Javascript Programming Tutorials, Guides & Best Practices

• JavaScript was standardized under the name ECMAScript by ECMA International.
• The first edition of ECMAScript (ES1) laid the foundation for modern JavaScript.

• Competing browsers (Netscape, Internet Explorer) implemented JavaScript differently, leading to compatibility issues.
• The advent of libraries like jQuery (2006) helped developers write cross-browser code more easily.

Block Scope Example:

if (true) {
    let x = 10;
    const y = 20;
    console.log(x, y); // Output: 10 20
}
// console.log(x, y); // Error: x and y are not defined