importdefaultMemberfrom"module-name";import*asnamefrom"module-name";import{member}from"module-name";import{memberasalias}from"module-name";import{member1,member2}from"module-name";import{member1,member2asalias2,[...]}from"module-name";importdefaultMember,{member[,[...]]}from"module-name";...
import { member1 , member2 as alias2 , [...] } from "module-name"; import defaultMember, { member [ , [...] ] } from "module-name"; import defaultMember, * as name from "module-name"; import "module-name"; name 用来接收导入的值的对象的名称; member, memberN 要导入的外部模块...
// public 公有属性 , ts默认为public class Animal1 { public name: string; // 自己, 子类和实例都可以访问 private age: number = 2; // 自己可以访问, 子类 和 实例 都不可以访问, protected body: string; // 自己和子类可以访问, 实例不可以访问 public constructor(name: string, age: number) ...
在导入时,我们还可以使用as关键字为导入的成员指定别名,这在避免命名冲突或简化代码时非常有用: // 使用别名导入变量import{ myVariableasvariableAlias }from'./myModule';console.log(variableAlias);// 输出:Hello, TypeScript!// 使用别名导入默认导出的类importDefaultClassasMyCustomClassfrom'./myModule';con...
TypeScript allows us to mark a class as abstract. This tells TypeScript that the class is only meant to be extended from, and that certain members need to be filled in by any subclass to actually create an instance. Copy abstract class Shape { abstract getArea(): number; } // Error!
The above code tells the TypeScript compiler to resolve imports from the @/* alias to the ./src/* directory. Once you set up the path alias, you can use it in your import statements.For example, you can import a Button component in the src/components directory directly from anywhere in...
yarnadd-D@babel/plugin-proposal-class-properties@babel/plugin-proposal-object-rest-spread 这里如果读者有时间,我推荐这篇深入了解babel的文章:一口(很长的)气了解 babel - 知乎 (zhihu.com)。当然,如果这口气憋不住(哈哈),我做一个简单摘抄: babel 总共分为三个阶段:解析,转换,生成。
模块名的解析和用import/export解析模块标识符的方式是一致的。更多信息请参考 Modules。当这些声明在扩展中合并时,就好像在原始位置被声明了一样。但是,你不能在扩展中声明新的顶级声明-仅可以扩展模块中已经存在的声明。 全局扩展 你也以在模块内部添加声明到全局作用域中。 // observable.ts export class Observab...
import { Entity, Column, PrimaryGeneratedColumn } from 'typeorm'; @Entity() export class User { @PrimaryGeneratedColumn() id!: number; @Column() name!: string; @Column() email!: string } 1. 2. 3. 4. 5. 6. 7. 8. 9.
</template> <script lang="ts"> import { Options, Vue } from "vue-class-component"; import HelloWorld from "@/components/HelloWorld.vue"; // @ is an alias to /src @Options({ components: { HelloWorld, }, }) export default class Home extends Vue { print() { const helloRef = this....