no-caller

Disallow the use of arguments.caller or arguments.callee

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;
}
1
2
3

Rule Details

This rule is aimed at discouraging the use of deprecated and sub-optimal code by 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;
});
1
2
3
4
5
6
7
8
9
10
11
12
13

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;
});
1
2
3
4
5
6
7
8
9
10
11
12
13

Version

This rule was introduced in ESLint v0.0.6.

Resources

• Rule source
• Tests source