TypeScript 5.1 Beta 发布_全球动态
OSCHINA
2023-04-19 11:06:36
【资料图】
TypeScript 5.1 发布了首个 Beta 测试版。
主要变化
更智能地检查未定义返回值的函数(undefined-Returning Functions) 旧代码
function foo() { // no return}// x = undefinedlet x = foo();// fine - we inferred that "f1" returns "void"function f1() { // no returns}// fine - "void" doesn"t need a return statementfunction f2(): void { // no returns}// fine - "any" doesn"t need a return statementfunction f3(): any { // no returns}// error!// A function whose declared type is neither "void" nor "any" must return a value.function f4(): undefined { // no returns}新代码
// Works in TypeScript 5.1!function f4(): undefined { // no returns}// Works in TypeScript 5.1!takesFunction((): undefined => { // no returns});// Works in TypeScript 5.1!takesFunction(function f() { // ^ return type is undefined // no returns});// Works in TypeScript 5.1!takesFunction(function f() { // ^ return type is undefined return;});typeRootsLinked Cursors for JSX Tags 对@paramJSDoc Tags自动补全 Snippet 其他优化 破坏性变更 详情查看发布公告。
