dispatch
HTML
<select>
<option value="AL">AL</option>
<option value="AL1">AL1</option>
</select>
JavaScript
var dispatcher = d3.dispatch("someEvent", "someEvent2");
dispatcher.on("someEvent.a", function (d) {
console.log(d + d);
})
dispatcher.on("someEvent.b", function (d) {
console.log(d);
})
d3.select("select").on("change", function() {
dispatcher.someEvent(this.value);
//dispatch.statechange(stateById.get(this.value));
});