window.onload = () => {
let arr = [];
for(var i=0; i<10; i++)
{
arr.push(() => {
console.log('var:'+i);
});
}
arr[3]();
let arr2 = [];
for(let x=0; x<10; x++)
{
arr2.push(() => {
console.log('let:'+x);
})
}
arr2[3]();
let arr3 = [];
for(var y=0; y<10; y++)
{
window.onload = function(n){
return arr3.push(() => {
console.log('es5:'+n);
})
}(y)
}
arr3[3]();
}