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[amhatest01]

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[codacy-development]

⚠️ Codacy found a medium Code Style issue: Unexpected var, use let or const instead.

The issue identified by the ESLint linter is that the var keyword is considered outdated and has been largely replaced by let and const in modern JavaScript. The var keyword has function scope and can lead to unexpected behavior due to hoisting, whereas let and const have block scope and are more predictable.

To fix the issue, you should replace var with either let or const. Since message is not reassigned after its initial declaration, const is the appropriate choice here.

Here is the single line change to fix the issue:

Suggested change

	var message = "Welcome, " + userInput;
	const message = "Welcome, " + userInput;

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This comment was generated by an experimental AI tool.

[codacy-development]

⚠️ Codacy found a medium Security issue: Unencoded input 'message' used in HTML context

The issue identified by ESLint is a Cross-Site Scripting (XSS) vulnerability. XSS attacks occur when an attacker is able to inject malicious scripts into web pages viewed by other users. In this case, the userInput contains a script tag that will be executed when assigned to the innerHTML property of an element, thus leading to an XSS attack.

To fix this issue, you should ensure that any user input is properly sanitized or encoded before being inserted into the DOM. One way to mitigate this is to use textContent instead of innerHTML, which will treat the content as plain text and not HTML.

Suggested change

	document.getElementById("output").innerHTML = message;
	document.getElementById("output").textContent = message;

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This comment was generated by an experimental AI tool.

[codacy-development]

⚠️ Codacy found a medium Security issue: Non-HTML variable 'userInput' is used to store raw HTML

The issue here is that the userInput variable contains raw HTML, which is then directly inserted into the DOM using innerHTML. This makes the code vulnerable to Cross-Site Scripting (XSS) attacks, as any malicious script included in userInput will be executed by the browser.

To fix this issue, you should sanitize the userInput to ensure that any HTML tags are escaped before inserting it into the DOM. This can be done by creating a text node and setting its textContent property, which automatically escapes any HTML.

Here is the single line change to fix the issue:

Suggested change

	var userInput = "<script>alert('XSS Attack!');</script>";
	var message = "Welcome, " + document.createTextNode(userInput).textContent;

This change ensures that any HTML in userInput is treated as text and not as executable code, thereby mitigating the XSS vulnerability.

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This comment was generated by an experimental AI tool.

[codacy-development]

⚠️ Codacy found a medium Code Style issue: Unexpected var, use let or const instead.

The issue identified by the ESLint linter is related to the use of the var keyword, which is considered outdated and has been largely replaced by let and const in modern JavaScript. The var keyword has function scope, which can lead to unexpected behavior due to hoisting and scope leakage. In contrast, let and const have block scope, providing more predictable and safer variable declarations.

To fix this issue, we can replace var with const since userInput is not being reassigned after its initial declaration.

Suggested change

	var userInput = "<script>alert('XSS Attack!');</script>";
	const userInput = "<script>alert('XSS Attack!');</script>";

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This comment was generated by an experimental AI tool.

[codacy-development]

⚠️ Codacy found a medium Security issue: Unsafe assignment to innerHTML

The issue here is that assigning userInput directly to innerHTML can lead to a Cross-Site Scripting (XSS) attack. This happens because the userInput can contain malicious scripts that will be executed when the browser renders the HTML.

To fix this issue, you should avoid using innerHTML for user-generated content and instead use textContent, which will safely set the text content of the element without interpreting it as HTML.

Here's the code suggestion to fix the issue:

Suggested change

	document.getElementById("output").innerHTML = message;
	document.getElementById("output").textContent = message;

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This comment was generated by an experimental AI tool.