全局(从模块内部)向原型添加函数 [英] Add a function to a prototype globally (from within a module)
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问题描述
我想从一个模块中向Typescript(1.8)中的Array原型添加一个函数.
I want to add a function to the Array prototype in Typescript (1.8) from within a module.
我正在更改utils.ts文件中的原型:
I am altering the prototype in my utils.ts file:
declare global {
interface Array<T> {
remove(obj: any): void;
}
}
Array.prototype.remove = function(obj) {
var idx = this.indexOf(obj);
if (idx > -1) {
this.splice(idx, 1);
}
}
现在我想以某种方式在我的main.ts文件中全局应用此更改:
And now I would like to apply that change globally in my main.ts file somehow like this:
import {Array<T>.remove} from "./utils.ts"
let arr = ["an", "array"];
arr.remove("array");
我可以导入接口声明,但是对Array原型的更改在main.ts文件中不可用.如何更改原型并在全球范围内应用,或以某种方式导入该删除"功能?
I can import the interface declaration but the change to the prototype of Array is not available in the main.ts file. How can I make a change to a prototype and apply that globally or somehow import that "remove" functionality?
推荐答案
这对我有用:
test.ts:
export {};
declare global {
interface Array<T> {
remove(obj: any): void;
}
}
Array.prototype.remove = function(obj) {
var idx = this.indexOf(obj);
if (idx > -1) {
this.splice(idx, 1);
}
}
test2.ts:
import "./test";
let arr = ["an", "array"];
arr.remove("array");
console.log(arr);
编译并运行:
tsc -m "commonjs" ./test2.ts
node ./test2.js
输出:
[ 'an' ]
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