Category: JavaScript

Sometimes, we want to get the HTML for a DOM element in JavaScript.

In this article, we’ll look at how to get the HTML for a DOM element in JavaScript.

How to get the HTML for a DOM element in JavaScript?

To get the HTML for a DOM element in JavaScript, we can use the outerHTML property.

For instance, we write

const el = document.getElementById("foo");
console.log(el.outerHTML);

to select the element with getElementById.

Then we use the outerHTML property to get the HTML string for the element.

Conclusion

To get the HTML for a DOM element in JavaScript, we can use the outerHTML property.

Sometimes, we want to detect if a variable is an array with JavaScript.

In this article, we’ll look at how to detect if a variable is an array with JavaScript.

How to detect if a variable is an array with JavaScript?

To detect if a variable is an array with JavaScript, we use the Array.isArray method.

For instance, we write

const isArray = Array.isArray([]);

to check if the empty array is an array with Array.isArray.

It should return true since it’s an array.

Otherwise, it’ll return false.

Conclusion

To detect if a variable is an array with JavaScript, we use the Array.isArray method.

Sometimes, we want to remove numbers from a string with JavaScript.

In this article, we’ll look at how to remove numbers from a string with JavaScript.

How to remove numbers from a string with JavaScript?

To remove numbers from a string with JavaScript, we can use the string replace method with a regex.

For instance, we write

const newQuestionText = questionText.replace(/[0-9]/g, "");

to call questionText.replace with the /[0-9]/g regex to match all numbers in the questionText string.

Then we replace them all with empty strings.

Conclusion

To remove numbers from a string with JavaScript, we can use the string replace method with a regex.

Sometimes, we want to do case insensitive replace all with JavaScript.

In this article, we’ll look at how to do case insensitive replace all with JavaScript.

How to do case insensitive replace all with JavaScript?

To do case insensitive replace all with JavaScript, we can use a regex.

For instance, we write

const searchMask = "is";
const regEx = new RegExp(searchMask, "ig");
const replaceMask = "as";

const result = "This iS IIS".replace(regEx, replaceMask);

to create a regex with the RegExp constructor.

searchMask is the pattern we’re looking to replace.

i makes the regex match in a case insensitive manner.

g makes the regex search for all matches of the pattern.

Then we call replace with regEx and the replaceMask that we want to replace the matched strings with.

Conclusion

To do case insensitive replace all with JavaScript, we can use a regex.

Sometimes, we want to focus input box on load with JavaScript.

In this article, we’ll look at how to focus input box on load with JavaScript.

How to focus input box on load with JavaScript?

To focus input box on load with JavaScript, we can call the input element’s focus method.

For instance, we write

<input id="myinputbox" type="text" />

to add an input element.

Then we write

window.onload = () => {
  document.getElementById("myinputbox").focus();
};

to select the input with getElementById.

Then we call focus on it to focus it.

We put the code in window.onload to run it when the input is loaded.

Conclusion

To focus input box on load with JavaScript, we can call the input element’s focus method.