Rule: "eval" and "arguments" must not be bound or assigned

References: Mozilla documentation, http://es5.github.com/#C

title

"eval" and "arguments" must not be bound or assigned

description

In JavaScript, <code>eval</code> is used to add or remove bindings and to change binding values. <code>arguments</code> is used to access function arguments through indexed properties. As a consequence, those 2 names <code>eval</code> and <code>arguments</code> should not be bound or assigned as it would overwrite the original definition of those 2 elements.

What's more, using those 2 names to assign or bind will generate an error in JavaScript strict mode code.

The following code snippet illustrates cases that will generate violations (changing the names turns the different non-compliant cases into compliant cases):

eval = 17; // non-compliant
arguments++; // non-compliant
++eval; // non-compliant
var obj = { set p(arguments) { } }; // non-compliant
var eval; // non-compliant
try { } catch (arguments) { } // non-compliant
function x(eval) { } // non-compliant
function arguments() { } // non-compliant
var y = function eval() { }; // non-compliant
var f = new Function("arguments", "return 17;"); // non-compliant

message

In case of an new binding: Do not use '

'.

severity

Critical

in Sonar way?

Yes