security in JavaScript programming language - writing secure code

 security in JavaScript programming language - writing secure code.

Writing secure code has become a growing risk to the software development industry, imagine, handling important Data that is valuable to your company and customers, you want to cover secure to the possible rip, with tons of development tools and JavaScript libraries out there that are more than secure.

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It's definitely a saying that, don't store important info on the user device, because anything store on a user device is compromised.

That's fair, you don't know what your users can do on what is on their devices
And you also don't know parties that are havesting such important details from them even without their knowledge.

Store important info on your server :), you can risky cache while offline but always erase after a connection and yep.

Sad and definitely, you also should know better to write secure and hard crack software, but how, well let's go through the basic way of securing your code, at runtime in real time.

 insecure JavaScript practices 

 1. Avoid using the eval() keyword to evaluate script, it's most times, not necessary and using it is a big security hole that people can exploit.
 2. Always purify user inputs using form validation techniques and regular expressions

 aleast, try to require less texted input from users, and 100% purifying such inputs, you can test if they contain script they may be harmful to your infrastructure. 

 3. Avoid using innerHTML, html parser and the likes are dangerous stuff that when exploited can set your software on fire, avoid such keywords in JavaScript, it's hardly still used in real world projects, and that's the value of using a component library like react, Vue, angular and uiedbook and their full state management infrastructure that makes building user interface like casting a spell.

 4. Store important info on your database instead of the user device, what ever is stored on the user device is compromised. Yep and yep.

 5. Use environment tools to secure your API call and all connection to backend containing important creditials, because getting and sending payload from your backend may require parameters which are important creditials that you don't want people to exploit, so you have to hide them.

 6. Use recapchers are other anti-bot techniques, bot are now tools for attacks than when they were conceived and the bot market is growing smarter and uglier in how they affect us, so it's time to give them their limit before they are used to cause irreversible dangers.

 Now is the interesting part. 

What are the tools mostly used for establishing useful and cool software, well we are got some good recommendations, 

Use user interface libraries like React, Angular, Vue, svelte, and uiedbook. Or a backend renderer like Next.js these are very cool library that you won't want to miss, they provide security out of the box and make you write better and cleaner software.

 But that's not all.

It's interesting to confirm that security issues have been a constant treat to every software at there especially those created in JavaScript, it's also hard to find pro software developers who write clean code, but the good part is modern JavaScript features avoid security pit falls as the language is been updated and optimized on a constant basics.

 wrapping up 

Let's take security concerns in our software a bit further, I recommend you start fixing potential pit falls and review your code to last detail of discretion,

 this has been security in JavaScript in 600 lines, it's most honourable if you share, thanks for your time. 


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  1. Great content sir. Never knew of the risk attached to "inner HTML" until I met your post. Great security content. Will love to see more like this.


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