21 lines
708 B
Markdown
21 lines
708 B
Markdown
## Error Handling
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Most of the errors fired by the library are handled by the client itself. The client will trigger a `CartoError` every time an error happens.
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A cartoError is an object containing a single `message` field with a string explaining the error.
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Some methods in CARTO.js are asynchronous. This means that they return a promise that will be fulfilled when the asynchronous work is done or rejected with a `CartoError` when an error occurs.
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```javascript
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// All errors are passed to the client.
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client.on(carto.events.ERROR, cartoError => {
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console.error(cartoError.message):
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})
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// .addLayer() is async.
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client.addLayer(newLayer)
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.then(successCallback)
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.catch(errorCallback);
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```
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