d3js bars not updating properly - d3.js

Question

I created this bars with a tooltip. I need to get them update after the $('.quarter-increase, .quarter-decrease').on('click', function() {
I don't get any errors but nothing gets updated...
$(document).ready(function() {
$('#prof-rendi').click(function() {
$('.graph-loading').show();
$('#svg-quarter').empty();
var tooltip = tooltipd3();
var svg = d3.select("svg#svg-quarter"),
margin = {
top: 20,
right: 20,
bottom: 30,
left: 40
},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
var x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
y = d3.scaleLinear().rangeRound([height, 0]);
var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var div = d3.select("#svg-quarter").append("div"). // declare the tooltip div
attr("class", "tooltip"). // apply the 'tooltip' class
style("opacity", 0);
d3.csv(base_url() + 'graph/getStatementsQuarterly/', function(d) {
$('.graph-loading').hide();
d.guadagno = +d.guadagno;
return d;
}, function(error, data) {
if (error)
throw error;
x.domain(data.map(function(d) {
return d.periodo;
}));
y.domain([
0,
d3.max(data, function(d) {
return d.guadagno;
})
]);
g.append("g").attr("class", "axis axis--x").attr("transform", "translate(0," + height + ")").call(d3.axisBottom(x));
g.append("g").attr("class", "axis axis--y").call(d3.axisLeft(y).ticks(10)).append("text").attr("transform", "rotate(-90)").attr("y", 6).attr("dy", "0.71em").attr("text-anchor", "end").text("Guadagno")
g.selectAll(".bar").data(data).enter().append("rect").attr("class", "bar").attr("x", function(d) {
return x(d.periodo);
}).attr("y", function(d) {
return y(d.guadagno);
}).attr("width", x.bandwidth()).attr("height", function(d) {
return height - y(d.guadagno);
}).on('mouseover', function(d) {
var html = '<h5>' + d.guadagno + ' €</h5>';
tooltip.mouseover(html); // pass html content
}).on('mousemove', tooltip.mousemove).on('mouseout', tooltip.mouseout);
});
});
$('.quarter-increase, .quarter-decrease').on('click', function() {
$('.rendi-btn.left, .rendi-btn.right').attr('disabled', 'disabled');
var where_at = $('#scroll-statement-quarter').val();
$('.graph-loading').show();
$('#svg-quarter').css({'opacity': 0.4});
var tooltip = tooltipd3();
var svg = d3.select("svg#svg-quarter"),
margin = {
top: 20,
right: 20,
bottom: 30,
left: 40
},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
var x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
y = d3.scaleLinear().rangeRound([height, 0]);
var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var div = d3.select("#svg-quarter").append("div"). // declare the tooltip div
attr("class", "tooltip"). // apply the 'tooltip' class
style("opacity", 0);
var speed = 500;
d3.csv(base_url() + 'graph/getStatementsQuarterly/' + where_at, function(d) {
$('.graph-loading').hide();
d.guadagno = +d.guadagno;
return d;
}, function(error, data) {
if (error)
throw error;
x.domain(data.map(function(d) {
return d.periodo;
}));
y.domain([
0,
d3.max(data, function(d) {
return d.guadagno;
})
]);
g.append("g").attr("class", "axis axis--x").attr("transform", "translate(0," + height + ")").call(d3.axisBottom(x));
g.append("g").attr("class", "axis axis--y").call(d3.axisLeft(y).ticks(10)).append("text").attr("transform", "rotate(-90)").attr("y", 6).attr("dy", "0.71em").attr("text-anchor", "end").text("Guadagno")
g.selectAll(".bar").data(data).transition().duration(speed).attr("class", "bar").attr("x", function(d) {
return x(d.periodo);
}).attr("y", function(d) {
return y(d.guadagno);
}).attr("width", x.bandwidth()).attr("height", function(d) {
return height - y(d.guadagno);
}).on('mouseover', function(d) {
var html = '<h5>' + d.guadagno + ' €</h5>';
tooltip.mouseover(html); // pass html content
}).on('mousemove', tooltip.mousemove).on('mouseout', tooltip.mouseout);
});
})
});
This is a Plunker to test this:
https://plnkr.co/edit/72GCWqkllMFXZI6mecQE?p=preview
Press "show", then change the year to 2016 and you will see the result.

Answer 1

Your g variable inside the click event handler is a newly appended <group> element.
Therefore, this...
g.selectAll(".bar").data(data).etc...
... won't work, because there is nothing with a class .bar inside that group.
Solution: use the svg variable to select the rectangles:
svg.selectAll(".bar").data(data).etc...
Here is the updated plunker: https://plnkr.co/edit/eNa6Af0WcyrcLejadO2q?p=preview
PS: this code has several problems. I strongly advise you to not mix jQuery and D3, and also to not use d3.csv inside an event handler.