Category: JavaScript Answers

To fix moment.js isValid function not working properly with JavaScript, we can enable strict validation.

For instance, we write

const isValid = moment("It is 2022-05-25", "YYYY-MM-DD").isValid();
const isValid2 = moment("It is 2022-05-25", "YYYY-MM-DD", true).isValid();

to call moment with true as the 3rd argument so that isValid will make sure the date string in the first argument of moment exactly follows the format specified in the string in the 2nd argument.

Therefore, isValid is true, but isValid2 is false since the date string doesn’t exactly follow the YYYY-MM-DD format.

Sometimes, we want to pause setInterval() functions with JavaScript.

In this article, we’ll look at how to pause setInterval() functions with JavaScript.

How to pause setInterval() functions with JavaScript?

To pause setInterval() functions with JavaScript, we call the clearInterval function.

For instance, we write

let doThis = null;

const y = () => {
  //...
};

doThis = setInterval(y, 1000);

const yStart = () => {
  doThis = setInterval(y, 1000);
};

const yStop = () => {
  clearInterval(doThis);
};

to define the yStart function.

In it, we call setInterval with y and 1000 to call y every second.

We assign the returned timer ID to the doThis variable.

Then we define the yStop function that calls clearInterval with doThis to stop the timer.

Conclusion

To pause setInterval() functions with JavaScript, we call the clearInterval function.

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

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

How to remove hyphens from a string with JavaScript?

To remove hyphens from a string with JavaScript, we can use the string replace method.

For instance, we write

const str = "185-51-671";
const newStr = str.replace(/-/g, "");

to call str.replace with /-/g and an empty string to find all hyphens in str and replace them with empty strings.

The new string is returned.

Conclusion

To remove hyphens from a string with JavaScript, we can use the string replace method.

Sometimes, we want to fix Lodash debounce not working in anonymous function with JavaScript.

In this article, we’ll look at how to fix Lodash debounce not working in anonymous function with JavaScript.

How to fix Lodash debounce not working in anonymous function with JavaScript?

To fix Lodash debounce not working in anonymous function with JavaScript, we call the function that debounce returns.

For instance, we write

_.debounce(debounceIt, 500, false)();

to call debounce with the debounceIt and the debounce interval to return a debounced function.

Then we call it immediately with () at the end.

Conclusion

To fix Lodash debounce not working in anonymous function with JavaScript, we call the function that debounce returns.

Sometimes, we want to join an array by a comma and a space with JavaScript.

In this article, we’ll look at how to join an array by a comma and a space with JavaScript.

How to join an array by a comma and a space with JavaScript?

To join an array by a comma and a space with JavaScript, we can use the array join method.

For instance, we write

const myArray = [
  "css",
  "html",
  "xhtml",
  "html5",
  "css3",
  "javascript",
  "jquery",
  "lesscss",
  "arrays",
  "wordpress",
  "facebook",
  "fbml",
  "table",
  ".htaccess",
  "php",
  "c",
  ".net",
  "c#",
  "java",
];
const myString = myArray.join(", ");

to call myArray.join with ', ' to combine each element in myArray into a string separated by a comma and a space.

The combined string is returned.

Conclusion

To join an array by a comma and a space with JavaScript, we can use the array join method.