语法 返回 Promise 对象 Promise 对象的状态变化 await 命令 错误处理 使用注意点 语法 async 函数的语法规则总体上比较简单，难点是错误处理机制。 返回 Promise 对象 async 函数返回一个 Promise 对象。 async 函数内部return 语句返回的值，会成为then 方法回调函数的参...

第一部分: 半协程调度器 第一部分: 半协程调度器 谈及koa(1.x)首先得说co，co与Promise是JSer在解决回调地狱(callback hell)问题前仆后继的众多产物之一。 co其实是Generator的自动执行器(半协程调度器): 通过yield显式操纵控制流让我们可以做到以近乎同步的方式书写非阻塞代码。 Promise是一套比...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

API stability What “stable” means Stable APIs Exceptions Security fixes APIs marked as internal API stability Django promises API stability and forwards-compatibility sinc...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...

Assertions Assert Exists Equality Contains Regex Object Throws Custom Messages Custom Tests Assertions To help developers write tests the Deno standard library comes wi...