JSFiddle - React, Tailwind, and code Playground

HTML

<div id='diu'>

</div>

JavaScript

const a = {m: 'beeb'};


const magic = function topLevel () {
   function lowerLevel() {
    if ({m} = a ) { 
      console.log('in lowerLe-func: ', m);
    }
  }
  
  lowerLevel();
}


magic();

console.log('in global', m);
document.getElementById('diu').innerHTML = m;