disallow empty block statements (no-empty)

禁止空块语句 (no-empty)

The "extends": "eslint:recommended" property in a configuration file enables this rule.

配置文件中的 "extends": "eslint:recommended" 属性启用了此规则。

Empty block statements, while not technically errors, usually occur due to refactoring that wasn’t completed. They can cause confusion when reading code.

空语句块，如果不是技术上的错误，通常是由于不完整的重构造成的。这会造成代码阅读上的困惑。

Rule Details

This rule disallows empty block statements. This rule ignores block statements which contain a comment (for example, in an empty catch or finally block of a try statement to indicate that execution should continue regardless of errors).

该规则禁止空语句块出现。该规则忽略包含一个注释的语句块（例如，在 try 语句中，一个空的 catch 或 finally 语句块意味着程序应该继续执行，无论是否出现错误）。

Examples of incorrect code for this rule:

错误代码示例：

/*eslint no-empty: "error"*/

if (foo) {
}

while (foo) {
}

switch(foo) {
}

try {
    doSomething();
} catch(ex) {

} finally {

}

Examples of correct code for this rule:

正确代码示例：

/*eslint no-empty: "error"*/

if (foo) {
    // empty
}

while (foo) {
    /* empty */
}

try {
    doSomething();
} catch (ex) {
    // continue regardless of error
}

try {
    doSomething();
} finally {
    /* continue regardless of error */
}

Options

This rule has an object option for exceptions:

该规则有例外情况，是个对象：

"allowEmptyCatch": true allows empty catch clauses (that is, which do not contain a comment)
"allowEmptyCatch": true 允许出现空的 catch 子句 (也就是说，不包含注释)

allowEmptyCatch

Examples of additional correct code for this rule with the { "allowEmptyCatch": true } option:

选项 { "allowEmptyCatch": true } 的正确代码示例：

/* eslint no-empty: ["error", { "allowEmptyCatch": true }] */
try {
    doSomething();
} catch (ex) {}

try {
    doSomething();
}
catch (ex) {}
finally {
    /* continue regardless of error */
}

When Not To Use It

If you intentionally use empty block statements then you can disable this rule.

如果你打算使用空语句块，那么你可以禁用此规则。

no-empty-function

Version

This rule was introduced in ESLint 0.0.2.

该规则在 ESLint 0.0.2 中被引入。