no-negated-condition

禁止否定条件

否定条件更难理解。通过反转条件可以使代码更具可读性。

¥Negated conditions are more difficult to understand. Code can be made more readable by inverting the condition instead.

规则详情

¥Rule Details

此规则不允许以下任一情况的否定条件：

¥This rule disallows negated conditions in either of the following:

• 具有 else 分支的 if 语句

  ¥if statements which have an else branch

• 三元表达式

  ¥ternary expressions

此规则的错误代码示例：

¥Examples of incorrect code for this rule:

/*eslint no-negated-condition: "error"*/

if (!a) {
    doSomething();
} else {
    doSomethingElse();
}

if (a != b) {
    doSomething();
} else {
    doSomethingElse();
}

if (a !== b) {
    doSomething();
} else {
    doSomethingElse();
}

!a ? c : b
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此规则的正确代码示例：

¥Examples of correct code for this rule:

/*eslint no-negated-condition: "error"*/

if (!a) {
    doSomething();
}

if (!a) {
    doSomething();
} else if (b) {
    doSomething();
}

if (a != b) {
    doSomething();
}

a ? b : c
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版本

此规则是在 ESLint v1.6.0 中引入。

资源

• 规则源码
• 测试源码