Category: JavaScript

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Vue Answers

How to scroll to bottom of div with Vue.js?

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Sometimes, we want to scroll to bottom of div with Vue.js.

In this article, we’ll look at how to scroll to bottom of div with Vue.js.

How to scroll to bottom of div with Vue.js?

To scroll to bottom of div with Vue.js, we assign a ref to the element we want to scroll to and call scrollIntoView on the ref.

For instance, we write

<template>
  <div>
    <button @click="scrollToElement">scroll to me</button>

    <div ref="scrollToMe">
      <!-- content -->
    </div>
  </div>
</template>

<script>
export default {
  //...
  methods: {
    scrollToElement() {
      const el = this.$refs.scrollToMe;

      if (el) {
        el.scrollIntoView({ behavior: "smooth" });
      }
    },
  },
  //...
};
</script>

to define the scrollToElement method that gets the div with the scrollToMe ref.

Then we call el.scrollIntoView if el isn’t null.

We call it with { behavior: "smooth" } to make the scrolling smooth.

And we set the click handler of the button to scrollToElement to do the scrolling on click.

Conclusion

To scroll to bottom of div with Vue.js, we assign a ref to the element we want to scroll to and call scrollIntoView on the ref.

Categories
JavaScript Answers

How to use JavaScript scrollIntoView to do smooth scroll with offset?

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To use JavaScript scrollIntoView to do smooth scroll with offset, we can call scrollTo with an object that has the top and behavior properties.

For instance, we write

const element = document.getElementById("targetElement");
const headerOffset = 45;
const elementPosition = element.getBoundingClientRect().top;
const offsetPosition = elementPosition + window.pageYOffset - headerOffset;

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

to call scrollTo with an object to set the top property to the top offset position.

And we set behavior to 'smooth' to do smooth scrolling.

We get offsetPosition by getting the computed top position of the element with getBoundingClientRect and add window.pageYOffset - headerOffset to it.

Conclusion

To use JavaScript scrollIntoView to do smooth scroll with offset, we can call scrollTo with an object that has the top and behavior properties.

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JavaScript Answers

How to use JavaScript regex to split by line?

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Sometimes, we want to use JavaScript regex to split by line.

In this article, we’ll look at how to use JavaScript regex to split by line.

How to use JavaScript regex to split by line?

To use JavaScript regex to split by line, we can call the string split method with a regex.

For instance, we write

const result = subject.split(/\r?\n/);

to call subject.split with a regex that matches \r\n or \n and return an array with the substrings between the new line characters.

Conclusion

To use JavaScript regex to split by line, we can call the string split method with a regex.

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JavaScript Answers

How to reverse an array in JavaScript without using libraries?

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Sometimes, we want to reverse an array in JavaScript without using libraries.

In this article, we’ll look at how to reverse an array in JavaScript without using libraries.

How to reverse an array in JavaScript without using libraries?

To reverse an array in JavaScript without using libraries, we use the array reverse method.

For instance, we write

const a = [3, 5, 7, 8];
const reversed = a.reverse();

to call a.reverse to return a new array with the elements in a reversed.

Conclusion

To reverse an array in JavaScript without using libraries, we use the array reverse method.

Categories
JavaScript Answers

How to call static method within a class with JavaScript?

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Sometimes, we want to call static method within a class with JavaScript.

In this article, we’ll look at how to call static method within a class with JavaScript.

How to call static method within a class with JavaScript?

To call static method within a class with JavaScript, we call the static method with the class.

For instance, we write

class MyClass {
  myNonStaticMethod() {
    console.log("I'm not static.");
    MyClass.myStaticMethod();
  }

  static myStaticMethod() {
    console.log("hey, I'm static!");
  }
}

to call myStaticMethod with MyClass.myStaticMethod() in the myNonStaticMethod method.

Conclusion

To call static method within a class with JavaScript, we call the static method with the class.