I am currently working on creating a bar chart using D3 in Angular4.
// Enter Phase
this.chart.selectAll('.bar')
.data(this.barData)
.enter()
.append('rect')
.attr('class', 'bar');
// Update Phase
let bars = this.chart.selectAll('.bar').transition()
.attr('x', (d) => {return this.x(this.parseTime(d.date.toUpperCase()));})
.attr('y', (d) => {return this.y(d.point)})
.attr('width', 15)
.attr('height', (d) => {return this.charDimensions.height - this.y(d.point);})
.on("mouseover", function (d) {D3.select(this).style('opacity', 0.5);})
.on("mouseout", function (d) {D3.select(this).style('opacity', 1);})
.on("click", (d) => {this.barClicked.emit(d);});
// Exit phase
this.chart.selectAll('.bar')
.data(this.barData)
.exit().remove();
While implementing my plotting method, I encountered an issue where calling animate() resulted in the error: Error: unknown type: mouseover. This is likely due to attempting to apply the on("<event>") method on a transition object returned by D3. The transition effect works, but everything after it breaks, causing incorrect plotting.
When trying the following instead:
// Update Phase
let bars = this.chart.selectAll('.bar');
bars.transition();
bars.attr('x', (d) => {return this.x(this.parseTime(d.date.toUpperCase()));})
.attr('y', (d) => {return this.y(d.point)})
.attr('width', 15)
.attr('height', (d) => {return this.charDimensions.height - this.y(d.point);})
.on("mouseover", function (d) {D3.select(this).style('opacity', 0.5);})
.on("mouseout", function (d) {D3.select(this).style('opacity', 1);})
.on("click", (d) => {this.barClicked.emit(d);});
No errors are thrown, but there is no transition effect applied to the new dataset.