Category: JavaScript Answers

Sometimes, we want to fix Axios Network Error with React.

In this article, we’ll look at how to fix Axios Network Error with React.

How to fix Axios Network Error with React?

To fix Axios Network Error with React, we enable CORS in our back end.

For instance, we write

const app = express();
const cors = require("cors");

app.use(cors());

to add the cors middleware in our Express app.

Then we won’t get CORS error when we make requests to it.

We install cors by running

npm i cors

Conclusion

To fix Axios Network Error with React, we enable CORS in our back end.

Sometimes, we want to block device rotation on mobile web pages with JavaScript.

In this article, we’ll look at how to block device rotation on mobile web pages with JavaScript.

How to block device rotation on mobile web pages with JavaScript?

To block device rotation on mobile web pages with JavaScript, we call the screen.orientation.lock or screen.lockOrientation method.

For instance, we write

screen.orientation.lock();

to lock the screen to the current orientation.

Or we write

screen.lockOrientation("portrait-primary");

to call screen.lockOrientation to lock the screen to the normal portrait orientation.

We can also call it with 'portrait-secondary' to lock it in the upside down portrait mode.

'landscape-primary' locks it to the normal landscape mode.

'landscape-secondary' locks it to the upside down landscape mode.

Conclusion

To block device rotation on mobile web pages with JavaScript, we call the screen.orientation.lock or screen.lockOrientation method.

Sometimes, we want to capture window.onbeforeunload with JavaScript.

In this article, we’ll look at how to capture window.onbeforeunload with JavaScript.

How to capture window.onbeforeunload with JavaScript?

To capture window.onbeforeunload with JavaScript, we return a value in the method.

For instance, we write

window.onbeforeunload = () => {
  return false;
};

to return false in window.onbeforeunload to show an alert box.

Conclusion

To capture window.onbeforeunload with JavaScript, we return a value in the method.

Sometimes, we want to force a line break on a JavaScript concatenated string.

In this article, we’ll look at how to force a line break on a JavaScript concatenated string.

How to force a line break on a JavaScript concatenated string?

To force a line break on a JavaScript concatenated string, we add the '\n' string.

For instance, we write

document.getElementById("address_box").value =
  title + "\n" + address + "\n" + address2 + "\n" + address3 + "\n" + address4;

to put a new line between each string variable with '\n'.

And then we set that as the value of the text area with ID address_box.

Conclusion

To force a line break on a JavaScript concatenated string, we add the '\n' string.

Sometimes, we want to change value of input and submit form in JavaScript.

In this article, we’ll look at how to change value of input and submit form in JavaScript.

How to change value of input and submit form in JavaScript?

To change value of input and submit form in JavaScript, we can set the value property of the input.

For instance, we write

<form id="myForm" action="action.php">
  <input type="hidden" name="myInput" value="0" id="myInput" />
  <input type="text" name="message" value="" />
  <input type="submit" name="submit" />
</form>

to add a form.

Then we write

const myForm = document.getElementById("myForm");

myform.onsubmit = () => {
  document.getElementById("myInput").value = "1";
  myForm.submit();
};

to call getElementById to get the form.

Then we set its onsubmit property to a function that’s called when we submit the form.

In it, we get the input with getElementById and set its value to '1'.

And then we call submit to submit the form.

Conclusion

To change value of input and submit form in JavaScript, we can set the value property of the input.