Create a stylesheet document.write function that will never be true

Question

Create a stylesheet document.write function that will never be true

While examining the source code of a webpage, I stumbled upon this intriguing piece of JavaScript right after the standard stylesheet declaration:

<script type="text/javascript">
    if('' != '')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }
</script>

I'm curious - what could be the purpose behind adding such JavaScript to an HTML page? It seems like this snippet may never actually run, leading to the conclusion that the associated stylesheet is not added to the document. Am I missing something obvious here, or was this simply a mistake?

Why include this element in the HTML code at all - for a specific reason, or just an oversight?

javascript html css stylesheet

Answer 1

Answer №1

There is a scenario where this could be justified, even though it may still seem messy - If the server were to output a value in order for the condition to not be met, then the stylesheet would be applied.

For instance, in a PHP script on the server, it could look like this:

echo "if('{$someVar}' != '')"

If $someVar happens to be an empty string, the page source will remain as-is. However, if $someVar is assigned a value like foo, then the output would change to:

if('foo' != '')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }

In such a scenario, it would indeed be more sensible to handle this process on the server side, as pointed out by user: still_learning in the comments below.

if($someVar != '') echo "<link type='text/css' rel='stylesheet' href='style.css' />";

This interpretation suggests that it might have been a simple toggle switch left by developers to easily enable or disable the stylesheet. Removing the ! would reactivate the stylesheet.

Answer 2

There is a scenario where this could be justified, even though it may still seem messy - If the server were to output a value in order for the condition to not be met, then the stylesheet would be applied.

For instance, in a PHP script on the server, it could look like this:

echo "if('{$someVar}' != '')"

If $someVar happens to be an empty string, the page source will remain as-is. However, if $someVar is assigned a value like foo, then the output would change to:

if('foo' != '')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }

In such a scenario, it would indeed be more sensible to handle this process on the server side, as pointed out by user: still_learning in the comments below.

if($someVar != '') echo "<link type='text/css' rel='stylesheet' href='style.css' />";

This interpretation suggests that it might have been a simple toggle switch left by developers to easily enable or disable the stylesheet. Removing the ! would reactivate the stylesheet.

Answer 3

Answer №2

It is possible that the content on this page was created using a JSP or another template engine such as Freemarker, which requires compiling the source code in order to display the final outcome.

Answer 4

It is possible that the content on this page was created using a JSP or another template engine such as Freemarker, which requires compiling the source code in order to display the final outcome.

Answer 5

Answer №3

Given the constant false condition, it appears that this code block will never be executed. However, if there is potential for dynamic changes to the condition, alternative scenarios may need to be considered.

Answer 6

Given the constant false condition, it appears that this code block will never be executed. However, if there is potential for dynamic changes to the condition, alternative scenarios may need to be considered.

Answer 7

Answer №4

While examining the page source, it's advisable to review the code for any potential issues.

if('' != '')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }

If this code is dynamic, it may enhance the css on the page or you could opt to remove it if it's unnecessary.

Answer 8

While examining the page source, it's advisable to review the code for any potential issues.

if('' != '')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }

If this code is dynamic, it may enhance the css on the page or you could opt to remove it if it's unnecessary.

Answer 9

Answer №5

One common mistake is assuming that

'' != ''

will always be false.

It's important to remember that the strings being compared may be generated dynamically on the server side. It's possible that there are scenarios where the strings are actually different, so it's best to investigate further before making any assumptions.

If there is a possibility of the strings being different, it's recommended to perform the comparison on the server side and only display the result when necessary.

Answer 10

One common mistake is assuming that

'' != ''

will always be false.

It's important to remember that the strings being compared may be generated dynamically on the server side. It's possible that there are scenarios where the strings are actually different, so it's best to investigate further before making any assumptions.

If there is a possibility of the strings being different, it's recommended to perform the comparison on the server side and only display the result when necessary.

Answer 11

Answer №6

It seems that the script is not running on your end.

However, there could be server-side variables within the script that might execute in a different scenario.

For instance,

<script type="text/javascript">
    if('<%=device%>' != '<%=mobile%>')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }
</script>

where <%=device%> and <%=mobile%> represent potential server-side variables.

NOTE- I utilized PHP for server-side coding, but it could be any other programming language.

Answer 12

It seems that the script is not running on your end.

However, there could be server-side variables within the script that might execute in a different scenario.

For instance,

<script type="text/javascript">
    if('<%=device%>' != '<%=mobile%>')
    {
        document.write("<link type='text/css' rel='stylesheet' href='style.css' />");
    }
</script>

where <%=device%> and <%=mobile%> represent potential server-side variables.

NOTE- I utilized PHP for server-side coding, but it could be any other programming language.

Create a stylesheet document.write function that will never be true

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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