错误TS2339：属性'endsWith'不存在于类型'string' [英] error TS2339: Property 'endsWith' does not exist on type 'string'

问题描述

错误TS2339：属性'endsWith'不存在于类型'string'

  let myList = angular.element（elem）.attr（href）。split（ /）; 
 let last = _.last< string>（myList）; 
 if（last.endsWith（something））{
 return last; 
} 
  

我还发现这个链接显示有一个函数 endsWith（...）。

http://definitelytyped.org/docs/typescript-services--typescriptServices/classes/typescript.stringutilities.html

我想念一些 .d.ts 文件或什么？

解决方案

endsWith 是一个 ES6功能，因此您需要在TypeScript编译器设置中定位 ES6 ，或者可以添加界面为此：

  interface String {
 endsWith（searchString：string，endPosition ?: number）：boolean; 
}; 
  

[游乐场]

I get this error on the code block below.

error TS2339: Property 'endsWith' does not exist on type 'string'

let myList = angular.element(elem).attr("href").split("/");
let last = _.last<string>(myList);
if (last.endsWith("something")) {
   return last;
}

I have also discovered this link that shows that there is a function endsWith(...).

http://definitelytyped.org/docs/typescript-services--typescriptServices/classes/typescript.stringutilities.html

Do I miss some .d.ts file or what?

解决方案

endsWith is an ES6 function so you need to target ES6 in your TypeScript compiler settings or you can add an interface for it:

interface String {    
    endsWith(searchString: string, endPosition?: number): boolean;
};

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