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Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div id="rete" class="node-editor"></div>

<a target="_blank" href="https://github.com/retejs/rete"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/652c5b9acfaddf3a9c326fa6bde407b87f7be0f4/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f6f72616e67655f6666373630302e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_ff7600.png"></a>
   
            
          
!

CSS

            
              html,body{
  height: 100%;
  margin: 0;
}
#d3ne {
    height: 100%;
   position: relative;
}

.socket.data {
    background: rgb(143, 125, 224)
}

.socket.act {
    background: rgb(16, 202, 16);
    border-radius: 0 !important;
    width: 16px !important;
}

id {
    position: absolute;
    left: -6px;
    top: -6px;
    background: white;
}

button.compile {
        z-index: 5;
    position: absolute;
    top: 10px;
    left: 10px;
}
            
          
!

JS

            
              var actionSocket = new Rete.Socket('Action');
var dataSocket = new Rete.Socket('Data');

var eventHandlers = {
    list: [],
    remove() {
        this
            .list
            .forEach(h => {
                document.removeEventListener('keydown', h);
            });
        this.list = [];
    },
    add(name, h) {
        document.addEventListener(name, h, false);
        this
            .list
            .push(h);
    }
};



class MessageControl extends Rete.Control {

    constructor(emitter, msg) {
        super();
        this.emitter = emitter;
        this.template = '<input :value="msg" @input="change($event)"/>';

        this.scope = {
            msg,
            change: this.change.bind(this)
        };
    }

    change(e) {
        this.scope.value = +e.target.value;
        this.update();
    }

    update() {
        this.putData('msg', this.scope.value)
        this.emitter.trigger('process');
        this._alight.scan();
    }

    mounted() {
        this.scope.value = this.getData('msg') || 0;
        this.update();
    }

    setValue(val) {
        this.scope.value = val;
        this._alight.scan()
    }
}

class KeydownComponent extends Rete.Component {
  
  constructor(){
    super('Keydown event');
    this.task = {
      outputs: {act: 'option', key: 'output'},
      init(task){
        eventHandlers.remove();
        eventHandlers.add('keydown', function (e) {
          task.run(e.keyCode);
          task.reset();
        });
      }
    }
  }
  
  builder(node) {
    node.addOutput(new Rete.Output('act', '', actionSocket))
    node.addOutput(new Rete.Output('key', 'Key code', dataSocket));
  }
  
  worker(node, inputs, data) {
    console.log('Keydown event', node.id, data);
    return {key: data}
  }
}

class EnterPressComponent extends Rete.Component {
  
  constructor(){
    super('Enter pressed');
    this.task = {
      outputs: {then:'option', else:'option'}
    }
  }
  
  builder(node) {

    node
      .addInput(new Rete.Input('act','', actionSocket))
      .addInput(new Rete.Input('key', 'Key code', dataSocket))
      .addOutput(new Rete.Output('then', 'Then', actionSocket))
      .addOutput(new Rete.Output('else', 'Else', actionSocket));
  }

  worker(node, inputs, outputs) {
    if (inputs['key'][0] == 13) 
      this.closed = ['else'];
    else 
      this.closed = ['then'];

    console.log('Print', node.id, inputs);
  }
}

class AlertComponent extends Rete.Component {
  
  constructor() {
    super('Alert');
    this.task = {
      outputs: {}
    }
  }

  builder(node) {
    var ctrl = new MessageControl(this.editor, node.data.msg);
    
    node
      .addControl(ctrl)
      .addInput(new Rete.Input('act', '', actionSocket));
  }

  worker(node, inputs) {
    console.log('Alert', node.id, node.data);
    alert(node.data.msg);
 }
}

var components = [new KeydownComponent, new EnterPressComponent, new AlertComponent];
var container = document.querySelector('#rete')


var editor = new Rete.NodeEditor('tasksample@0.1.0', container,);
editor.use(AlightRenderPlugin);
editor.use(ConnectionPlugin);
editor.use(ContextMenuPlugin);
editor.use(TaskPlugin);

var engine = new Rete.Engine('tasksample@0.1.0');

components.map(c => {
  editor.register(c);
  engine.register(c);
});

editor.on('connectioncreate connectionremove nodecreate noderemove', ()=>{
  if(editor.silent) return;
     
  compile();
});




async function compile() {
    await engine.abort();
    await engine.process(editor.toJSON());
}



var data = {
    'id': 'tasksample@0.1.0',
    'nodes': {
        '2': {
            'id': 2,
            'data': {},
            'group': null,
            'inputs': {},
            'outputs': {
                'act': {
                    'connections': [
                        {
                            'node': 3,
                            'input': 'act'
                        }
                    ]
                },
                'key': {
                    'connections': [
                        {
                            'node': 3,
                            'input': 'key'
                        }
                    ]
                }
            },
            'position': [
                114, 133
            ],
            'name': 'Keydown event'
        },
        '3': {
            'id': 3,
            'data': {},
            'group': null,
            'inputs': {
                'act':{
                    'connections': [
                        {
                            'node': 2,
                            'output': 'act'
                        }
                    ]
                }, 
                'key': {
                    'connections': [
                        {
                            'node': 2,
                            'output': 'key'
                        }
                    ]
                }
            },
            'outputs': {
                'then':{
                    'connections': [
                        {
                            'node': 10,
                            'input': 'act'
                        }
                    ]
                }, 
                'else': {
                    'connections': [
                        {
                            'node': 11,
                            'input': 'act'
                        }
                    ]
                }
            },
            'position': [
                443, 112
            ],
            'name': 'Enter pressed'
        },
        '10': {
            'id': 10,
            'data': {
                'msg': 'Enter!'
            },
            'group': null,
            'inputs': {
                'act': {
                    'connections': [
                        {
                            'node': 3,
                            'output': 'then'
                        }
                    ]
                }
            },
            'outputs': [],
            'position': [
                773, 106
            ],
            'name': 'Alert'
        },
        '11': {
            'id': 11,
            'data': {
                'msg': 'Another key pressed'
            },
            'group': null,
            'inputs': {
                'act': {
                    'connections': [
                        {
                            'node': 3,
                            'output': 'else'
                        }
                    ]
                }
            },
            'outputs': [],
            'position': [
                766, 292
            ],
            'name': 'Alert'
        }
    },
    'groups': {}
}

editor.fromJSON(data).then(() => {
    editor.view.resize();
    compile();
});

            
          
!
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