Category: JavaScript

Sometimes, we want to fix Yarn global command not working with JavaScript

In this article, we’ll look at how to fix Yarn global command not working with JavaScript.

How to fix Yarn global command not working with JavaScript?

To fix Yarn global command not working with JavaScript, we add the return value of yarn global bin to the PATH environment variable.

To do this, we add

export PATH="$PATH:$(yarn global bin)"

to the ~/.bash_profile file to load the Yarn’s global package folder into the PATH environment variable.

Conclusion

To fix Yarn global command not working with JavaScript, we add the return value of yarn global bin to the PATH environment variable.

Sometimes, we want to execute shell command in JavaScript.

In this article, we’ll look at how to execute shell command in JavaScript.

How to execute shell command in JavaScript?

To execute shell command in JavaScript, we can use child_process module’s execSync function.

For instance, we write

const { execSync } = require("child_process");
const output = execSync("ls", { encoding: "utf-8" });
console.log(output);

to call execSync with 'ls' and an object with the encoding to run the ls command and set the encoding of the output to Unicode.

Then we get the output of the command returned.

Conclusion

To execute shell command in JavaScript, we can use child_process module’s execSync function.

Sometimes, we want to replace all non alphanumeric characters, new lines, and multiple white space with one space with JavaScript.

In this article, we’ll look at how to replace all non alphanumeric characters, new lines, and multiple white space with one space with JavaScript.

How to replace all non alphanumeric characters, new lines, and multiple white space with one space with JavaScript?

To replace all non alphanumeric characters, new lines, and multiple white space with one space with JavaScript, we can use the string replace method with a regex.

For instance, we write

const s = text.replace(/[\W_]+/g, " ");

to call text.replace with a regex that matches all non-word characters and underscores with \W and _ respectively.

The g flag lets us match all instances of the characters.

And then we replace them all with spaces.

Conclusion

To replace all non alphanumeric characters, new lines, and multiple white space with one space with JavaScript, we can use the string replace method with a regex.

Sometimes, we want to add break statement in JavaScript array map method.

In this article, we’ll look at how to add break statement in JavaScript array map method.

How to add break statement in JavaScript array map method?

To add break statement in JavaScript array map method, we can use the array some method.

For instance, we write

const hasValueLessThanTen = myArray.some((val) => {
  return val < 10;
});

to call myArray.some with a callback that checks if any items in myArray has value less than 10.

Conclusion

To add break statement in JavaScript array map method, we can use the array some method.

Sometimes, we want to get local href value from anchor (a) tag with JavaScript.

In this article, we’ll look at how to get local href value from anchor (a) tag with JavaScript.

How to get local href value from anchor (a) tag with JavaScript?

To get local href value from anchor (a) tag with JavaScript, we can use the href property.

For instance, we write

const href = document.getElementById("aaa").href

to get the anchor element with ID 'aaa' with getElementById.

And then we get the href attribute value with href.

Conclusion

To get local href value from anchor (a) tag with JavaScript, we can use the href property.