This works:
<div id="chart"></div>
<script>var svg = d3.select("#chart").append("svg:svg");</script>
This doesn't:
<script>var svg = d3.select("#chart").append("svg:svg");</script>
<div id="chart"></div>
I tried wrapping the code in a jquery document.ready(), grabbing the element with jquery, and passing it into d3.select, but that didn't work either. Edit Once I got the jquery document.ready() syntax right, it worked.
Any way I can include the javascript at the top of the page and still select an element below? Thanks.
This question is related to
d3.js
<script>$(function(){var svg = d3.select("#chart").append("svg:svg");});</script>
<div id="chart"></div>
In other words, it's not happening because you can't query against something that doesn't exist yet-- so just do it after the page loads (here via jquery).
Btw, its recommended that you place your JS files before the close of your body tag.
Use jQuery $(document) function...
$(document).ready(function(){
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x0 = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var x1 = d3.scale.ordinal();
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var xAxis = d3.svg.axis()
.scale(x0)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickFormat(d3.format(".2s"));
//d3.select('#chart svg')
//d3.select("body").append("svg")
//var svg = d3.select("#chart").append("svg:svg");
var svg = d3.select("#BarChart").append("svg:svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var updateData = function(getData){
d3.selectAll('svg > g > *').remove();
d3.csv(getData, function(error, data) {
if (error) throw error;
var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });
data.forEach(function(d) {
d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
});
x0.domain(data.map(function(d) { return d.State; }));
x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Population");
var state = svg.selectAll(".state")
.data(data)
.enter().append("g")
.attr("class", "state")
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.attr("width", x1.rangeBand())
.attr("x", function(d) { return x1(d.name); })
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); })
.style("fill", function(d) { return color(d.name); });
var legend = svg.selectAll(".legend")
.data(ageNames.slice().reverse())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", width - 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });
});
}
updateData('data1.csv');
});
Please try this approach. It worked for me.
<head>
<script type="text/javascript" src='./d3.v4.min.js'></script>
</head>
<body>
<div id="jschart41448" style="color:red">
Hi red
</div>
<div id="jschart41449" style="color:blueviolet">
Hi blueviolet
</div>
<script type="text/javascript" >
d3.select("#jschart41448").style('color', 'green' , null);
d3.select("#jschart41449").style('color', 'yellow', null);
</script>
</body>
I just found out that if your element id is just a number, then d3.select("1234"), will not work.
The unique id needs to be an alpha-numeric character.
d3.select("1234")
d3.select("container1234")
just add your <script src="./custom.js"></script> before </bod> tag. that is supply time to d3.select(#chart) detect your #chart element in html body
Not enough reputation to comment yet so I'll just put this here:
To expand on Micah's answer - the browser runs your code top to bottom, so if you write:
<div id="chart"></div>
<script>var svg = d3.select("#chart").append("svg:svg");</script>
The browser will create a div with id "chart", and then run your script, which will try to find that div, and, hurray, success.
Otherwise if you write:
<script>var svg = d3.select("#chart").append("svg:svg");</script>
<div id="chart"></div>
The browser runs your script, and tries to find a div with id chart, but it hasn't been created yet so it fails.
THEN the browser creates a div with id "chart".
Source: Stackoverflow.com