Are Comments Used To Hide JavaScript From Old Browsers?

Text inside the

comments is ignored by browsers

and thus is not displayed on the webpage. … To end a comment, we use –>. Thus any JavaScript code (line 3 above) placed inside the HTML document is ignored.

How do you hide JavaScript code from old browsers that don’t run it?

Users of old browsers cannot run your JavaScript programs, and this should be

punishment enough–

they should not also have to look at your code! In order to prevent this, you enclose the body of your scripts within an HTML comment, using the format shown in Example 18.1.

How do I hide JavaScript in my browser?

As other have said, there

is no way

to protect javascript intended to run in a browser from a determined viewer. If the browser can run it, then any determined person can view/run it also.

Which of the following comment tag can be used to hide scripts?

How do I hide JavaScript in chrome?

Open Chrome DevTools. Press Control+Shift+P or Command+Shift+P (Mac) to open the Command Menu. Start typing javascript ,

select Disable JavaScript

, and then press Enter to run the command. JavaScript is now disabled.

Why JavaScript is enclosed in HTML comments?

So when javascript was first released,

a technique was needed to hide the code from older browsers

so they wouldn’t show it as text in the page. The ‘hack’ was to use HTML comments within the script block to hide the code.

How do you comment out a block of code in JavaScript?

JavaScript multiline comment has the same purpose as a single-line comment. JavaScript comment block starts with two symbols:

/*

. To end the comment, use these symbols */ again. Everything between these symbols will be treated as a comment in JavaScript.

Can JavaScript code be hidden?

You can’t

. The browser needs the JS code in order to be executed on the page. I tried to think about good cases when you would actually need to hide the code from the user but it doesn’t seem to make a lot of sense since JS is a part of the webpage.

How do I hide responses in my browser?

1. No. You can’t hide it. …
2. You can’t hide the requests, but you can encrypt the data if you really wanted to. …
3. Don’t send the client data that you don’t want the client to have full and unrestricted access to.

How do you comment out a line in JavaScript?

To create a single line comment in JavaScript, you

place two slashes “//” in front of the code or text you wish to have

the JavaScript interpreter ignore.

What is the comment tag?

The HTML comment tag is

used to add text to an HTML document without including that text in the Web page

. This comment will, however, be passed in the HTML file sent to the browser, and can be seen by viewing the page source (View Source). …

What is the correct way to comment out in HTML?

1. The <! — –> is an HTML comment tag.
2. To comment out in HTML, insert information between <! — and –> tags (browsers won’t show these notes).
3. Commenting in HTML allows developers to leave notes about their code, its functionality or to indicate necessary changes for the future.

Is JavaScript supported by all browsers?

All the modern browsers come with built-in support for JavaScript

. Frequently, you may need to enable or disable this support manually. This chapter explains the procedure of enabling and disabling JavaScript support in your browsers: Internet Explorer, Firefox, chrome, and Opera.

Should I disable JavaScript?

You Probably

Don’t Need

to Disable JavaScript

It’s a widely used language that makes the web what it is today, allowing for websites to be more responsive, dynamic, and interactive. Disabling JavaScript takes websites back to a time when they were simple documents without any other features.

What’s JavaScript used for?

JavaScript is a text-based programming language used both on the client-side and server-side that

allows you to make web pages interactive

. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.

Does Google Chrome have JavaScript?

ChromeTM Browser – AndroidTM – Turn JavaScript On / Off

If you can’t view websites or pages won’t load/render on your device, checking your JavaScript settings often helps.

What are comments in JavaScript?

JavaScript comments are

used to write notes in your code or to disable sections of code without deleting them

. Comments are made in JavaScript by adding // before a single line, or /* before and */ after multiple lines. Commenting on code is a core feature of a number of programming languages.

How do you indicate a comment of this is a comment in a JavaScript?

Comments in JavaScript

enable the developer to add notes about the script or comment out sections of script that should not be executed by the interpreter

. Comments can be single line comments (using the // marker) or multi-line (beginning with /* and ending with */).

How do I block comments in HTML?

