d3.js - D3 mousedown在加载时触发

mousedown和mouseup在加载时触发，然后不再触发。我在这里做错了什么。任何提示赞赏。

-------- mousecrazy.js ----------

yesClick = function() {
    alert("always");
}

var svgbox = d3.select('body')
    .append('svg')
    .attr('width', 500)
    .attr('height', 250)
    .on("mousedown", yesClick())
    .on("mouseup", yesClick());

-------- mousecrazy.html ----------

<html>
<head>
    <script src='http://d3js.org/d3.v3.min.js'></script>
    <script src="js/mousecrazy.js"></script>
    <title>mousecrazy</title>
</head>
<body>

</body>
</html>

D3 mousedown在加载时触发

0 个答案: