ESLintrequire or disallow spacing between function identifiers and their invocations (func-call-spacing)
要求或禁止在函数标识符和其调用之间有空格 (func-call-spacing)
The --fix option on the command line can automatically fix some of the problems reported by this rule.
命令行中的 --fix 选项可以自动修复一些该规则报告的问题。
When calling a function, developers may insert optional whitespace between the function’s name and the parentheses that invoke it. The following pairs of function calls are equivalent:
当调用一个函数时，开发者可以在函数名和调用它的括号之间插入空格。以下函数调用效果是一样的：
alert('Hello');
alert ('Hello');
console.log(42);
console.log (42);
new Date();
new Date ();
Rule Details
This rule requires or disallows spaces between the function name and the opening parenthesis that calls it.
该规则要求或禁止在函数名和开括号之间有空格。
options
This rule has a string option:
该规则有一个字符串选项：
"never"(default) disallows space between the function name and the opening parenthesis."never"(默认) 禁止在函数名和开括号之间有空格"always"requires space between the function name and the opening parenthesis."always"要求在函数名和开括号之间有空格
Further, in "always" mode, a second object option is available that contains a single boolean allowNewlines property.
未来，在 "always" 模式中，可以有第二个选项，是个对象，包含一个布尔类型的 allowNewlines 属性。
never
Examples of incorrect code for this rule with the default "never" option:
默认选项 "never" 的 错误 代码示例：
/*eslint func-call-spacing: ["error", "never"]*/
fn ();
fn
();
Examples of correct code for this rule with the default "never" option:
默认选项 "never" 的 正确 代码示例：
/*eslint func-call-spacing: ["error", "never"]*/
fn();
always
Examples of incorrect code for this rule with the "always" option:
选项 "always" 的 错误 代码示例：
/*eslint func-call-spacing: ["error", "always"]*/
fn();
fn
();
Examples of correct code for this rule with the "always" option:
选项 "always" 的 正确 代码示例：
/*eslint func-call-spacing: ["error", "always"]*/
fn ();
allowNewlines
By default, "always" does not allow newlines. To permit newlines when in "always" mode, set the allowNewlines option to true. Newlines are never required.
默认情况下，"always" 不允许换行。在 "always" 模式中，设置 allowNewlines 选项为 true 来允许换行。换行从来就不是必须的。
Examples of incorrect code for this rule with allowNewlines option enabled:
选项 { "allowNewlines": true } 的 错误 代码示例：
/*eslint func-call-spacing: ["error", "always", { "allowNewlines": true }]*/
fn();
Examples of correct code for this rule with the allowNewlines option enabled:
选项 { "allowNewlines": true } 的 正确 代码示例：
/*eslint func-call-spacing: ["error", "always", { "allowNewlines": true }]*/
fn (); // Newlines are never required.
fn
();
When Not To Use It
This rule can safely be turned off if your project does not care about enforcing a consistent style for spacing within function calls.
如果你的项目并不关心在函数调用中强制使用一致的空格风格，你可以关闭此规则。
Related Rules
- no-spaced-func (deprecated)
Compatibility
Version
This rule was introduced in ESLint 3.3.0.
该规则在 ESLint 3.3.0 中被引入。