Disallow Use of caller/callee (no-caller)
The use of arguments.caller
and arguments.callee
make several code optimizations impossible. They have been deprecated in future versions of JavaScript and their use is forbidden in ECMAScript 5 while in strict mode.
function foo() {
var callee = arguments.callee;
}
Rule Details
This rule is aimed at discouraging the use of deprecated and sub-optimal code, but disallowing the use of arguments.caller
and arguments.callee
. As such, it will warn when arguments.caller
and arguments.callee
are used.
Examples of incorrect code for this rule:
/*eslint no-caller: "error"*/
function foo(n) {
if (n <= 0) {
return;
}
arguments.callee(n - 1);
}
[1,2,3,4,5].map(function(n) {
return !(n > 1) ? 1 : arguments.callee(n - 1) * n;
});
Examples of correct code for this rule:
/*eslint no-caller: "error"*/
function foo(n) {
if (n <= 0) {
return;
}
foo(n - 1);
}
[1,2,3,4,5].map(function factorial(n) {
return !(n > 1) ? 1 : factorial(n - 1) * n;
});
Version
This rule was introduced in ESLint 0.0.6.