JSFiddle - React, Tailwind, and code Playground

by Lardpower

JavaScript

const labels = [{
    label: 'a'
  },
  {
    label: 'b',
    buttons: {
      'delete': {
        'eventName': 'delete',
      }
    }
  }
];

let eventNames = [];

labels.forEach((label) => {
	if (label.buttons){
  	Object.values(label.buttons).forEach((btn) => {
    	if (btn.eventName){
      	eventNames.push(btn.eventName);
      }
    })
  }
})

console.log(eventNames);