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is-png - npm Package Compare versions
Comparing version 1.1.0 to 2.0.0
23
index.js
| 'use strict'; | ||
| module.exports = function (buf) { | ||
| if (!buf || buf.length < 8) { | ||
| module.exports = buffer => { | ||
| if (!buffer || buffer.length < 8) { | ||
| return false; | ||
| } | ||
| return buf[0] === 137 && | ||
| buf[1] === 80 && | ||
| buf[2] === 78 && | ||
| buf[3] === 71 && | ||
| buf[4] === 13 && | ||
| buf[5] === 10 && | ||
| buf[6] === 26 && | ||
| buf[7] === 10; | ||
| return ( | ||
| buffer[0] === 0x89 && | ||
| buffer[1] === 0x50 && | ||
| buffer[2] === 0x4E && | ||
| buffer[3] === 0x47 && | ||
| buffer[4] === 0x0D && | ||
| buffer[5] === 0x0A && | ||
| buffer[6] === 0x1A && | ||
| buffer[7] === 0x0A | ||
| ); | ||
| }; |
| { | ||
| "name": "is-png", | ||
| "version": "1.1.0", | ||
| "description": "Check if a Buffer/Uint8Array is a PNG image", | ||
| "license": "MIT", | ||
| "repository": "sindresorhus/is-png", | ||
| "author": { | ||
| "name": "Sindre Sorhus", | ||
| "email": "sindresorhus@gmail.com", | ||
| "url": "http://sindresorhus.com" | ||
| }, | ||
| "engines": { | ||
| "node": ">=0.10.0" | ||
| }, | ||
| "scripts": { | ||
| "test": "mocha" | ||
| }, | ||
| "files": [ | ||
| "index.js" | ||
| ], | ||
| "keywords": [ | ||
| "png", | ||
| "portable", | ||
| "network", | ||
| "graphics", | ||
| "image", | ||
| "img", | ||
| "pic", | ||
| "picture", | ||
| "photo", | ||
| "type", | ||
| "detect", | ||
| "check", | ||
| "is", | ||
| "exif", | ||
| "binary", | ||
| "buffer", | ||
| "uint8array" | ||
| ], | ||
| "devDependencies": { | ||
| "mocha": "*", | ||
| "read-chunk": "^1.0.0" | ||
| } | ||
| "name": "is-png", | ||
| "version": "2.0.0", | ||
| "description": "Check if a Buffer/Uint8Array is a PNG image", | ||
| "license": "MIT", | ||
| "repository": "sindresorhus/is-png", | ||
| "author": { | ||
| "name": "Sindre Sorhus", | ||
| "email": "sindresorhus@gmail.com", | ||
| "url": "sindresorhus.com" | ||
| }, | ||
| "engines": { | ||
| "node": ">=8" | ||
| }, | ||
| "scripts": { | ||
| "test": "xo && ava && tsd" | ||
| }, | ||
| "files": [ | ||
| "index.js", | ||
| "index.d.ts" | ||
| ], | ||
| "keywords": [ | ||
| "png", | ||
| "portable", | ||
| "network", | ||
| "graphics", | ||
| "image", | ||
| "picture", | ||
| "photo", | ||
| "type", | ||
| "detect", | ||
| "check", | ||
| "is", | ||
| "exif", | ||
| "binary", | ||
| "buffer", | ||
| "uint8array" | ||
| ], | ||
| "devDependencies": { | ||
| "@types/node": "^11.13.5", | ||
| "ava": "^1.4.1", | ||
| "read-chunk": "^3.2.0", | ||
| "tsd": "^0.7.2", | ||
| "xo": "^0.24.0" | ||
| } | ||
| } |
| # is-png [](https://travis-ci.org/sindresorhus/is-png) | ||
| > Check if a Buffer/Uint8Array is a [PNG](http://en.wikipedia.org/wiki/Portable_Network_Graphics) image | ||
| > Check if a Buffer/Uint8Array is a [PNG](https://en.wikipedia.org/wiki/Portable_Network_Graphics) image | ||
| Used by [image-type](https://github.com/sindresorhus/image-type). | ||
| ## Install | ||
| ```sh | ||
| $ npm install --save is-png | ||
| ``` | ||
| $ npm install is-png | ||
| ``` | ||
@@ -20,5 +18,5 @@ | ||
| ```js | ||
| var readChunk = require('read-chunk'); // npm install read-chunk | ||
| var isPng = require('is-png'); | ||
| var buffer = readChunk.sync('unicorn.png', 0, 8); | ||
| const readChunk = require('read-chunk'); // npm install read-chunk | ||
| const isPng = require('is-png'); | ||
| const buffer = readChunk.sync('unicorn.png', 0, 8); | ||
@@ -32,12 +30,9 @@ isPng(buffer); | ||
| ```js | ||
| var xhr = new XMLHttpRequest(); | ||
| xhr.open('GET', 'unicorn.png'); | ||
| xhr.responseType = 'arraybuffer'; | ||
| (async () => { | ||
| const response = await fetch('unicorn.png'); | ||
| const buffer = await response.arrayBuffer(); | ||
| xhr.onload = function () { | ||
| isPng(new Uint8Array(this.response)); | ||
| isPng(new Uint8Array(buffer)); | ||
| //=> true | ||
| }; | ||
| xhr.send(); | ||
| })(); | ||
| ``` | ||
@@ -50,9 +45,16 @@ | ||
| Accepts a Buffer (Node.js) or Uint8Array. | ||
| Accepts a Buffer (Node.js) or Uint8Array. Returns a `boolean` of whether `buffer` is a PNG image. | ||
| It only needs the first 8 bytes. | ||
| #### buffer | ||
| The buffer to check. It only needs the first 8 bytes. | ||
| ## Related | ||
| - [file-type](https://github.com/sindresorhus/file-type) - Detect the file type of a Buffer/Uint8Array/ArrayBuffer | ||
| ## License | ||
| MIT © [Sindre Sorhus](http://sindresorhus.com) | ||
| MIT © [Sindre Sorhus](https://sindresorhus.com) |
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Improved metrics
- Total package byte prevSize
- increased by27.78%
3905
- Number of package files
- increased by25%
5
- Lines of code
- increased by185.71%
40
- Number of lines in readme file
- increased by3.57%
58
Worsened metrics
- Dev dependency count
- increased by150%
5
No dependency changes