You can use the graphicsUtils graphicsExtent method which takes an array of graphics and returns an extent you can use to set the map's extent. Here's an example.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
<title>Simple Map</title>
<link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">
<style>
html, body, #map {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
body {
background-color: #FFF;
overflow: hidden;
font-family: "Trebuchet MS";
}
</style>
<script src="http://js.arcgis.com/3.10/"></script>
<script>
var map, csv;
require([
"esri/map",
"esri/layers/CSVLayer",
"esri/Color",
"esri/symbols/SimpleMarkerSymbol",
"esri/renderers/SimpleRenderer",
"esri/InfoTemplate",
"esri/urlUtils",
"esri/graphicsUtils",
"dojo/domReady!"
], function(
Map, CSVLayer, Color, SimpleMarkerSymbol, SimpleRenderer, InfoTemplate, urlUtils, graphicsUtils
) {
map = new Map("map", {
basemap: "gray",
center: [ -60, -10 ],
zoom: 4
});
csv = new CSVLayer("2.5_week.csv", {
copyright: "USGS.gov"
});
var orangeRed = new Color([238, 69, 0, 0.5]); // hex is #ff4500
var marker = new SimpleMarkerSymbol("solid", 15, null, orangeRed);
var renderer = new SimpleRenderer(marker);
csv.setRenderer(renderer);
var template = new InfoTemplate("${type}", "${place}");
csv.setInfoTemplate(template);
csv.on("update-end", function(){
var graphics = graphicsUtils.graphicsExtent(csv.graphics);
map.setExtent(graphics);
});
map.addLayer(csv);
});
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>
