我正在尝试使用 dc.js 来实现 crossfilter 和 d3。我快成功了。当我在 JSFiddle 中运行我的代码时，它工作得很好!但是，当我尝试在本地系统上实现确切的代码时，它会给我 Uncaught TypeError: Cannot read property 'textContent' of null 错误。
我的代码是
trial1.js
var yearChart = dc.barChart('#year-chart');
//the data
var data = [
{date: "2015-10-01", type: "car", quantity: 3}];
var dispatch = crossfilter(data);
var parseDate = d3.time.format("%Y-%m-%d").parse;
data.forEach(function (d) {
d.date = parseDate(d.date);
d.quantity = +d.quantity;
d.Year = d.date.getFullYear();
});
var dateDim = dispatch.dimension(function (d) {
return d.date;
});
var productions = dateDim.group().reduceSum(function (d) {
return d.quantity;
});
var minDate = dateDim.bottom(1)[0].date;
var maxDate = dateDim.top(1)[0].date;
yearChart.width(2000).height(200)
.dimension(dateDim)
.group(productions)
.x(d3.time.scale().domain([minDate, maxDate]))
.brushOn(false)
.centerBar(true)
.yAxisLabel("Productions per day")
.xUnits(function(){return 10;});
yearChart.render();<html>
<head>
<meta charset="utf-8">
<script src="https:////cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js" charset="utf-8"></script>
<script type="text/javascript" src="https://dc-js.github.io/dc.js/js/d3.js"></script>
<script type="text/javascript" src="https://dc-js.github.io/dc.js/js/crossfilter.js"></script>
<script type="text/javascript" src="https://dc-js.github.io/dc.js/js/dc.js"></script>
<script type="text/javascript" src="https://dc-js.github.io/dc.js/js/colorbrewer.js"></script>
<script type="text/javascript" src = "trial1.js"></script>
</head>
<body>
<div id="year-chart"></div>
</body>
</html>d3.js 中出现错误的代码行是 this.node().textContent;
最佳答案
我遇到了同样的问题! 本地
刚刚发现:
<div id="year-chart"></div>
放错地方了!
只需尝试在 JS 文件之前设置所有您的 html 内容。并且会正常工作!
看例子:
obs:它在 JSFiddle 上工作，因为 html(必须)在 js 脚本之前呈现!
希望对你也有用。
<!DOCTYPE html>
<html lang="en">
<head>
<title>dc.js - Bar Chart Example</title>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="http://dc-js.github.io/dc.js/css/dc.css"/>
<script src="https:////cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js" charset="utf-8"></script>
<script src="http://dc-js.github.io/dc.js/js/d3.js" charset="utf-8"></script>
<script src="http://dc-js.github.io/dc.js/js/crossfilter.js"></script>
<script src="http://dc-js.github.io/dc.js/js/dc.js"></script>
</head>
<body>
<div id="year-chart"></div>
<script type="text/javascript">
var yearChart = dc.barChart('#year-chart');
//the data
var data = [{
date: "2015-10-01",
customer: "BOASG",
quantity: 3
}];
var dispatch = crossfilter(data);
var parseDate = d3.time.format("%Y-%m-%d").parse;
data.forEach(function (d) {
d.date = parseDate(d.date);
d.quantity = +d.quantity;
d.Year = d.date.getFullYear();
});
var dateDim = dispatch.dimension(function (d) {
return d.date;
});
var productions = dateDim.group().reduceSum(function (d) {
return d.quantity;
});
var minDate = dateDim.bottom(1)[0].date;
window.alert(minDate);
var maxDate = dateDim.top(1)[0].date;
window.alert(maxDate);
yearChart.width(2000).height(200)
.dimension(dateDim)
.group(productions)
.x(d3.time.scale().domain([minDate, maxDate]))
.brushOn(false)
.centerBar(true)
.yAxisLabel("Productions per day")
.xUnits(function () {
return 10;
});
dc.renderAll();
</script>
<!-- <div id="year-chart"></div> if you set the code here you will be able to reproduce the issue.-->
</body>
</html>关于javascript - 未捕获的类型错误 : Cannot read property 'textContent' of null error，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32973616/