What are some common mistakes and pitfalls to avoid when working with JavaScript?
Not declaring variables with the "var", "let", or "const" keywords.
Not using semicolons at the end of statements.
Not properly handling asynchronous operations like fetching data from an API.
Mutating objects or arrays directly instead of using methods like push(), pop(), or splice().
To avoid common mistakes and pitfalls in JavaScript, it is crucial to always declare variables using the appropriate keywords and include semicolons at the end of statements for proper syntax. Additionally, handling asynchronous operations correctly by using promises or async/await is necessary to prevent issues with data fetching and manipulation. Finally, it is recommended to use array and object methods instead of mutating them directly to maintain data integrity and prevent unintended bugs.