Reactjs 减速器中的React Redux分配箭头功能警告
有人能告诉我为什么在我的React应用程序中收到此警告吗 src/reducers/posts.js 第3:1行:在导出为模块默认值之前,为变量指定箭头函数Reactjs 减速器中的React Redux分配箭头功能警告,reactjs,redux,react-redux,reducers,Reactjs,Redux,React Redux,Reducers,有人能告诉我为什么在我的React应用程序中收到此警告吗 src/reducers/posts.js 第3:1行:在导出为模块默认值之前,为变量指定箭头函数 向函数中添加变量: export default const variable = (posts = [], action) => { switch (action.type) { case FETCH_ALL: return action.payload; case U
向函数中添加变量:
export default const variable = (posts = [], action) => {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
JavaScript必须知道要导出什么将变量添加到函数中:
export default const variable = (posts = [], action) => {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
JavaScript必须知道您要导出什么您不能同时导出默认值和声明变量。 请尝试以下方法:
const variable = (posts = [], action) => {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
export default variable
或使用传统命名函数导出默认值:
export default function variable(posts = [], action) {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
不能同时导出默认值和声明变量。 请尝试以下方法:
const variable = (posts = [], action) => {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
export default variable
或使用传统命名函数导出默认值:
export default function variable(posts = [], action) {
switch (action.type) {
case FETCH_ALL:
return action.payload;
case UPDATE:
return posts.map((post) => post._id === action.payload._id ? action.payload : post);
case CREATE:
return [ ...posts, action.payload];
case DELETE:
return posts.filter((post) => post._id !== action.payload);
default:
return posts;
}
}
这个错误是不言自明的。将arrow函数指定给variable,然后将该变量导出为defaultWell。错误是不言自明的。将arrow函数分配给variable,然后将该变量导出为默认值,默认值可以使用对我有效的
modul.exports={variable}
!我分配了一个变量,然后在其他地方调用了解构。谢谢Roman。我得到了预期的TS1109:表达式。
或者可以使用对我有效的modul.exports={variable}
!我分配了一个变量,然后在其他地方调用了解构。谢谢Roman。我得到了TS1109:预期的表达式。