We can use the Blob constructor to get the size of a string in bytes.
For instance, we can write:
const {
size
} = new Blob(["hello"]);
console.log(size)
We create a blob from a string with the Blob constructor.
Then we get the size property of the blob to get the size.
We should see that size is 5 from the console log.
Get a JavaScript String’s Length in Bytes with TextEncoder
We can also use the TextEncoder constructor to get the size of a string in bytes.
For example, we can write:
const size = (new TextEncoder().encode('hello')).length
console.log(size)
We create a new TextEncoder instance and call encode on it with the string we want to get the size from.
And we should get the same result as the previous example.
