disallow reassigning function declarations (no-func-assign)

禁止对 function 声明重新赋值 (no-func-assign)

JavaScript functions can be written as a FunctionDeclaration function foo() { ... } or as a FunctionExpression var foo = function() { ... };. While a JavaScript interpreter might tolerate it, overwriting/reassigning a function written as a FunctionDeclaration is often indicative of a mistake or issue.

JavaScript 函数有两种形式:函数声明 function foo() { ... } 或者函数表达式 var foo = function() { ... } 。虽然 JavaScript 解释器可以容忍对函数声明进行覆盖或重新赋值,但通常这是个错误或会导致问题出现。

function foo() {}
foo = bar;

Rule Details

This rule disallows reassigning function declarations.

该规则禁止对 function 声明重新赋值。

Examples of incorrect code for this rule:

错误 代码示例:

/*eslint no-func-assign: "error"*/

function foo() {}
foo = bar;

function foo() {
    foo = bar;
}

Examples of incorrect code for this rule, unlike the corresponding rule in JSHint:

与 JSHint 中对应的规则不同,该规则的 错误 代码示例:

/*eslint no-func-assign: "error"*/

foo = bar;
function foo() {}

Examples of correct code for this rule:

正确 代码示例:

/*eslint no-func-assign: "error"*/

var foo = function () {}
foo = bar;

function foo(foo) { // `foo` is shadowed.
    foo = bar;
}

function foo() {
    var foo = bar;  // `foo` is shadowed.
}

Version

This rule was introduced in ESLint 0.0.9.

该规则在 ESLint 0.0.9 中被引入。

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