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XMLHttpRequest無法加載file:///C:/Users/HP/Desktop/tree.json。交叉來源請求僅支持協議方案：http, data, chrome, chrome-extension, https, chrome-extension-resource。雖然使用d3js我的json文件沒有讀到有錯誤
我的代碼是
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
text {
font-family:"Helvetica Neue", Helvetica, sans-serif;
}
.name {
font-weight: bold;
}
.about {
fill: #777;
font-size: smaller;
}
.link {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</style>
</head>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {
top: 0,
right: 320,
bottom: 0,
left: 0
},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var tree = d3.layout.tree()
.separation(function(a, b) {
return a.parent === b.parent ? 1 : .5;
})
.children(function(d) {
return d.parents;
})
.size([height, width]);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json(" tree.json", function(error, json) {
if (error) throw error;
var nodes = tree.nodes(json);
var link = svg.selectAll(".link")
.data(tree.links(nodes))
.enter().append("path")
.attr("class", "link")
.attr("d", elbow);
var node = svg.selectAll(".node")
.data(nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
})
node.append("text")
.attr("class", "name")
.attr("x", 8)
.attr("y", -6)
.text(function(d) {
return d.name;
});
node.append("text")
.attr("x", 8)
.attr("y", 8)
.attr("dy", ".71em")
.attr("class", "about lifespan")
.text(function(d) {
return d.born + "–" + d.died;
});
node.append("text")
.attr("x", 8)
.attr("y", 8)
.attr("dy", "1.86em")
.attr("class", "about location")
.text(function(d) {
return d.location;
});
});
function elbow(d, i) {
return "M" + d.source.y + "," + d.source.x + "H" + d.target.y + "V" + d.target.x + (d.target.children ? "" : "h" + margin.right);
}
</script>
和json
{
"name": "Clifford Shanks",
"born": 1862,
"died": 1906,
"location": "Petersburg, VA",
"parents": [{
"name": "James Shanks",
"born": 1831,
"died": 1884,
"location": "Petersburg, VA",
"parents": [{
"name": "Robert Shanks",
"born": 1781,
"died": 1871,
"location": "Ireland/Petersburg, VA"
}, {
"name": "Elizabeth Shanks",
"born": 1795,
"died": 1871,
"location": "Ireland/Petersburg, VA"
}]
}, {
"name": "Ann Emily Brown",
"born": 1826,
"died": 1866,
"location": "Brunswick/Petersburg, VA",
"parents": [{
"name": "Henry Brown",
"born": 1792,
"died": 1845,
"location": "Montgomery, NC"
}, {
"name": "Sarah Houchins",
"born": 1793,
"died": 1882,
"location": "Montgomery, NC"
}]
}]
}