Update hashBrowser

This commit is contained in:
Isabelle Viktoria Maciohsek
2020-10-19 22:04:17 +03:00
parent 861db8ddaf
commit 84709a2f44

View File

@ -1,11 +1,16 @@
--- ---
title: hashBrowser title: hashBrowser
tags: browser,advanced,promise,advanced tags: browser,promise,advanced
--- ---
Creates a hash for a value using the [SHA-256](https://en.wikipedia.org/wiki/SHA-2) algorithm. Returns a promise. Creates a hash for a value using the [SHA-256](https://en.wikipedia.org/wiki/SHA-2) algorithm.
Returns a promise.
- Use the [SubtleCrypto](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto) API to create a hash for the given value. - Use the [SubtleCrypto](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto) API to create a hash for the given value.
- Create a new `TextEncoder` and use it to encode `val`, passing its value to `SubtleCrypto.digest()` to generate a digest of the given data.
- Use `DataView.prototype.getUint32()` to read data from the resolved `ArrayBuffer`.
- Add the data to an array using `Array.prototype.push()` after converting it to its hexadecimal representation using `Number.toString(16)`.
- Finally, use `Array.prototype.join()` to combine values in the array of `hexes` into a string.
```js ```js
const hashBrowser = val => const hashBrowser = val =>
@ -19,5 +24,8 @@ const hashBrowser = val =>
``` ```
```js ```js
hashBrowser(JSON.stringify({ a: 'a', b: [1, 2, 3, 4], foo: { c: 'bar' } })).then(console.log); // '04aa106279f5977f59f9067fa9712afc4aedc6f5862a8defc34552d8c7206393' hashBrowser(
JSON.stringify({ a: 'a', b: [1, 2, 3, 4], foo: { c: 'bar' } })
).then(console.log);
// '04aa106279f5977f59f9067fa9712afc4aedc6f5862a8defc34552d8c7206393'
``` ```