The 'Navigator' type does not contain a property called 'wakeLock'

I am facing an issue with using the Screen Wake Lock API in my Angular app. The code snippet I tried to use is:

if ('wakeLock' in navigator) {
         await navigator.wakeLock.request();
        
}

However, when trying to compile my Angular app, I encountered the following error message:

Error: src/app/feature/test/test/test.component.ts:20:42 - error TS2339: Property 'wakeLock' does not exist on type 'Navigator'.

Here is some information about my Angular setup:

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 13.0.3
Node: 16.13.0
Package Manager: npm 8.1.0
OS: win32 x64

Angular: 13.0.2
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1300.3
@angular-devkit/build-angular   13.0.3
@angular-devkit/core            13.0.3
@angular-devkit/schematics      13.0.3
@angular/cdk                    13.0.3
@angular/cli                    13.0.3
@angular/flex-layout            13.0.0-beta.36
@angular/material               13.0.3
@schematics/angular             13.0.3
rxjs                            6.6.7
typescript                      4.4.4

I need assistance with fixing TypeScript so that it recognizes the Screen Wake Lock API and successfully compiles the code. Any help would be appreciated.

angulartypescriptnavigator

Answer №1

Here's how I got it to work:

let nav: any = navigator;
if ('wakeLock' in navigator) {
  nav["wakeLock"].request("screen");
}

Initially, I attempted to include the DefinitelyTyped definition to resolve editor errors, but compilation issues persisted. The solution was simply assigning the navigator object to an any type variable, allowing for flexible property and method calls without strict typing.

The conditional statement ensures that wakelock is supported by the browser before making the call.

Answer №2

After a lengthy two-week search, I finally discovered a solution that involves integrating DefinitelyTyped to provide the necessary support. Following a simple two-step process can resolve this issue effectively.

  1. Begin by installing the @types/dom-screen-wake-lock package
npm i @types/dom-screen-wake-lock -D
  1. Once the package is installed, it is crucial to add types to the tsconfig.json file in the following manner
{
...
   "compilerOptions":{
...
         "types":[
...
              "dom-screen-wake-lock"
...
            ]
...
}
...
}

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