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5 JavaScript tools for Optimizing SEO performance
Libraries can enhance your website's SEO friendliness but content quality and user experience are still crucial for ranking high in search results.
Find the error in the code.
Difficulty: Easyπ
function add(a, b) {
return a + b;
}
const result = add(5);
console.log(result);Which HTML5 element represents a self-contained piece of content that could be distributed independently?
Which JavaScript method is used to remove the last element from an array?
What will this code output? Spot the bug.
Difficulty: Hardπ€
for (var i = 0; i < 5; i++) {
setTimeout(function() {
console.log(i);
}, 1000);
}
+5
Spread Operator in Depth
Ecmascript 2015 or ES6 is the sixth major edition of Ecmascript language specification standard. It bought significant changes to Javascript language.
Which of the following creates a true copy of the object obj in JavaScript?
What will this code output? Spot the bug.
Difficulty: Hardπ€
for (var i = 0; i < 5; i++) {
setTimeout(function() {
console.log(i);
}, 1000);
}for (var i = 0; i < 5; i++) {
setTimeout(function() {
console.log(i);
}, 1000);
}
Which property is used to create space inside an element between its content and its border?
Find the error in the code.
Difficulty: Easyπ
function add(a, b) {
return a + b;
}
const result = add(5);
console.log(result);