嵌套条件

🌐 Nested conditions

除了直接映射,Node.js 还支持嵌套条件对象。

🌐 In addition to direct mappings, Node.js also supports nested condition objects.

例如,要定义一个只在 Node.js 中使用而不在浏览器中使用的具有双模式入口点的包:

🌐 For example, to define a package that only has dual mode entry points for use in Node.js but not the browser:

{
 "exports": {
 "node": {
 "import": "./feature-node.mjs",
 "require": "./feature-node.cjs"
 },
 "default": "./feature.mjs"
 }
} 拷贝

条件会按顺序继续匹配,就像平铺的条件一样。如果嵌套条件没有任何映射,它将继续检查父条件的其余条件。通过这种方式,嵌套条件的行为类似于嵌套的 JavaScript if 语句。

🌐 Conditions continue to be matched in order as with flat conditions. If a nested condition does not have any mapping it will continue checking the remaining conditions of the parent condition. In this way nested conditions behave analogously to nested JavaScript if statements.