no-duplicate-case
NOTE: this rule is part of the
推荐 rule set.Enable full set in
deno.json:{
"lint": {
"rules": {
"tags": ["推荐"]
}
}
}Enable full set using the Deno CLI:
deno lint --rules-tags=推荐
This rule can be explictly included to or excluded from the rules present in the current tag by adding it to the
include or exclude array in deno.json:{
"lint": {
"rules": {
"include": ["no-duplicate-case"],
"exclude": ["no-duplicate-case"]
}
}
}不允许在 switch 语句中重复使用相同的 case 子句。
当你在 switch 语句中重复使用一个 case 测试表达式时，重复的 case 将永远无法达到，这意味着这几乎总是一个错误。
无效：
const someText = "a";
switch (someText) {
case "a": // (1)
break;
case "b":
break;
case "a": // (1) 的重复
break;
default:
break;
}
有效：
const someText = "a";
switch (someText) {
case "a":
break;
case "b":
break;
case "c":
break;
default:
break;
}