Category: JavaScript

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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.

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Vue Answers

How to fix Vue.js unknown custom element error with JavaScript?

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Sometimes, we want to fix Vue.js unknown custom element error with JavaScript.

In this article, we’ll look at how to fix Vue.js unknown custom element error with JavaScript.

How to fix Vue.js unknown custom element error with JavaScript?

To fix Vue.js unknown custom element error with JavaScript, we register our component before we use it.

To register it globally, we call Vue.component like

Vue.component("my-task", {
  // ...
});

new Vue({
  // ...
});

We create a register the my-task component with Vue.component.

To register a component locally, we write

export default {
  data() {
    return {};
  },
  components: {
    "my-task": MyTask,
  },
};

to register the my-task component in another component.

We set the my-task tag to render the MyTask component.

Conclusion

To fix Vue.js unknown custom element error with JavaScript, we register our component before we use it.

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JavaScript Answers

How to use scrollIntoView with a fixed position header with JavaScript?

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Sometimes, we want to use scrollIntoView with a fixed position header with JavaScript.

In this article, we’ll look at how to use scrollIntoView with a fixed position header with JavaScript.

How to use scrollIntoView with a fixed position header with JavaScript?

To use scrollIntoView with a fixed position header with JavaScript, we can call scroll to scroll to the element at the given position.

For instance, we write

const node = document.getElementById("foo");
const yourHeight = 200;

node.scrollIntoView(true);

const scrolledY = window.scrollY;

if (scrolledY) {
  window.scroll(0, scrolledY - yourHeight);
}

to select the element we want to scroll to with getElementById.

Then we call node.scrollIntoView to scroll to the element.

Next, we call window.scrollto to scroll to scrolledY - yourHeight to scroll to the given position.

Conclusion

To use scrollIntoView with a fixed position header with JavaScript, we can call scroll to scroll to the element at the given position.

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JavaScript Answers

How to test the type of a DOM element in JavaScript?

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Sometimes, we want to test the type of a DOM element in JavaScript.

In this article, we’ll look at how to test the type of a DOM element in JavaScript.

How to test the type of a DOM element in JavaScript?

To test the type of a DOM element in JavaScript, we can check the nodeName property of the element.

For instance, we write

if (element.nodeName === "A") {
  //...
} else if (element.nodeName === "TD") {
  //...
}

to check if element is an a element with

element.nodeName === "A"

And we check if element is a td element with

element.nodeName === "TD"

Conclusion

To test the type of a DOM element in JavaScript, we can check the nodeName property of the element.

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TypeScript Answers

How to iterate over array of objects in TypeScript?

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Sometimes, we want to iterate over array of objects in TypeScript.

In this article, we’ll look at how to iterate over array of objects in TypeScript.

How to iterate over array of objects in TypeScript?

To iterate over array of objects in TypeScript, we can use a for-of loop.

For instance, we write

for (const product of products) {
  console.log(product.productDesc);
}

to loop through the products array with a for-of loop.

In it, we log the productDesc property of the products object entry being looped through, which is stored in product.

Conclusion

To iterate over array of objects in TypeScript, we can use a for-of loop.