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script.js
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script.js
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let countyURL = 'https://cdn.freecodecamp.org/testable-projects-fcc/data/choropleth_map/counties.json'
let educationURL = 'https://cdn.freecodecamp.org/testable-projects-fcc/data/choropleth_map/for_user_education.json'
let countyData
let educationData
let canvas = d3.select('#canvas')
let tooltip = d3.select('#tooltip')
let drawMap = () => {
canvas.selectAll('path')
.data(countyData)
.enter()
.append('path')
.attr('d', d3.geoPath())
.attr('class', 'county')
.attr('data-fips', (item) => {
return item['id']
})
.attr('data-education', (item) => {
let fips = item['id']
let county = educationData.find((county) => {
return county['fips'] === fips
})
let percentage = county['bachelorsOrHigher']
return percentage
})
.attr('fill', (item) => {
let fips = item['id']
let county = educationData.find((county) => {
return county['fips'] === fips
})
let percentage = county['bachelorsOrHigher']
if (percentage <= 15){
return 'tomato'
}else if (percentage <= 30){
return 'orange'
} else if (percentage <= 45){
return 'lightgreen'
} else {
return 'limegreen'
}
})
.on('mouseover', (countyDataItem) => {
tooltip.transition()
.style('visibility', 'visible')
let fips = countyDataItem['id']
let county = educationData.find((county) => {
return county['fips'] === fips
})
tooltip.text(county['fips'] + ' - ' + county['area_name'] + ', ' +
county['state'] + ' : ' + county['bachelorsOrHigher'] + '%')
tooltip.attr('data-year', item['year'])
})
.on('mouseout', (countyDataItem) => {
tooltip.transition()
.style('visibility', 'hidden')
})
}
d3.json(countyURL).then(
(data, error) => {
if(error){
console.log(error)
}else{
countyData = data
countyData = topojson.feature(countyData, countyData.objects.counties).features
console.log('County Data')
console.log(countyData)
d3.json(educationURL).then(
(data, error) => {
if(error){
console.log(error)
}
else{
educationData = data
console.log('Education Data')
console.log(educationData)
drawMap()
}
}
)
}
}
)