Node.js 15 dependency problem with pullstate 1.20.x - node.js

Question

i want to use pullstate.js in my react project but it seems to be impossible to use it with the Node.js 15.
I have tried it in Node.js 13 and there it works. Can Anybody help?
In this example i created a plain react app and try to add the dependency.
package,json
``
{
"name": "my-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"#popperjs/core": "^2.9.0",
"#testing-library/jest-dom": "^5.11.9",
"#testing-library/react": "^11.2.5",
"#testing-library/user-event": "^12.8.1",
"ajv": "^6.12.6",
"bootstrap": "^4.5.3",
"moment": "^2.29.1",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.3",
"web-vitals": "^1.1.0",
"pullstate":"1.20.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
``
This ist the rror i get after npm install.
code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: my-app#0.1.0
npm ERR! Found: react#17.0.1
npm ERR! node_modules/react
npm ERR! react#"^17.0.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer react#"^16.12.0" from pullstate#1.20.1
npm ERR! node_modules/pullstate
npm ERR! pullstate#"1.20.1" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

Answer 1

This is unfortunately due to NPM version 7 being way more strict about peer dependency mismatches.
To get the old behaviour, run npm install with --legacy-peer-deps, as they say in the error message.
I've just released Pullstate version 1.21.0 - this has set a more broad peer dependency for React, including ^1.17.0 - I think this should solve this issue.