What Are The Limitations Of JavaScript?

What can PHP do that JavaScript Cannot?

PHP is a server-side scripting language.

JavaScript is run client-side.

You can for example not do anything database related in JavaScript.

Even if there where database libraries written for JavaScript they would be of no use because your server cannot trust database queries done by the client..

Is JavaScript a virus?

The threat a virus impose in your system is, ideally, independent of its programming language because viruses exploit vulnerabilities in operating systems, applications, APIs etc. In this sense, a Javascript virus is as dangerous as any other virus. … tl;dr: JavaScript is as dangerous as any other programming language.

Why do I need JavaScript?

JavaScript is a programming language used primarily by Web browsers to create a dynamic and interactive experience for the user. Most of the functions and applications that make the Internet indispensable to modern life are coded in some form of JavaScript.

What is JavaScript and its advantages and disadvantages?

Advantages of JavaScript Client-side JavaScript is very fast because it can be run immediately within the client-side browser. Unless outside resources are required, JavaScript is unhindered by network calls to a backend server. Simplicity. JavaScript is relatively simple to learn and implement.

What are .JS files?

What is a JS file? Files containing the . js extension are most commonly associated with JavaScript files. These JS files contain JavaScript code that is used to execute instructions in a Web page that uses client-side scripting.

Can JavaScript track you?

A simple chunk of embedded JavaScript is all that’s needed to record any kind of activity on a webpage — even if you don’t actually submit anything! Web scrolling, mouse movements, keystrokes: all of it can be tracked and recorded against your will or knowledge.

Is PHP secure?

“PHP is as secure as any other major language” PHP is as secure as any other major language. The problem with PHP is also the problem with every single other language: you can write insecure code in it,” he underscores his point, “but that’s a fundamental problem in every single programming language.

Is PHP going to die?

According to W3Techs’ data, PHP is used by 78.9% of all websites with a known server-side programming language. So almost 8 out of every 10 websites that you visit on the Internet are using PHP in some way. … But when the number is still over 75%, it’s tough to use that decline to pronounce PHP as dead.

Is JavaScript harder than PHP?

But it is more difficult than PHP. A beginning JS developer needs to have more knowledge than a beginning PHP developer. However, the effort you put into learning JavaScript totally pays off. Since JavaScript is more universal than PHP, the learning effort brings much more value.

Can JavaScript replace PHP?

js is not ideally for any web application. So it will not overtake PHP. But it is very efficient in handling large number of requests, I/O connections, works great with web-sockets, and comet pulling. It is an single threaded, event driven, non-blocking language.

What are the disadvantages of JavaScript?

Disadvantages of JavaScriptClient-side Security. Since the JavaScript code is viewable to the user, others may use it for malicious purposes. … Browser Support. The browser interprets JavaScript differently in different browsers. … Lack of Debugging Facility. … Single Inheritance. … Sluggish Bitwise Function. … Rendering Stopped.

Is JavaScript safe?

Modern JavaScript is a “safe” programming language. It does not provide low-level access to memory or CPU, because it was initially created for browsers which do not require it. JavaScript’s capabilities greatly depend on the environment it’s running in. For instance, Node.

Why is Java better than PHP?

1. PHP VS Java: Performance & Speed. In a nutshell: While comparing the Java vs PHP performance, Java is clearly a winner as it is faster and efficient than PHP to write enterprise applications. Like developers have to build mobile enterprise applications to streamline complex business processes and operations.

Do I need JavaScript enabled?

JavaScript is enabled in your web browser. … A lot of websites use Javascript as a part of their core functionality, and if you browse the internet without JavaScript enabled then you probably won’t have the full experience that you normally would. Some websites may not work properly, others may not work at all.

How do I know if JavaScript is working?

If you click the “Test JavaScript” button, then the text box below it should show ‘Yes, JavaScript is enabled. ‘ After you click it, if the text is showing “enabled”, then assume JavaScript is running.

What are the limitations of PHP?

DisadvantagesSecurity: Since it is open sourced, all people can see the source code. … Not suitable of large applications: It will be difficult to use it for programming huge applications. … Weak type: Implicit conversion may surprise unwary programmers and lead to unexpected bugs.More items…

What are the advantages disadvantages of MySQL and PHP?

What are advantages and disadvantages of PHP & MySQL?However, the PHP framework Training has both advantages and disadvantages: Advantages: … The database is an essential point:Make use of the wire-frame prior to coding:Disadvantages:MySQL – Advantages and Disadvantages. … Advantages:It’s Simple To Use. … Quick Support Is Always Available whenever required.More items…

Why is JavaScript dangerous?

JavaScript can be dangerous if the proper precautions aren’t taken. It can be used to view or steal personal data even you don’t realize what’s going on. And since JavaScript is so ubiquitous across the web, we’re all vulnerable. … Javascript is called the language of the Web.