To write HTML comments

put <! — and —>

at either end of the comment. HTML comments are notes to keep HTML code organized and are ignored by the browser.

Is JavaScript the same as Java?

The JavaScript programming language, developed by Netscape, Inc.,

is not part of the Java platform

. … Java is an OOP programming language while Java Script is an OOP scripting language. Java creates applications that run in a virtual machine or browser while JavaScript code is run on a browser only.

Is JavaScript case sensitive?

JavaScript is Case Sensitive

All JavaScript identifiers are case sensitive.

What is the difference between single line comment and multi line comment?

Single-line comments end at the first end-of-line following the // comment marker. … On the other hand, multi-line comments

can span many lines

or be placed within a code statement and only the content between the comment delimiters will be treated as the comment and ignored during compilation.

How do I hide source code from public view?

“

JavaScript Encryption

“

This is by far the most popular way to try to hide one’s source code. It involves taking your code, using a custom made function to “encrypt” it somehow, and then putting it in an HTML file along with a function that will decrypt it for the browser.

How do I hide my code?

Type

“<” followed by

“! —” (no quotes and no spaces) before the first character of the text you want to hide. This open comment tag tells Internet browsers to begin hiding everything from this point forward.

How do I hide a script in inspect element?

There is no way to hide

the JS code. JS-Scripts are running inside your Browser. So the Browser must know the JS-Scripts. And if the Browser know it, the user can have a look at them.

How do I hide payload in browser?

1 Answer.

You can’t really hide HTTP request showing up

on browsers. What you can do is control who gets hold of that access token, its expiry time and what permissions and claims he has. You can’t hide the browser’s activities from a user running that browser.

How are comments written in Java?

Single-line comments

start with two forward slashes ( // )

. Any text between // and the end of the line is ignored by Java (will not be executed).

How do I know if JavaScript is enabled in my browser?

1. go to Tools.
2. then Internet Options…
3. select the Security tab.
4. press the Custom Level button.
5. scroll down to Scripting.
6. enable Active Scripting.

Which of the following is not supported by JavaScript?

Which of the following is not JavaScript Data Types? Explanation: These are the JavaScript Data types:

Number, String, Boolean, Object, Undefined

.

What are the two forms of JavaScript comments?

• Single-line Comment.
• Multi-line Comment.

What does isNaN function do in JavaScript?

JavaScript isNaN() Function. The isNaN() function is

used to check whether a given value is an illegal number or not

. It returns true if value is a NaN else returns false.

Does Internet Explorer support JavaScript?

Internet Explorer doesn’t actually support JavaScript or ECMAScript

; it supports a language variety called JScript. In recent years, JScript has fully supported the ECMAScript 3 standard and has some ECMAScript 5 support.

Should you comment in HTML?

Avoid Commenting Absolutely

Everything

If you considered semantics when naming your classes, your code may already be easy to understand. This may also be where the concept of “good code does not need comments” came from. Comments should not be completely avoided, but only used where necessary.

What are two types of comment tags?

Single-line comment

.

Multi-lines comment

.

Using

<comment> tag.

What is comments in HTML?

Comments are

some text or code written in your code to give an explanation about the code, and not visible to the user

. Comments which are used for HTML file are known as HTML comments. Anything written between these tags will be ignored by the browser, so comments will not be visible on the webpage.

How do you comment in HTML and CSS?

How to Comment in CSS. To comment in CSS, simply

place your plain text inside /* */ marks

. This tells the browser that they are notes and should not be rendered on the front end.

How do you make a comment in CSS?

The /* */ comment syntax is used for both single and multiline comments. There is no other way to specify comments in external style sheets. However, when using the

<style> element

, you may use <!

Why is JavaScript bad for privacy?

According to W3Techs, approximately 88.1% of all websites use JavaScript in one way or another. … But as we’ll soon see, JavaScript is not perfect.

It can be abused

, and that abuse leads to scenarios that make it possible to snoop on your Internet activity and violate your privacy.

What happens if you turn JavaScript off?

Still, turning off JavaScript

limits your exposure to exploits

, and reduces the number of ways that third parties can vacuum up your data.

Is JavaScript harmful?

JavaScript is 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.