Npm gives depreciated errors when trying to install firebase tools for flutter-CodePudding

I get the following when I run "npm install -g firebase-tools" on Node.js command prompt.

C:\Users\DELL>npm install -g firebase-tools
npm WARN deprecated [email protected]: this library is no longer supported
npm WARN deprecated [email protected]: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)
npm WARN deprecated [email protected]: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)
npm WARN deprecated [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
npm WARN deprecated [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142

changed 687 packages, and audited 688 packages in 2m

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21 vulnerabilities (15 moderate, 6 high)

CodePudding user response：

try npm cache verify, then try again and let me know if that works!