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<!DOCTYPE html>
<html>
<head>
<title>Offline Editing with the ArcGIS API for JavaScript</title>
<title>Offline Editing and Mapping with the ArcGIS API for JavaScript</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
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</body>
<a href="https://github.com/ArcGIS/offline-editor-js"><img style="position: absolute; top: 0; right: 0; border: 0;"
src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_ff7600.png" alt="Fork me on GitHub"></a>
<h1 class="title">ArcGIS Offline Editing Library for JavaScript</h1>
<p>This is an experimental library for exploring offline editing use cases and workflows when using ArcGIS Feature Services. Use it in conjunction
with the ArcGIS API for JavaScript.</p>
<h1 class="title">ArcGIS Offline Library for JavaScript</h1>
<p>JavaScript toolkit for using the ArcGIS API for JavaScript offline. It manages both editing and tiles in an offline mode. It's still a work-in-progress
so if you have suggestions open an issue or if you want to make a pull request we welcome your proposed modifications.</p>
<p>This repo contains two libraries: </p>
<ul>
<li><b>/edit</b>: handles vector features and stores adds, updates and deletes while offline. Resync's edits with server once connection is reestablished</li>
<ul>
<li><b>offlineFeaturesManager</b> - Extends and overrides a feature layer. </li>
<li><b>editsStore</b> - Provides static helper methods for working with the offline data store.</li>
</ul>
<li><b>/tiles</b>: stores portions of tiled maps client-side and uses the cached tiles when device is offline</li>
<ul>
<li><b>offlineTilesEnabler</b> - Extends and overrides a tiled map service.</li>
</ul>
</ul>
<p><b>Why edit offline with JavaScript?</b></p>
<p>Many "in the field" use cases for mapping apps require that workers go into areas with limited, intermittent or no cellular network connectivity.
Until now, offline has been limited to native SDKs on smartphones and tablets. This library will hopefully lead the way in changing
that perception.</p>
<p><b>What types of features will it work with?</b></p>
<p>The library currently works with esri.geometry.Geometry.Point, Polygon and Polyline.</p>
<p><b>How does it work?</b></p>
<p>It takes the place of the existing esri.layers.FeatureLayer.applyEdit() function. When an edit is being submitted, the library automatically detects if the app is online or offline.
If the app is online then edits are simply passed through. If an offline condition occurs, then the library will start storing changes.
In the background it will re-check the internet connection on a regular basis. Once the internet is restored, the library will handle resubmitting
any editing changes made offline.</p>
<p>The library also contains a built-in indexing system that allows for tracking and validation of edits. The index keeps track of whether or not
and edit was successfully transmitted and received by the Feature Service. </p>
<pre><code>
//Instantiate the OfflineStore library and pass it a reference to the map.
offlineStore = new OfflineStore(map);
//To delete a feature listen for control-click event on the layer
pointFeatureLayer.on("click", function(evt) {
event.stop(evt);
if (evt.ctrlKey === true || evt.metaKey === true) {
try{
offlineStore.applyEdits(evt.graphic,pointFeatureLayer,offlineStore.enum().DELETE);
}
catch(err){
console.log("error " + err.stack);
}
}
});
</code></pre>
<!--<pre><code>-->
<!--//Instantiate the OfflineStore library and pass it a reference to the map.-->
<!--offlineStore = new OfflineStore(map);-->
<!--</code></pre>-->
<p><b>What platforms will it work on?</b></p>
<p>Currently it's only been thoroughly tested on Firefox v23. Firefox has a built-in offline capability that is extremely easy to use.
However, there are other 3rd party offline plugins for Chrome, etc. that need to be tried out.</p>
<p class="banner"><b>Get involved</b></p>
We are always looking to make our projects the best they can possibly be. You can help immensely by providing any and all feedback related to the libraries functionality
bugs, and documentation.
<br>
<br>
</html>