34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
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title: Sending and Receiving messages
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layout: docs
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---
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### listening to messages
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<pre><code class="javascript">EmbarkJS.Messages.listenTo({topic: ["topic1", "topic2"]}).then(function(message) {
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console.log("received: " + message);
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})
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</code></pre>
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### sending messages
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You can send plain text
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<pre><code class="javascript">EmbarkJS.Messages.sendMessage({topic: "sometopic", data: 'hello world'})
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</code></pre>
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Or an object
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<pre><code class="javascript">EmbarkJS.Messages.sendMessage({topic: "sometopic", data: {msg: 'hello world'}})
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</code></pre>
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Note: array of topics are considered an AND. In Whisper you can use another array for OR combinations of several topics e.g ``["topic1", ["topic2", "topic3"]]`` => ``topic1 AND (topic2 OR topic 3)``
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### Setup
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By default Embark will automatically initialize EmbarkJS with the provider configured at `config/communication.js`. However if you are using EmbarkJS directly or wish to change the provider configuration on the fly you can do:
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<pre><code class="javascript">EmbarkJS.Messages.setProvider('whisper')
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</code></pre>
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