ES2015ify and require Node.js 4

Author: sindresorhus

.gitattributes

@@ -1 +1,2 @@
 * text=auto
+*.js text eol=lf

.travis.yml

@@ -1,6 +1,4 @@
 language: node_js
 node_js:
-  - '5'
+  - '6'
   - '4'
-  - '0.12'
-  - '0.10'

index.js

@@ -1,19 +1,21 @@
 'use strict';
-var sliceAnsi = require('slice-ansi');
-var stringWidth = require('string-width');
+const sliceAnsi = require('slice-ansi');
+const stringWidth = require('string-width');
 
-module.exports = function (input, columns, options) {
-	options = options || {};
+module.exports = (input, columns, opts) => {
+	opts = Object.assign({
+		position: 'end'
+	}, opts);
 
-	var position = options.position || 'end';
-	var ellipsis = '…';
+	const position = opts.position;
+	const ellipsis = '…';
 
 	if (typeof input !== 'string') {
-		throw new TypeError('Expected `input` to be a string, got ' + typeof input);
+		throw new TypeError(`Expected \`input\` to be a string, got ${typeof input}`);
 	}
 
 	if (typeof columns !== 'number') {
-		throw new TypeError('Expected `columns` to be a number, got ' + typeof columns);
+		throw new TypeError(`Expected \`columns\` to be a number, got ${typeof columns}`);
 	}
 
 	if (columns < 1) {
@@ -24,7 +26,7 @@ module.exports = function (input, columns, options) {
 		return ellipsis;
 	}
 
-	var length = stringWidth(input);
+	const length = stringWidth(input);
 
 	if (length <= columns) {
 		return input;
@@ -33,11 +35,11 @@ module.exports = function (input, columns, options) {
 	if (position === 'start') {
 		return ellipsis + sliceAnsi(input, length - columns + 1, length);
 	} else if (position === 'middle') {
-		var half = Math.floor(columns / 2);
+		const half = Math.floor(columns / 2);
 		return sliceAnsi(input, 0, half) + ellipsis + sliceAnsi(input, length - (columns - half) + 1, length);
 	} else if (position === 'end') {
 		return sliceAnsi(input, 0, columns - 1) + ellipsis;
 	}
 
-	throw new Error('Expected `options.position` to be either `start`, `middle` or `end`, got ' + position);
+	throw new Error(`Expected \`options.position\` to be either \`start\`, \`middle\` or \`end\`, got ${position}`);
 };

package.json

@@ -10,7 +10,7 @@
     "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "scripts": {
     "test": "xo && ava"
@@ -33,7 +33,7 @@
   ],
   "dependencies": {
     "slice-ansi": "0.0.4",
-    "string-width": "^1.0.1"
+    "string-width": "^2.0.0"
   },
   "devDependencies": {
     "ava": "*",

readme.md

@@ -20,7 +20,7 @@ const cliTruncate = require('cli-truncate');
 cliTruncate('unicorn', 4);
 //=> 'uni…'
 
-// truncate at different positions
+// Truncate at different positions
 cliTruncate('unicorn', 4, {position: 'start'});
 //=> '…orn'
 
@@ -30,7 +30,7 @@ cliTruncate('unicorn', 4, {position: 'middle'});
 cliTruncate('\u001b[31municorn\u001b[39m', 4);
 //=> '\u001b[31muni\u001b[39m…'
 
-// truncate the paragraph to the terminal width
+// Truncate the paragraph to the terminal width
 const paragraph = 'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa.';
 cliTruncate(paragraph, process.stdout.columns));
 //=> 'Lorem ipsum dolor sit amet, consectetuer adipiscing…'
@@ -55,6 +55,8 @@ Columns to occupy in the terminal.
 
 #### options
 
+Type: `Object`
+
 ##### position
 
 Type: `string`<br>

test.js

@@ -1,7 +1,7 @@
 import test from 'ava';
 import m from './';
 
-// because of https://github.com/chalk/slice-ansi/issues/6
+// Because of https://github.com/chalk/slice-ansi/issues/6
 const mootEscapes = '\u001b[31m\u001b[31m\u001b[31m\u001b[31m';
 
 test(t => {
@@ -17,8 +17,8 @@ test(t => {
 	t.is(m('\u001b[31municorn\u001b[39m', 1), '…');
 	t.is(m('\u001b[31municorn\u001b[39m', 4), mootEscapes + '\u001b[31muni\u001b[39m…');
 	// TODO
-	t.skip.is(m('a\ud83c\ude00b\ud83c\ude00c', 5), 'a\ud83c\ude00b…', 'surrogate pairs');
-	t.skip.is(m('안녕하세요', 3), '안…', 'wide char');
+	// t.skip.is(m('a\ud83c\ude00b\ud83c\ude00c', 5), 'a\ud83c\ude00b…', 'surrogate pairs');
+	// t.skip.is(m('안녕하세요', 3), '안…', 'wide char');
 	t.is(m('unicorn', 5, {position: 'start'}), '…corn');
 	t.is(m('unicorn', 6, {position: 'start'}), '…icorn');
 	t.is(m('unicorn', 5, {position: 'middle'}), 'un…rn');