale(dates[i]) - 50)
.attr('data-xvalue', (d) => d.Year)
.attr('data-yvalue', (d, i) => (dates[i]))
.attr('data-name', (d) => d.Name)
.attr('data-doping', (d) => d.Doping)
.attr('data-url', (d) => d.URL)
.attr('r', 5)
.on('mouseover', (e) => {
console.log(e)
d3.select('#tooltip')
.style('display', 'initial')
.style('left', e.pageX + 'px')
.style('top', e.pageY + 30 + 'px')
.attr('data-year', e.target.attributes['data-xvalue'].nodeValue)
.html(
'<a href="' + e.target.attributes['data-url'].nodeValue + '">Name: ' + e.target.attributes['data-name'].nodeValue + '</a><br>' +
e.target.attributes['data-doping'].nodeValue
)
})
.on('mouseout', () => {
d3.select('#tooltip')
.style('display', 'none')
})
}
)