How to add placeholder for standard rectangle in jointjs

Question

I use library "jointjs" in nodejs. So now I want to add placeholder change for text "hello". Can you help me? Please.

var Rectangle = Element$1.define('standard.Rectangle', {
            attrs: {
                body: {
                    refWidth: '100%',
                    refHeight: '100%',
                    strokeWidth: 2,
                    stroke: '#000000',
                    fill: '#FFFFFF'
                },
                label: {
                    textVerticalAnchor: 'middle',
                    textAnchor: 'middle',
                    refX: '50%',
                    refY: '50%',
                    fontSize: 14,
                    fill: '#333333',
                    text: "hello", //Change to placeholder 
                }
            }
        }, {
            markup: [{
                tagName: 'rect',
                selector: 'body',
            }, {
                tagName: 'text',
                selector: 'label'
            }]
        });

question from:https://stackoverflow.com/questions/65640760/how-to-add-placeholder-for-standard-rectangle-in-jointjs

Answer 1

Waitting for answers