Category: JavaScript

Sometimes, we want to make exe files from a Node.js app with JavaScript.

In this article, we’ll look at how to make exe files from a Node.js app with JavaScript.

How to make exe files from a Node.js app with JavaScript?

To make exe files from a Node.js app with JavaScript, we can use JXcore program.

We install it with

curl http://jxcore.com/xil.sh | bash

on Linux or download the binary install it on Windows.

Then we create an exe from our Node.js project by running

jx package app.js "myAppName" -native

app.js is the entry point file in our Node.js project.

'myAppName' is the app name and should be replace with our app’s name.

-native builds a native executable for the platform it’s currently on.

Conclusion

To make exe files from a Node.js app with JavaScript, we can use JXcore program.

Sometimes, we want to determine if an HTML element’s content overflows with JavaScript.

In this article, we’ll look at how to determine if an HTML element’s content overflows with JavaScript.

How to determine if an HTML element’s content overflows with JavaScript?

To determine if an HTML element’s content overflows with JavaScript, we can compare if the child element’s width is longer than the parent element’s width.

For instance, we write

const checkOverflow = (elem) => {
  const elemWidth = elem.getBoundingClientRect().width;
  const parentWidth = elem.parentElement.getBoundingClientRect().width;

  return elemWidth > parentWidth;
};

to get the elem element’s width with

elem.getBoundingClientRect().width

Then we get elem‘s parent’s width with

elem.parentElement.getBoundingClientRect().width;

Both widths are in pixels.

And if elemWidth is bigger than parentWidth, elem overflows the parent container.

Conclusion

To determine if an HTML element’s content overflows with JavaScript, we can compare if the child element’s width is longer than the parent element’s width.

Sometimes, we want to check if an element with the given ID has focus with JavaScript.

In this article, we’ll look at how to check if an element with the given ID has focus with JavaScript.

How to check if an element with the given ID has focus with JavaScript?

To check if an element with the given ID has focus with JavaScript, we can check if document.activeElement is the same element as the element with the given ID.

For instance, we write

const dummyEl = document.getElementById("myID");
const isFocused = document.activeElement === dummyEl;

to get the element with ID myID with getElementById.

Then we check if dummyEl is focused with

document.activeElement === dummyEl

Conclusion

To check if an element with the given ID has focus with JavaScript, we can check if document.activeElement is the same element as the element with the given ID.

Sometimes, we want to check if audio is playing with JavaScript.

In this article, we’ll look at how to check if audio is playing with JavaScript.

How to check if audio is playing with JavaScript?

To check if audio is playing with JavaScript, we can use the paused property of the audio element.

For instance, we write

const isPlaying = (audElem) => {
  return !audElem.paused;
};

to define the isPlaying function that returns !audElem.paused.

If audElem.paused is false, then the audio is playing.

audElem is the audio element.

Conclusion

To check if audio is playing with JavaScript, we can use the paused property of the audio element.

Sometimes, we want to capture response of form.submit with JavaScript.

In this article, we’ll look at how to capture response of form.submit with JavaScript.

How to capture response of form.submit with JavaScript?

To capture response of form.submit with JavaScript, we can listen for the form’s submit event.

For instance, we write

<form id="myFormId" action="/api/process/form" method="post">
  ...
  <button type="submit">Submit</button>
</form>

to add a form with some fields.

Then we write

document.forms["myFormId"].addEventListener("submit", async (event) => {
  event.preventDefault();
  const resp = await fetch(event.target.action, {
    method: "POST",
    body: new URLSearchParams(new FormData(event.target)),
  });
  const body = await resp.json();
  console.log(body);
});

to get the form with ID myFormId with

document.forms["myFormId"]

And we call addEventListener on it with 'submit' and the form submit event callback to submit the form when the submit button is clicked.

In the event handler callback, we call fetch with the event.target.action, which is the value of the form’s action attribute, and an object that has the request method and body.

We get the form data from the form with

new FormData(event.target)

And convert it to a query string with URLSearchParams.

Finally we get the response from resp.json.

Conclusion

To capture response of form.submit with JavaScript, we can listen for the form’s submit event.