其他的鼠标事件影响了pointerclick,在new joint.dia.Paper时设置clickThreshod属性为1(或是大于0的数字),允许其他鼠标事件之后仍触发pointerclick事件。
// Allowed number of mousemove events after which the pointerclick event will be still triggered. clickThreshold: 0,
var paper = new joint.dia.Paper({ //... other settings clickThreshold: 1 //or any number > 0 if you have more specific events there })