How to copy to the clipboard on button click with JavaScript?

To copy to the clipboard on button click with JavaScript, we use the Clipboard API.

For instance, wwe write

document.querySelector(".copy-text").addEventListener("click", async () => {
  await navigator.clipboard.writeText(textToCopy);
  window.alert("Success! The text was copied to your clipboard");
});

to call navigator.clipboard.writeText with the textToCopy to copy the string to the clipboard.

We call addEventListener to add the function with the code as the click listener for the element with class copy-text.

How to make a div into a link with JavaScript?

To make a div into a link with JavaScript, we can make it navigate to a URL on click.

For instance, we write

<div
  onclick="location.href='http://www.example.com';"
  style="cursor: pointer"
></div>

to make the div navigate to http://www.example.com on click by setting location.href to 'http://www.example.com' in the onclick attribute.

And we set the cursor style to pointer to change the cursor to a pointer when we move our mouse over the div.

How to add multiple classes to a ReactJS Component?

To add multiple classes to a ReactJS Component, we can set the className propt to a string with the classes separated by spaces.

For instance, we write

<li className={[activeClass, data.klass, "main-class"].join(" ")}>...</li>;

to join the activeClass, data.klass and 'main-class strings together with join.

Then all the classes are applied to the li element.

How to load up CSS files using JavaScript?

Sometimes, we want to load up CSS files using JavaScript.

In this article, we’ll look at how to load up CSS files using JavaScript.

How to load up CSS files using JavaScript?

To load up CSS files using JavaScript, we create a link element with createElement.

For instance, we write

const element = document.createElement("link");
element.setAttribute("rel", "stylesheet");
element.setAttribute("type", "text/css");
element.setAttribute("href", "external.css");
document.head.appendChild(element);

to create a link element with createElement.

Then we call setAttribute to set the rel, type, and href attribute values.

Finally, we call document.head.appendChild to append the link element as the last child element of the head element.

Conclusion

To load up CSS files using JavaScript, we create a link element with createElement.

How to get div height with plain JavaScript?

Sometimes, we want to get div height with plain JavaScript.

In this article, we’ll look at how to get div height with plain JavaScript.

How to get div height with plain JavaScript?

To get div height with plain JavaScript, we use the clientHeight or offsetHeight properties.

For instance, we write

const clientHeight = document.getElementById("myDiv").clientHeight;
const offsetHeight = document.getElementById("myDiv").offsetHeight;

to get the div with getElementById.

Then we get the div’s height with the clientHeight and offsetHeight properties.

clientHeight includes the padding with the height.

And offsetHeight includes padding, scrollbar and border heights.

Conclusion

To get div height with plain JavaScript, we use the clientHeight or offsetHeight properties.

How to check if an element contains a class in JavaScript?

Sometimes, we want to check if an element contains a class in JavaScript.

In this article, we’ll look at how to check if an element contains a class in JavaScript.

How to check if an element contains a class in JavaScript?

To check if an element contains a class in JavaScript, we use classList.

For instance, we write

const hasClassName = element.classList.contains(className);

to check if the className class exists in the element with classList.contains.

Conclusion

To check if an element contains a class in JavaScript, we use classList.

How to add a conditional class with Angular *ngClass and JavaScript?

Sometimes, we want to add a conditional class with Angular *ngClass and JavaScript.

In this article, we’ll look at how to add a conditional class with Angular *ngClass and JavaScript.

How to add a conditional class with Angular *ngClass and JavaScript?

To add a conditional class with Angular *ngClass and JavaScript, we can use the class or ngClass attributes.

For instance, we write

<div [class.my_class]="step === 'step1'"></div>

to set the my_class class when step equals 'step1'.

We can also write

<div [ngClass]="{ my_class: step === 'step1' }"></div>

to do the same thing.

Conclusion

To add a conditional class with Angular *ngClass and JavaScript, we can use the class or ngClass attributes.

How to select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript?

Sometimes, we want to select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript.

In this article, we’ll look at how to select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript.

How to select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript?

To select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript, we can add a stylesheet dynamically.

For instance, we write

const str = "bar";
document.styleSheets[0].addRule("p.special:before", 'content: "' + str + '";');

to add a style rule for the part of the p element with class special.

We set the content property to the str string.

Conclusion

To select and manipulate CSS pseudo-elements such as ::before and ::after using JavaScript, we can add a stylesheet dynamically.

How to retrieve the position (X,Y) of an HTML element with JavaScript?

Sometimes, we want to retrieve the position (X,Y) of an HTML element with JavaScript.

In this article, we’ll look at how to retrieve the position (X,Y) of an HTML element with JavaScript.

How to retrieve the position (X,Y) of an HTML element with JavaScript?

To retrieve the position (X,Y) of an HTML element with JavaScript, we use the getBoundingClientRect method.

For instance, we write

const { top, right, bottom, left } = element.getBoundingClientRect();
console.log(top, right, bottom, left);

to call the element.getBoundingClientRect method to return the position of the element.

We get the top, right, bottom, and left position from the object returned.

Conclusion

To retrieve the position (X,Y) of an HTML element with JavaScript, we use the getBoundingClientRect method.