Category: JavaScript Answers

Sometimes, we want to find the maximum scroll position of a page with JavaScript.

In this article, we’ll look at how to find the maximum scroll position of a page with JavaScript.

How to find the maximum scroll position of a page with JavaScript?

To find the maximum scroll position of a page with JavaScript, we can find the max value between document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, and document.documentElement.offsetHeight.

For instance, we write:

const limit = Math.max(
  document.body.scrollHeight,
  document.body.offsetHeight,
  document.documentElement.clientHeight,
  document.documentElement.scrollHeight,
  document.documentElement.offsetHeight
);
console.log(limit)

to call Math.max with the listed values to find the max scroll position of the page.

Conclusion

To find the maximum scroll position of a page with JavaScript, we can find the max value between document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, and document.documentElement.offsetHeight.

Sometimes, we want to update a JavaScript object with the equivalent of Python’s dict.update() in JavaScript.

In this article, we’ll look at how to update a JavaScript object with the equivalent of Python’s dict.update() in JavaScript.

What is the equivalent of Python’s dict.update() in JavaScript?

To update a JavaScript object with the equivalent of Python’s dict.update() in JavaScript, we can use the spread operator.

For instance, we write:

const marks = {
  'Physics': 67,
  'Maths': 87
}
const internalMarks = {
  'Practical': 48
}
const newMarks = {
  ...marks,
  ...internalMarks
}
console.log(newMarks)

to merge the marks and internalMarks object into the newMarks object with the spread operator.

As a result, newMarks is {Physics: 67, Maths: 87, Practical: 48}.

Conclusion

To update a JavaScript object with the equivalent of Python’s dict.update() in JavaScript, we can use the spread operator.

Sometimes, we want to join two strings with a comma and space between them with JavaScript.

In this article, we’ll look at how to join two strings with a comma and space between them with JavaScript.

How to join two strings with a comma and space between them with JavaScript?

To join two strings with a comma and space between them with JavaScript, we can use the array’s join method.

For instance, we write:

const strings = ["a", "b", "c"];
console.log(strings.join(", "));

to join the strings in strings with a comma and a space.

Therefore, the console log logs 'a, b, c'.

Conclusion

To join two strings with a comma and space between them with JavaScript, we can use the array’s join method.

Sometimes, we want to convert hours and minutes to minutes with moment.js.

In this article, we’ll look at how to convert hours and minutes to minutes with moment.js.

How to convert hours and minutes to minutes with moment.js?

To convert hours and minutes to minutes with moment.js, we can use the duration and asMinutes methods.

For instance, we write:

const m = moment.duration(moment('10:10:10', 'HH:mm:ss').format("HH:mm")).asMinutes()
console.log(m)

We call moment.duration with a moment object formatted in HH:mm format to get the duration object.

Then we convert the duration to an object with the asMinutes methods.

Therefore, we get 610 as a the value of m.

Conclusion

To convert hours and minutes to minutes with moment.js, we can use the duration and asMinutes methods.