Category: JavaScript Answers

Sometimes, we want to fix blurry text in the HTML5 canvas with JavaScript.

In this article, we’ll look at how to fix blurry text in the HTML5 canvas with JavaScript.

How to fix blurry text in the HTML5 canvas with JavaScript?

To fix blurry text in the HTML5 canvas with JavaScript, we set the width and height of the canvas.

For instance, we write

canvas.width = 1000;
canvas.height = 500;
canvas.style.width = width;
canvas.style.height = height;

to set the canvas width and height to a large number with

canvas.width = 1000;
canvas.height = 500;

to increase its resolution to make it less blurry.

Then we set the actual width and height of the canvas with

canvas.style.width = width;
canvas.style.height = height;

Conclusion

To fix blurry text in the HTML5 canvas with JavaScript, we set the width and height of the canvas.

Sometimes, we want to programmatically open new pages on tabs with JavaScript.

In this article, we’ll look at how to programmatically open new pages on tabs with JavaScript.

How to programmatically open new pages on tabs with JavaScript?

To programmatically open new pages on tabs with JavaScript, we call the window.open method with '_newtab'.

For instance, we write

window.open("page.html", "_newtab");

to open page.html with window.open.

We open the page in a new tab by calling it with '_newtab' as the 2nd argument.

Conclusion

To programmatically open new pages on tabs with JavaScript, we call the window.open method with '_newtab'.

Sometimes, we want to use dynamic function name in JavaScript.

In this article, we’ll look at how to use dynamic function name in JavaScript.

How to use dynamic function name in JavaScript?

To use dynamic function name in JavaScript, we can create an object with the function name.

For instance, we write

const name = "myFn";
const fn = { [name]() {} }[name];

to set the fn variable to a function with the name name.

We put the name method in the object and then we get the method with [name].

Conclusion

To use dynamic function name in JavaScript, we can create an object with the function name.

Sometimes, we want to use JavaScript async/await with streams.

In this article, we’ll look at how to use JavaScript async/await with streams.

How to use JavaScript async/await with streams?

To use JavaScript async/await with streams, we can use the stream/promises module.

For instance, we write

const { pipeline } = require("stream/promises");

const run = async () => {
  await pipeline(
    fs.createReadStream("archive.tar"),
    zlib.createGzip(),
    fs.createWriteStream("archive.tar.gz")
  );
  console.log("Pipeline succeeded.");
};

run().catch(console.error);

to define the run function that calls pipeline with the streams inside.

We call createReadStream to create a read stream for the archive.tar file.

Then we call createGzip to create a gzip file.

And then we call createWriteStream to write the gzipped archive.tar file to archive.tar.gz.

We can use the stream/promises module since Node 15.

Conclusion

To use JavaScript async/await with streams, we can use the stream/promises module.

Sometimes, we want to remove spaces with JavaScript regular expression.

In this article, we’ll look at how to remove spaces with JavaScript regular expression.

How to remove spaces with JavaScript regular expression?

To remove spaces with JavaScript regular expression, we can use the string replace method.

For instance, we write

const str = "foo is bar".replace(/ /g, "");

to call "foo is bar".replace with the / /g regex to match all spaces and replace them all with empty strings.

The g flag will make replace replace all matches of the regex.

Conclusion

To remove spaces with JavaScript regular expression, we can use the string replace method.