Difference between functionName = function() {} and function functionName() {}
We have:
const one = function () {
console.log('function one')
}
function two() {
console.log('function two')
}The difference is that one is a function expression and so only defined when that line is reached, whereas two is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).
// TypeError: one is not a function
one();
const one = function() {
console.log("function one");
};// Outputs: "function two"
two();
function two() {
console.log("function two");
}Another difference is that the function name is assign automatically.
function abc(){};
console.log(abc.name); // prints "abc"const abc = function(){};
console.log(abc.name); // prints ""