implicit-arrow-linebreak
Enforce the location of arrow function bodies
🔧 Fixable
Some problems reported by this rule are automatically fixable by the --fix
command line option
箭头函数体可以包含作为表达式的隐式返回,而不是块体。这有助于让隐式返回的表达式位于同一位置。
规则细节
这条规则的目的是为确保包含隐性返回的箭头函数有相同的风格。
选项
此规则选项为字符串:
"beside"
(默认值)不允许在箭头函数体前有换行。"below"
要求在箭头函数体前有一个换行。
使用此规则与默认的 "beside"
选项的错误示例:
Open in Playground
/* eslint implicit-arrow-linebreak: ["error", "beside"] */
(foo) =>
bar;
(foo) =>
(bar);
(foo) =>
bar =>
baz;
(foo) =>
(
bar()
);
使用此规则与默认的 "beside"
选项的正确示例:
Open in Playground
/* eslint implicit-arrow-linebreak: ["error", "beside"] */
(foo) => bar;
(foo) => (bar);
(foo) => bar => baz;
(foo) => (
bar()
);
// functions with block bodies allowed with this rule using any style
// to enforce a consistent location for this case, see the rule: `brace-style`
(foo) => {
return bar();
}
(foo) =>
{
return bar();
}
使用此规则与 "below"
选项的错误示例:
Open in Playground
/* eslint implicit-arrow-linebreak: ["error", "below"] */
(foo) => bar;
(foo) => (bar);
(foo) => bar => baz;
使用此规则与 "below"
选项的正确示例:
Open in Playground
/* eslint implicit-arrow-linebreak: ["error", "below"] */
(foo) =>
bar;
(foo) =>
(bar);
(foo) =>
bar =>
baz;
何时不用
如果你不关心隐式返回的箭头函数表达式的一致位置,你不应该打开这个规则。
如果你使用 arrow-body-style
和 "always"
选项,你也可以禁用此规则,因为这将禁用箭头函数中隐式返回的使用。
Related Rules
Version
This rule was introduced in ESLint v4.12.0.