Issues (4542)

js/sidebar/modernizr.custom.js (19 issues)

1
/* Modernizr 2.6.2 (Custom Build) | MIT & BSD
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 * Build: http://modernizr.com/download/#-csstransforms3d-shiv-cssclasses-teststyles-testprop-testallprops-prefixes-domprefixes-load
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 */
4
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0 ignored issues
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The assignment to variable i seems to be never used. Consider removing it.
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The variable k seems to not be initialized for all possible execution paths.
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The variable m is changed by the for-each loop on line 4. Only the value of the last iteration will be visible in this function if it is called outside of the loop.
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Compatibility Best Practice introduced by
You are extending the built-in type Function. This may have unintended consequences on other objects using this built-in type. Consider subclassing instead.
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The variable s seems to be never used. Consider removing it.
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The variable n is changed by the for-each loop on line 4. Only the value of the last iteration will be visible in this function if it is called outside of the loop.
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Comprehensibility introduced by
Usage of the sequence operator is discouraged, since it may lead to obfuscated code.

The sequence or comma operator allows the inclusion of multiple expressions where only is permitted. The result of the sequence is the value of the last expression.

This operator is most often used in for statements.

Used in another places it can make code hard to read, especially when people do not realize it even exists as a seperate operator.

This check looks for usage of the sequence operator in locations where it is not necessary and could be replaced by a series of expressions or statements.

var a,b,c;

a = 1, b = 1,  c= 3;

could just as well be written as:

var a,b,c;

a = 1;
b = 1;
c = 3;

To learn more about the sequence operator, please refer to the MDN.

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Comprehensibility Naming Best Practice introduced by
The variable c already seems to be declared on line 4. Consider using another variable name or omitting the var keyword.

This check looks for variables that are declared in multiple lines. There may be several reasons for this.

In the simplest case the variable name was reused by mistake. This may lead to very hard to locate bugs.

If you want to reuse a variable for another purpose, consider declaring it at or near the top of your function and just assigning to it subsequently so it is always declared.

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Comprehensibility Naming Best Practice introduced by
The variable l already seems to be declared on line 4. Consider using another variable name or omitting the var keyword.

This check looks for variables that are declared in multiple lines. There may be several reasons for this.

In the simplest case the variable name was reused by mistake. This may lead to very hard to locate bugs.

If you want to reuse a variable for another purpose, consider declaring it at or near the top of your function and just assigning to it subsequently so it is always declared.

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The function A does not seem to be used and can be removed.
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The parameter c is not used and could be removed.

This check looks for parameters in functions that are not used in the function body and are not followed by other parameters which are used inside the function.

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The variable j is changed as part of the for-each loop for example by function() { var a = [].....apply(this, a), l(); } on line 4. Only the value of the last iteration will be visible in this function if it is called after the loop.
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Performance Best Practice introduced by
Using new Function() to create a function is slow and difficult to debug. Such functions do not create a closure. Consider using another way to define your function.
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The variable r seems to be never used. Consider removing it.
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The variable l seems to be never used. Consider removing it.
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A for in loop automatically includes the property of any prototype object, consider checking the key using hasOwnProperty.

When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically:

var someObject;
for (var key in someObject) {
    if ( ! someObject.hasOwnProperty(key)) {
        continue; // Skip keys from the prototype.
    }

    doSomethingWith(key);
}
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The variable k seems to be never used. Consider removing it.
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Coding Style Best Practice introduced by
Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

Consider adding curly braces around all statements when they are executed conditionally. This is optional if there is only one statement, but leaving them out can lead to unexpected behaviour if another statement is added later.

Consider:

if (a > 0)
    b = 42;

If you or someone else later decides to put another statement in, only the first statement will be executed.

if (a > 0)
    console.log("a > 0");
    b = 42;

In this case the statement b = 42 will always be executed, while the logging statement will be executed conditionally.

if (a > 0) {
    console.log("a > 0");
    b = 42;
}

ensures that the proper code will be executed conditionally no matter how many statements are added or removed.

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Coding Style Best Practice introduced by
By convention, constructors like a should be capitalized.
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