🚀 v1.0.0

.editorconfig

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+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 2

.gitignore

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+node_modules
+.nyc_output
+coverage

.npmignore

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+test
+.editorconfig
+.travis.yml
+coverage
+.nyc_output
+node_modules

.travis.yml

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+language: node_js
+sudo: false
+node_js:
+  - 6
+after_script:
+  - npm run coveralls

lib/index.js

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+const padLeft = require('left-pad')
+
+module.exports = (input, line, col = -1) => {
+  let code, start, error
+
+  // split input by linebreaks
+  code = input.split('\n')
+
+  // find line in input (count new lines)
+  start = code[line - 2] // line before error
+  error = code[line - 1] // line containing error
+
+  // A little ugly, but we can handle line zero this way
+  let frame = []
+  if (line - 1 === 0) frame.push('   0. |')
+  else frame.push(`   ${line - 1}. | ${start}`)
+  frame.push(` > ${line}. | ${error}`)
+  if (col !== -1) frame.push(`      | ${padLeft('^', col + 1, ' ')}`)
+  frame.push(`   ${line + 1}. |`)
+
+  return frame.join('\n')
+}

license.md

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+MIT License
+
+Copyright (c) 2016 Henry Snopek
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

package.json

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+{
+  "name": "code-frame",
+  "version": "1.0.0",
+  "description": "Got an error, give me the src/line/col and I'll frame it for you.",
+  "main": "lib/index.js",
+  "scripts": {
+    "test": "npm run lint && nyc ava",
+    "lint": "standard | snazzy",
+    "coverage": "npm test && nyc report --reporter=html && open ./coverage/index.html",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls"
+  },
+  "ava": {
+    "verbose": "true"
+  },
+  "engines": {
+    "node": ">= 6.0.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://[email protected]/hhsnopek/code-frame.git"
+  },
+  "author": "Henry Snopek <[email protected]> (http://hhsnopek.com/)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/hhsnopek/code-frame/issues"
+  },
+  "homepage": "https://github.com/hhsnopek/code-frame#readme",
+  "devDependencies": {
+    "ava": "^0.16.0",
+    "coveralls": "^2.11.12",
+    "nyc": "^8.1.0",
+    "snazzy": "^4.0.1",
+    "standard": "^7.1.2"
+  },
+  "dependencies": {
+    "left-pad": "^1.1.1"
+  }
+}

readme.md

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+# Code Frame
+[![Travis]]()
+[![Coveralls]]()
+[![NPM]]()
+[![L]][MIT]
+
+Minimal Code Frame like babel-code-frame, but smaller
+
+## Usage
+
+```javascript
+const framer = require('code-frame')
+
+// framer(input, line[, col])
+// input - string
+// line  - int
+// col   - int (optional)
+
+framer('\nfunction (foo)\n{\tconsole.log(foo\n}', 2, 15)
+//   1. |
+// > 2. | function (foo)
+//      |                ^
+//   3. |
+
+// Without col
+framer('\n\n\tconsole.logfoo, bar)', 3)
+//   2. |
+// > 3. |   console.logfoo, bar)
+//   4. |
+```
+
+## Development
+requirements:
+- node: 6.0  >=
+
+cmds: `npm test`
+
+[Travis]: //img.shields.io/travis/hhsnopek/code-frame.svg?maxAge=2592000?style=flat-square
+[Coveralls]: //img.shields.io/coveralls/hhsnopek/code-frame.svg?maxAge=2592000?style=flat-square
+[NPM]: //img.shields.io/npm/hhsnopek/code-frame.svg?maxAge=2592000?style=flat-square
+[L]: //img.shields.io/npm/l/code-frame.svg?maxAge=2592000
+[MIT]: license.md

test/index.js

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+const test = require('ava')
+const framer = require('..')
+
+test('basic output', (t) => {
+  let error = framer('\nfunction (foo)\n{\tconsole.log(foo\n}', 2, 15)
+  let expected =
+    '   1. | \n > 2. | function (foo)\n      |                ^\n   3. |'
+  t.is(error, expected)
+})
+
+test('error at line 1', (t) => {
+  let error = framer('function (foo, bar\n{\tconsole.log(foo, bar)\n}', 1, 17)
+  let expected =
+    '   0. |\n > 1. | function (foo, bar\n      |                  ^\n   2. |'
+  t.is(error, expected)
+})
+
+test('no col passed', (t) => {
+  let error = framer('\n\n\tconsole.logfoo, bar)', 3)
+  let expected =
+    '   2. | \n > 3. | \tconsole.logfoo, bar)\n   4. |'
+  t.is(error, expected)
+})