我正在尝试将 D3 与 JSON 文件结合使用来创建和显示树状图。很简单,只是为了好玩而尝试 D3。但是,在我将 tree.js
放在一起并运行脚本后,我得到了一个空白页面。控制台说
XMLHttpRequest cannot load file:///Users/aczre/Desktop/d3TestApp/shreleases.json.
Cross origin requests are only supported for HTTP.
Uncaught TypeError: Cannot read property 'children' of null d3.v2.js:6081
d3_layout_hierarchyChildren d3.v2.js:6081
recurse d3.v2.js:5990
hierarchy d3.v2.js:6033
tree d3.v2.js:6384
object.nodes d3.v2.js:6074
(anonymous function) tree.js:17
d3.json d3.v2.js:514
ready d3.v2.js:504
d3.xhr.req.onreadystatechange d3.v2.js:497
d3.xhr d3.v2.js:500
d3.text d3.v2.js:510
d3.json d3.v2.js:513
(anonymous function) tree.js:16
Uncaught Error: NETWORK_ERR: XMLHttpRequest Exception 101 d3.v2.js:500
d3.xhr d3.v2.js:500
d3.text d3.v2.js:510
d3.json d3.v2.js:513
(anonymous function) tree.js:16
不确定我做错了什么...这是我的 tree.js
var width = 960,
height = 2000;
var tree = d3.layout.tree()
.size([height, width - 160]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var vis = d3.select("#chart").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(40, 0)");
d3.json("shreleases.json", function(json) { // Line 16
var nodes = tree.nodes(json);
var link = vis.selectAll("path.link")
.data(tree.links(nodes))
.enter().append("path")
.attr("class", "link")
.attr("d", diagonal);
var node = vis.selectAll("g.node")
.data(nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })
node.append("circle")
.attr("r", 4.5);
node.append("text")
.attr("dx", function(d) { return d.children ? -8 : 8; })
.attr("dy", 3)
.attr("text-anchor", function(d) { return d.children ? "end" : "start"; })
.text(function(d) { return d.name; });
});
我试着坚持 D3 网站上列出的示例,https://github.com/mbostock/d3/wiki/Gallery 但我不确定我是否完全理解语法。
最佳答案
在 chrome 中你可以告诉它允许本地文件访问,所以你不需要服务器,例如
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" -allow-file-access-from-files
关于javascript - D3 不会加载 Tree Map,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11446498/