default value set in function code example

Example 1: javascript default parameters

function multiply(a, b = 1) {
  return a * b;
}

Example 2: ES6: Set Default Parameters for Your Functions

const resultDisplayArray = []; 
for(let i = 0; i < result.failure.length; i++) {
resultDisplayArray.push(`<li class="text-warning">${result.failure[i]}</li>`); 
}