operator-linebreak

为操作员强制执行一致的换行样式

一些该规则报告的问题可以通过 --fix 命令行选项 自动修复

当一条语句太长而不能放在一行中时，通常会在分隔表达式的运算符旁边插入换行符。想到的第一个样式是将运算符放在行尾，遵循英语标点规则。

var fullHeight = borderTop +
                 innerHeight +
                 borderBottom;

一些开发人员发现将运算符放在行首会使代码更具可读性。

var fullHeight = borderTop
               + innerHeight
               + borderBottom;

规则详情

此规则为运算符强制执行一致的换行样式。

选项

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after

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/*eslint operator-linebreak: ["error", "after"]*/

foo = 1
+
2;

foo = 1
    + 2;

foo
    = 5;

if (someCondition
    || otherCondition) {
}

answer = everything
  ? 42
  : foo;

class Foo {
    a
        = 1;
    [b]
        = 2;
    [c
    ]
        = 3;
}

1tb+eDg9lr3kv3DONP/OObSuk6aZO9aEjdXhGxbbjPoHGJTP1fCxabHyy5I+ND7kPnAkNU6tlDG6VcoJ4xbEoBPP3C8dW4x4/qyFKkuOamg=

/*eslint operator-linebreak: ["error", "after"]*/

foo = 1 + 2;

foo = 1 +
      2;

foo =
    5;

if (someCondition ||
    otherCondition) {
}

answer = everything ?
  42 :
  foo;

class Foo {
    a =
        1;
    [b] =
        2;
    [c
    ] =
        3;
    d = 4;
}

before

1tb+eDg9lr3kv3DONP/OOQ9YvX9pDbGr05sVsXRFUSFVTISzomhonHczbYZjrHyfH4IISBLqX3gFsppwSAf2znn+savL8up+IV9w5+kHCRg=

/*eslint operator-linebreak: ["error", "before"]*/

foo = 1 +
      2;

foo =
    5;

if (someCondition ||
    otherCondition) {
}

answer = everything ?
  42 :
  foo;

class Foo {
    a =
        1;
    [b] =
        2;
    [c
    ] =
        3;
}

1tb+eDg9lr3kv3DONP/OOQ9YvX9pDbGr05sVsXRFUSHU25O5HmsOq+q78PIU1fpxP0z1bt7/ZbiSS471WP1mmh1X9F7yWOf5CFNLwlPDqfk=

/*eslint operator-linebreak: ["error", "before"]*/

foo = 1 + 2;

foo = 1
    + 2;

foo
    = 5;

if (someCondition
    || otherCondition) {
}

answer = everything
  ? 42
  : foo;

class Foo {
    a
        = 1;
    [b]
        = 2;
    [c
    ]
        = 3;
    d = 4;
}

none

1tb+eDg9lr3kv3DONP/OOd3shW4oET76epOWpPS3cItvHyAheA0V/p3GkmpPsfw6yTr3p+PGZdnn8mrx9joaw25nNghiESl/HigbxTnsvfo=

/*eslint operator-linebreak: ["error", "none"]*/

foo = 1 +
      2;

foo = 1
    + 2;

if (someCondition ||
    otherCondition) {
}

if (someCondition
    || otherCondition) {
}

answer = everything
  ? 42
  : foo;

answer = everything ?
  42 :
  foo;

class Foo {
    a =
        1;
    [b] =
        2;
    [c
    ] =
        3;
    d
        = 4;
    [e]
        = 5;
    [f
    ]
        = 6;
}

1tb+eDg9lr3kv3DONP/OOd3shW4oET76epOWpPS3cItzIPIcwZLZ7IGEdiB0hre2ybcb3blsrawvxn+M/AIqSNiJJPp/Na4TVqKbVaXZKpo=

/*eslint operator-linebreak: ["error", "none"]*/

foo = 1 + 2;

foo = 5;

if (someCondition || otherCondition) {
}

answer = everything ? 42 : foo;

class Foo {
    a = 1;
    [b] = 2;
    [c
    ] = 3;
    d = 4;
    [e] = 5;
    [f
    ] = 6;
}

overrides

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/*eslint operator-linebreak: ["error", "after", { "overrides": { "+=": "before" } }]*/

var thing = 'thing';
thing +=
  's';

1tb+eDg9lr3kv3DONP/OOX9atnnBsyAudPAesCzPu6TMBZMwtHFiwEGERbpaYNLoQEmYjgIwdoHDu+KbQ/paaCEoCmffOhoeLeJuT39m+rUsE1aQKtNtutun6z054QOfG8bAbP+lLS+v5wghsnmfAg==

/*eslint operator-linebreak: ["error", "after", { "overrides": { "+=": "before" } }]*/

var thing = 'thing';
thing
  += 's';

1tb+eDg9lr3kv3DONP/OOX9atnnBsyAudPAesCzPu6TvBWs/5i3TL8e6pVvlPdfwpXEAhq6uasQzwRM2yNKSKq9rpLhMYtJNbAb/rCp51VAro6UXud2Erh4zNwJ/TLs5kCOaoVB/1zjbHVuJPp3jSBvCIPkM8nOAWpDiFq2uRYY=

/*eslint operator-linebreak: ["error", "after", { "overrides": { "?": "ignore", ":": "ignore" } }]*/

answer = everything ?
  42
  : foo;

answer = everything
  ?
  42
  :
  foo;

L+G0pIYY6HS+68htOSqeL28y5hlfvDHE/jKyKCbX4Xm3LVCxMscjJXuz6VEqwtZwDrscvXnLy1FmbaaSvhl11PnNrUjZQmoFHm380WAHfs1bA5MbzJlCRSZvVyfjeaB5vg4ndcCLlVqwueHcbfi3Zl93EiCxsCiSWBfGcsA1Vaw=

/*eslint operator-linebreak: ["error", "after", { "overrides": { "?": "before", ":": "before" } }]*/

foo = 1
+
2;

foo = 1
    + 2;

foo
    = 5;

if (someCondition
    || otherCondition) {
}

answer = everything ?
  42 :
  foo;

L+G0pIYY6HS+68htOSqeL28y5hlfvDHE/jKyKCbX4Xm3LVCxMscjJXuz6VEqwtZwDrscvXnLy1FmbaaSvhl11PnNrUjZQmoFHm380WAHfs1bA5MbzJlCRSZvVyfjeaB5w4W6LbxjdI6K7HGQtyrh7+xi5wt5wBEe6Q4QS/eQHic=

/*eslint operator-linebreak: ["error", "after", { "overrides": { "?": "before", ":": "before" } }]*/

foo = 1 + 2;

foo = 1 +
      2;

foo =
    5;

if (someCondition ||
    otherCondition) {
}

answer = everything
  ? 42
  : foo;

何时不使用

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