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Execution Context API

The execution context provides access to node inputs, outputs, and data during execution.

Context Methods

getInput(socketName)

Get input value from a socket.

function myNodeFunction(context) {
  const value = context.getInput('inputSocket');
  // Process value...
}

setOutput(socketName, value)

Set output value for a socket.

function myNodeFunction(context) {
  const result = processData(context.getInput('input'));
  context.setOutput('output', result);
}

getData(key)

Get data from node's internal state.

function myNodeFunction(context) {
  const config = context.getData('config');
  // Use config...
}

setData(key, value)

Set data in node's internal state.

function myNodeFunction(context) {
  context.setData('lastResult', result);
}

Data Binding

Form controls with data-key attributes are automatically bound:

<input type="number" data-key="value:number" value="0">
<select data-key="mode:selection">
  <option value="add">Add</option>
  <option value="multiply">Multiply</option>
</select>

Access bound data: 

function myNodeFunction(context) {
  const number = context.getData('value');
  const mode = context.getData('mode');
}

Async Execution

Node functions can be async:

async function fetchData(context) {
  const url = context.getInput('url');
  const response = await fetch(url);
  const data = await response.json();
  context.setOutput('data', data);
}