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 vote122 views1 answer
Text field drag and drop reactjs
Javascript React
0 vote153 views1 answer
Create react app with vite
Javascript React
-1 vote135 views2 answers
How to validate date in react
Javascript React
6 votes134 views2 answers
React native password field
Javascript React
0 vote131 views1 answer
React native counter
Javascript React
0 vote128 views2 answers
Storage package npm react
Javascript React
15 votes126 views8 answers
React bootstrap
Javascript React
0 vote128 views1 answer
Mat slider in a reactve form
Javascript React
0 vote82 views1 answer
How to make a textarea unwritable in react native
Javascript React
63 votes118 views3 answers
Concat two arrays in react
Javascript React