Category: JavaScript Answers

Sometimes, we want to auto select an input field and the text in it on page load with JavaScript.

In this article, we’ll look at how to auto select an input field and the text in it on page load with JavaScript.

How to auto select an input field and the text in it on page load with JavaScript?

To auto select an input field and the text in it on page load with JavaScript, we can use the focus and select methods.

For instance, we write

<input id="myTextInput" value="Hello world!" />

to add an input.

Then we write

const input = document.getElementById("myTextInput");
input.focus();
input.select();

to select the input with getElementById.

Then we call focus to focus on the input.

And we call select to select the input value.

Conclusion

To auto select an input field and the text in it on page load with JavaScript, we can use the focus and select methods.

Sometimes, we want to create an array if an array does not exist yet with JavaScript.

In this article, we’ll look at how to create an array if an array does not exist yet with JavaScript.

How to create an array if an array does not exist yet with JavaScript?

To create an array if an array does not exist yet with JavaScript, we can use the Array.isArray method.

For instance, we write

const list = Array.isArray(x) ? x : [x];

to check if x is an array with Array.isArray.

If it is, then we assign x to list.

Otherwise, we assign an array with x in it to list.

Conclusion

To create an array if an array does not exist yet with JavaScript, we can use the Array.isArray method.

Sometimes, we want to get the date 7 days after today with JavaScript.

In this article, we’ll look at how to get the date 7 days after today with JavaScript.

How to get the date 7 days after today with JavaScript?

To get the date 7 days after today with JavaScript, we can use the getDate and setDate methods.

For instance, we write

const date = new Date();
date.setDate(date.getDate() + 7);

console.log(date);

to create a Date object with the current date and time.

Then we call getDate to get the current day of the month.

And then we call setDate with the current day of the month plus 7 to set date to 7 days after today.

Conclusion

To get the date 7 days after today with JavaScript, we can use the getDate and setDate methods.

Sometimes, we want to remove the zoom control with LeafletJS.

In this article, we’ll look at how to remove the zoom control with LeafletJS.

How to remove the zoom control with LeafletJS?

To remove the zoom control with LeafletJS, we can set the zoomControl option to false.

For instance, we write

const map = new L.map("map", { zoomControl: false });

to create a map with the L.map function.

We call it with an object with the zoomControl property set to false to remove the zoom control from the map.

Conclusion

To remove the zoom control with LeafletJS, we can set the zoomControl option to false.

Sometimes, we want to smooth scroll to top with JavaScript.

In this article, we’ll look at how to smooth scroll to top with JavaScript.

How to smooth scroll to top with JavaScript?

To smooth scroll to top with JavaScript, we call the window.scrollTo method.

For instance, we write

window.scrollTo({ top: 0, behavior: "smooth" });

to call window.scrollTo with an object that specifies that we scroll to top position 0 and the scroll behavior is smooth to scroll to the top of the page with smooth scrolling.

Conclusion

To smooth scroll to top with JavaScript, we call the window.scrollTo method.