React beforeunload

window.addEventListener('beforeunload', (event) => {
  event.returnValue = `Are you sure you want to leave?`;
});

Source: dev.to

React beforeunload

let formChanged = false;
myForm.addEventListener('change', () => formChanged = true);
window.addEventListener('beforeunload', (event) => {
  if (formChanged) {
    event.returnValue = 'You have unfinished changes!';
  }
});

Source: dev.to

Similar codes

0 vote246 views1 answer
React-google-invisible-recaptcha
Javascript React
4 votes240 views3 answers
Image react native base64
Javascript React
18 votes219 views3 answers
Add object to array react hook
Javascript React
32 votes228 views6 answers
Usestate react
Javascript React
140 votes358 views5 answers
React js installation
Javascript React
1 vote259 views1 answer
React event target square brackets
Javascript React
6 votes238 views1 answer
Remove yellow warning react native emulator
Javascript React
3 votes239 views2 answers
React native pm ERR! code EINTEGRITY
Javascript React
0 vote256 views2 answers
How to pass data in router link react-typescript
Javascript React
18 votes256 views2 answers
How to store an array in localstorage reactjs
Javascript React