CODEWITHSUNDEEP
javascriptnode.jsbuffer
Fermuch
Fermuch

Reputation: 477

Convert nodejs' Buffer to browsers' javascript

I'm converting my code from Node.js to browsers' javascript, but I have a problem with the Buffers in node.js. How can I use them in Javascript?

Here's an example:

new Buffer("foo", encoding='utf8')
<Buffer 66 6f 6f>

I need to transform [66, 6f, 6f] in javascript to "foo" and vice-versa. How can I do that? NOTE: this must be done without Node.js.

Upvotes: 36

Views: 61354

Answers (4)

eclat_soft
eclat_soft

Reputation: 810

So I discovered a library I use for web3 included Buffer as a function You can include as CDN:

<script src="https://cdn.jsdelivr.net/gh/ethereumjs/browser-builds/dist/ethereumjs-tx/ethereumjs-tx-1.3.3.min.js"></script>

Then you can use the function as this:

ethereumjs.Buffer.Buffer.from(valueToConvert,'hex');

Upvotes: 11

michaelhanson
michaelhanson

Reputation: 369

There is no direct support for Buffer in browser-based JavaScript, and I am not aware of any compatibility library that implements the Buffer API (yet).

The equivalent functionality in the browser is provided by TypedArrays. You can learn about them here:

When porting a Node Buffer-based implementation to browser-based JavaScript, I found these answers helpful:

Upvotes: 13

Martin Heidegger
Martin Heidegger

Reputation: 920

With https://github.com/substack/node-browserify you can work with buffers in the Browser by using: https://github.com/toots/buffer-browserify. However: this can be very slow in the browser: For faster access use https://github.com/chrisdickinson/bops

Upvotes: 16

Glenjamin
Glenjamin

Reputation: 7340

To convert back to the string, use the buffer's toString method with a supplied encoding.

http://nodejs.org/docs/latest/api/buffers.html#buffer.toString

var buffer = new Buffer("foo", "utf8");
var str = buffer.toString("utf8");
str === "foo";

Upvotes: -8

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