The absence of essential DOM types in a TypeScript project is causing issues

Recently, I've been working on setting up a web app in TypeScript but I seem to be missing some essential types that are required.

Every time I compile using npm run build, it keeps throwing errors like:

Error TS2304: Cannot find name 'HTMLElement'.

Error TS2304: Cannot find name 'SVGElement'.

Error TS2304: Cannot find name 'EventTarget'.

Error TS2304: Cannot find name 'TouchEvent'.

Error TS2304: Cannot find name 'MouseEvent'.

Error TS2304: Cannot find name 'PointerEvent'.

After doing some research, it seems like these types should already be included with Typescript by default and might be part of the ES6 types. Specifically, they can be found in this link: https://github.com/Microsoft/TypeScript/blob/master/lib/lib.es6.d.ts.

Below is an excerpt from my package.json file:

{
  "name": "wip",
  "version": "1.0.0",
  "description": "",
  "main": "index.html",
  "dependencies": {
    "hammerjs": "2.0.8"
  },
  "devDependencies": {
    …
  },
  "scripts": {
    "test": "mocha test --require ts-node/register test/**/*.ts && npm run build",
    "dev": "webpack-dev-server --watch --content-base . -d --progress",
    "build": "tsc"
  },
  "author": "",
  "license": "ISC"
}

Does anyone have any suggestions on how to fix this issue?

javascripttypescriptnpm

Answer №1

For improved functionality, include the subsequent lib segment in your tsconfig.json.

{
    "compilerOptions": {
        "lib": [
            "es2016",
            "dom"
        ]
    }
}

Answer №2

Another answer provided for testing purposes.

If you are working with mocha, it is important to inform mocha about the DOM environment by using jsdom.

$ npm install jsdom jsdom-global --save-dev

In your "test" script, make sure to include -r jsdom-global/register:

{
  "scripts": {
    "test": "mocha test -r ts-node/register -r jsdom-global/register test/**/*.ts && npm run build"
  }
}

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