By inserting malicious code through user input, attackers can exploit your code in one of the most frequent ways. Always validate and sanitise user input before utilising it in your code to avoid this. This can involve sanitising HTML input using tools like DOMPurify as well as checking for expected data types and lengths.
Between the user’s browser and the server, HTTPS encrypts data, preventing hackers from intercepting important information. When sending sensitive data, such as passwords or payment information, HTTPS should always be used.
Avoid using eval():
Eval() poses a possible security risk because it enables the execution of arbitrary code. Consider safer substitutes like JSON.parse() or Function as an alternative.().
Keep your dependencies up to date:
Use strict mode:
Use Content Security Policy (CSP):
Limit user privileges:
To prevent users from accessing sensitive information or carrying out actions that could jeopardise your application, you should always set user permission limits when developing applications that demand user authentication.