import React from 'react' // 使用electron的功能 // const electron = window.require('electron') // 使用remote const { BrowserWindow } = window.require("@electron/remote") export default function App() { const openNew
If a default-initialized parameter comes before a required parameter, users need to explicitly pass undefined to get the default initialized value. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 function buildName(firstName: string, lastName = "Smith") { // ... } 2.1.4. Rest Parameters...
return "Pass" } else { return "Fail" } // Shorthand const mark = 80 return mark >= 65 ? "Pass" : "Fail" 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 02、短路评估 替换if...else 语句的另一种方法是使用短路评估。此技巧使用逻辑 OR 运算符 ||...
However, if you want to use a custom typescript package or pass some command-line options to the TypeScript Language Service, you can customize the default settings. In the Settings dialog (CtrlAlt0S) , go to Languages & Frameworks | TypeScript. Alternatively, click the Language Services ...
should not pass null or undefined. } }}let button = new UIElement();button.animate("ease-in");button.animate("uneasy"); // 错误，限制了只能使用 "ease-in"，"ease-out"，"ease-in-out" 三个之一 字符串字面量类型还可以用于区分函数重载：function createElement(tagName: "img"): HTMLIm...
functiondescribe(person:unknown):string{if(!isPerson(person)){thrownewError('`describe` requires you to pass a `Person`');}letname=person.name??'someone';return`${name}is${person.age}years old`;} 既然我们已经有了这个功能,我们可以将这里的person类型更新为Person来让 TypeScript 用户有更好的...
Therefore, I want to take a quick pass through the language to make sure we’re on the same page before addressing AngularJS 2.So, let’s talk some TypeScript.Adding “Type” to “Script”Conceptually, TypeScript is a straightforward idea: Take the traditional ECMA...
{store}> <React.StrictMode> <Routers /> </React.StrictMode> </Provider> ); // If you want to start measuring performance in your app, pass a function // to log results (for example: reportWebVitals(console.log)) // or send to an analytics endpoint. Learn more: https://bit.ly/...
a construct signature signals that you can pass inabstractconstructors. It doesn’t stop you from passing in other classes/constructor functions that are “concrete” – it really just signals that there’s no intent to run the constructor directly, so it’s safe to pass in either class ...
interface Bird { fly(); layEggs(); } interface Fish { swim(); layEggs(); } function getSmallPet(): Fish | Bird { // ... } let pet = getSmallPet(); pet.layEggs(); // okay pet.swim(); // errors 这里的联合类型可能有点复杂,但是你很容易就习惯了。如果一个值的类型是A | B...