Category: JavaScript Answers

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

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

How to remove leading comma from a string with JavaScript?

To remove leading comma from a string with JavaScript, we call string substring with 1.

For instance, we write

const myOriginalString = ",'first string','more','even more'";
const myString = myOriginalString.substring(1);

to call myOriginalString.substring with 1 to return a new string that’s the same as myOriginalString except that the first character is removed.

Conclusion

To remove leading comma from a string with JavaScript, we call string substring with 1.

Sometimes, we want to make a button redirect one page to another page with JavaScript.

In this article, we’ll look at how to make a button redirect one page to another page with JavaScript.

How to make a button redirect one page to another page with JavaScript?

To make a button redirect one page to another page with JavaScript, we can set location.href to the destination URL on click.

For instance, we write

<button id="myButton">Home</button>

to add a button.

Then we write

document.getElementById("myButton").onclick = () => {
  location.href = "www.yoursite.com";
};

to select the button with getElementById.

And then we set its onclick property to a function that sets location.href to the destination URL to go to the URL when we click the button.

Conclusion

To make a button redirect one page to another page with JavaScript, we can set location.href to the destination URL on click.

Sometimes, we want to do multi-column sortBy with lodash and JavaScript.

In this article, we’ll look at how to do multi-column sortBy with lodash and JavaScript.

How to do multi-column sortBy with lodash and JavaScript?

To do multi-column sortBy with lodash and JavaScript, we can use the orderBy function.

For instance, we write

const data = _.orderBy(arr, ["type", "name"], ["asc", "desc"]);

to call orderBy with the arr array that we want to sort.

And we call it with 2 arrays that has the property we want to sort by and the direction.

Then the array with the sorted items is returned.

Conclusion

To do multi-column sortBy with lodash and JavaScript, we can use the orderBy function.

Sometimes, we want to use filesystem in Node.js with async and await.

In this article, we’ll look at how to use filesystem in Node.js with async and await.

How to use filesystem in Node.js with async and await?

To use filesystem in Node.js with async and await. we can use the fs.promises module.

For instance, we write

import fs from "fs";
const fsPromises = fs.promises;

const listDir = async () => {
  try {
    return fsPromises.readdir("path/to/dir");
  } catch (err) {
    console.error("Error", err);
  }
};

listDir();

to create the listDir function that calls fsPromises.readdir to get the contents listing of the directory.

We return the promise returned by readdir to return the results in the promise.

Conclusion

To use filesystem in Node.js with async and await. we can use the fs.promises module.

To fix scrollIntoView scrolling too far with JavaScript, we can call scrolTo with the top position of the element.

For instance, we write

const id = "profilePhoto";
const yOffset = -10;
const element = document.getElementById(id);
const y = element.getBoundingClientRect().top + window.pageYOffset + yOffset;

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

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

Then we get the y position by adding the top positionb of the element with the pageYOffset and yOffset.

Finally, we call scrollTo with an object with the top position set to y to scroll to the top of the element.