{
// the data is generated from a function that returns a new data set for each example
const players = generatePlayers()
const svg = d3.create('svg')
.attr('width', 300)
.attr('height', 300)
while(true) {
svg.selectAll('text')
.data( players.slice(0,10) )
.join('text')
.attr('transform', (d,i) => `translate(${ 10 },${ i * 30 })`)
.attr('x', 5)
.attr('dy', '1.25em')
.style('font-size', 14)
.style('font-family', 'sans-serif')
.text(d => d.name)
// randomizeScores assigns each player's score to a random number
randomizeScores( players )
yield svg.node()
// This loop repeats every 2 seconds
await Promises.tick(2000)
}
}
{
const players = generatePlayers()
const svg = d3.create('svg')
.attr('width', 300)
.attr('height', 300)
while(true) {
svg.selectAll('text')
.data( players.slice(0,10), player => player.name )
.join(
enter => enter.append('text')
.attr('transform', (d,i) => `translate(${ 10 },${ i * 30 })`)
.attr('x', 5)
.attr('dy', '1.25em')
.style('font-size', 14)
.style('font-family', 'sans-serif')
.style('fill', 'blue')
.text(d => d.name),
update => update
.attr('transform', (d,i) => `translate(${ 10 },${ i * 30 })`)
.style('fill', 'black')
)
yield svg.node()
randomizeScores(players, 50)
await Promises.tick(2000)
}
}
{
const players = generatePlayers()
const svg = d3.create('svg')
.attr('width', 300)
.attr('height', 300)
while(true) {
svg.selectAll('text')
.data( players.slice(0,10), d => d.name )
.join(
enter => enter.append('text')
.attr('transform', (d,i) => `translate(${ 10 },${ i * 30 })`)
.attr('x', 5)
.attr('dy', '1.25em')
.style('font-size', 14)
.style('font-family', 'sans-serif')
.style('fill', 'blue')
.style('opacity', 0)
.text(d => d.name)
.transition().duration(1000)
.style('opacity', 1)
// Note that as of v6, we have to call .selection() here
// This is because without it, we are returning the transition we've created,
// but selection.join() requires us to return a selection for enter and update groups
// (but not exit groups)
.selection()
,
update => update
.transition().duration(1000)
.attr('transform', (d,i) => `translate(${ 10 },${ i * 30 })`)
.style('fill', 'black')
.selection(),
exit => exit
.style('fill', 'red')
.transition().duration(1000)
.attr('transform', (d,i) => `translate(${ 100 },${ i * 30 })`)
.remove()
)
yield svg.node()
randomizeScores(players, 50)
await Promises.tick(2000)
}
}
{
const players = generatePlayers(),
colors = color( players )
const svg = d3.create('svg')
.attr('width', 300)
.attr('height', 310)
while(true) {
svg.selectAll('g')
.data( players.slice(0,11), d => d.name )
.join(
enter => enterRects(enter),
update => updateRects(update),
exit => exitRects(exit)
)
yield svg.node()
updateScores(players)
await Promises.tick(3000)
}
function enterRects(enter) {
enter.append('g')
.attr('transform', (d,i) => `translate(${ 10 },${ 350 })`)
.style('opacity', 0)
.call(g => g
.transition().duration(1000)
.attr('transform', (d,i) => `translate(${ 10 },${ 10 + i * 30 })`)
.style('opacity', 1)
)
.call(g =>
g.append('rect')
.attr('width', 280)
.attr('height', 25)
.style('fill', (d,i) => {
if( i == 0 ) return 'gold'
else if( i == 1 ) return 'silver'
else if ( i == 2 ) return '#cd7f32'
else return colors( d.name )
})
.style('opacity', 0.8)
.attr('rx', 3)
)
.call(g =>
g.append('text')
.attr('x', 5)
.attr('dy', '1.2em')
.style('font-size', 14)
.style('font-family', 'sans-serif')
.text(d => `${ d.name } - ${ d.score }`)
.raise()
)
}
function updateRects(update) {
update
.call(g => g
.transition().duration(1000)
.attr('transform', (d,i) => `translate(${ 10 },${ 10 + i * 30 })`)
)
.call(g => g.select('text')
.text(d => `${ d.name } - ${ d.score }`)
)
.call(g => g.select('rect')
.transition().duration(1000)
.style('fill', (d,i) => {
if( i == 0 ) return 'gold'
else if( i == 1 ) return 'silver'
else if ( i == 2 ) return '#cd7f32'
else return colors( d.name )
})
)
}
function exitRects(exit) {
exit
.call(g =>
g.transition().duration(1000)
.attr('transform', (d,i) => `translate(${ 10 },${ 350 })`)
.style('opacity', 0)
.remove()
)
}
}
color = (players) => d3.scaleOrdinal(
players.map(player => player.name),
d3.quantize( d3.interpolateRdYlGn, players.length )
)
updateScores = (players, stdDev) => {
players.forEach(d => d.score += Math.floor(d3.randomNormal(100, stdDev || 10)()/10))
players.sort((a,b) => b.score - a.score)
}
randomizeScores = (players, stdDev) => {
players.forEach(d => d.score = Math.floor(d3.randomNormal(100, stdDev || 10)()/10))
players.sort((a,b) => b.score - a.score)
}
generatePlayers = () => d3.range(30).map(d => ({
name: `Player ${ d }`,
score: 0
}))
d3 = require('d3@6')
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