Categories
HTML

How to load images dynamically or lazily when users scrolls them into view with HTML?

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Sometimes, we want to load images dynamically or lazily when users scrolls them into view with HTML.

In this article, we’ll look at how to load images dynamically or lazily when users scrolls them into view with HTML.

How to load images dynamically or lazily when users scrolls them into view with HTML?

To load images dynamically or lazily when users scrolls them into view with HTML, we can set the loading attribute to lazy.

For instance, we write

<img src="http://placeimg.com/640/360/any" loading="lazy" />

to set the loading attribute to lazy.

Then the image will be loaded only when it’s visible.

Conclusion

To load images dynamically or lazily when users scrolls them into view with HTML, we can set the loading attribute to lazy.

Categories
JavaScript Answers

How to change text node value with JavaScript?

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Sometimes, we want to change text node value with JavaScript.

In this article, we’ll look at how to change text node value with JavaScript.

How to change text node value with JavaScript?

To change text node value with JavaScript, we can set the nodeValue property.

For instance, we write

node.nodeValue = "new value";

to set the text node‘s nodeValue to a string.

Setting nodeValue will only set the value of the text node and not affect descending nodes.

Conclusion

To change text node value with JavaScript, we can set the nodeValue property.

Categories
React Answers

How to access store state in React Redux and JavaScript?

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Sometimes, we want to access store state in React Redux and JavaScript.

In this article, we’ll look at how to access store state in React Redux and JavaScript.

How to access store state in React Redux and JavaScript?

To access store state in React Redux and JavaScript, we can use the useSelector hook.

For instance, we write

import { useSelector } from "react-redux";

export const useEmployees = () => {
  return useSelector((state) => state.employees);
};

to create the useEmployees hook.

In it, we call the useSelector hook that select the employees state from the Redux store.

Then, we write

const Comp = () => {
  const { employees } = useEmployees();
  //...
};

to call the useEmployees hook in the Comp component to get the employees from the store.

Conclusion

To access store state in React Redux and JavaScript, we can use the useSelector hook.

Categories
JavaScript Answers

How to move all HTML element children to another parent using JavaScript?

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Sometimes, we want to move all HTML element children to another parent using JavaScript.

In this article, we’ll look at how to move all HTML element children to another parent using JavaScript.

How to move all HTML element children to another parent using JavaScript?

To move all HTML element children to another parent using JavaScript, we can use the appendChild method.

For instance, we write

const setParent = (el, newParent) => {
  newParent.appendChild(el);
};

const l = document.getElementById("old-parent").childNodes.length;
const a = document.getElementById("old-parent");
const b = document.getElementById("new-parent");
for (let i = l; i >= 0; i--) {
  setParent(a.childNodes[i], b);
}

to define the setParent function to new el as a child of newParent.

Then we select the old parent and assign it to a and select the new parent and assign it to b.

Next we use a for loop to loop through a‘s childNodes and move them to b with setParent.

We loop through the childNodes backward so that the order of the child nodes left in a won’t be affected by the loop.

Conclusion

To move all HTML element children to another parent using JavaScript, we can use the appendChild method.

Categories
JavaScript Answers

How to get width and height of SVG element with JavaScript?

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Sometimes, we want to get width and height of SVG element with JavaScript.

In this article, we’ll look at how to get width and height of SVG element with JavaScript.

How to get width and height of SVG element with JavaScript?

To get width and height of SVG element with JavaScript, we can use the getBoundingClientRect method.

For instance, we write

const el = document.getElementById("yourElement");
const rect = el.getBoundingClientRect();

console.log(rect.width);
console.log(rect.height);

to call getElementById to get the element.

Then we call getBoundingClientRect to return an object with the width and height of the element.

Conclusion

To get width and height of SVG element with JavaScript, we can use the getBoundingClientRect method.