Check out the following code:
var numberArray = [0, 1]
(function() {
numberArray.push(2)
function nestedFunction() {
numberArray.push(3)
function anotherNestedFunction() {
numberArray.push(4)
}
console.log(numberArray)
}
})()I anticipate numberArray to have the values [0, 1, 2, 3, 4], however, an error is being thrown:
TypeError:[0, 1]is not a function
let numArray = [2, 3]
(function() {
This code snippet is similar to
const numArray = [2, 3] (function() {
Here is where the mistake occurs.
To fix the problem, add a ; after the array declaration to ensure the JavaScript engine interprets both lines as separate statements:
let numArray = [2, 3];
(function() {
numArray.push(4);
function innerFunction() {
numArray.push(5);
function anotherInnerFunction() {
numArray.push(6);
}
anotherInnerFunction();
console.log(numArray);
}
innerFunction();
})();To avoid these unexpected issues, it is recommended to always use semicolons (;) after each statement in JavaScript.
Check out this functional code snippet.
const numberArray = [0, 1];
(function() {
numberArray.push(2);
(function nestedFunction() {
numberArray.push(3);
(function anotherNestedFunction() {
numberArray.push(4);
})();
console.log(numberArray);
})();
})();Be cautious when editing the code by removing the ; after numberArray. It's also important to incorporate IIFE with your internally defined functions.
const numberArray = [0, 1]
(function() {
numberArray.push(2);
(function nestedFunction() {
numberArray.push(3);
(function anotherNestedFunction() {
numberArray.push(4);
})();
console.log(numberArray);
})();
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