Use ES6 & add 'use strict'

RyanZim · RyanZim · commit 47f22cc0cbb4 · 2017-02-22T11:08:57.000-05:00
diff --git a/index.js b/index.js
@@ -1,6 +1,7 @@
+'use strict'
 /* global fetch */
 
-var baseUrl = 'https://www.cryptocompare.com/api/data/'
+const baseUrl = 'https://www.cryptocompare.com/api/data/'
 
 function fetchJSON (url) {
   return fetch(url)
@@ -13,22 +14,20 @@ function fetchJSON (url) {
 }
 
 function coinList () {
-  var url = baseUrl + 'coinlist/'
+  let url = `${baseUrl}coinlist/`
   return fetchJSON(url)
 }
 
 function price (fsym, tsyms, useBtc) {
-  if (!Array.isArray(tsyms)) tsyms = [tsyms]
-  var url = baseUrl + 'price?fsym=' + fsym + '&tsyms=' + tsyms.join(',')
+  let url = `${baseUrl}price?fsym=${fsym}&tsyms=${tsyms}`
   if (useBtc) url += 'usebtc=true'
   return fetchJSON(url)
 }
 
 function priceHistorical (fsym, tsyms, time) {
-  if (!Array.isArray(tsyms)) tsyms = [tsyms]
   if (!(time instanceof Date)) throw new Error('time parameter must be an instance of Date.')
   time = Math.floor(time.getTime() / 1000)
-  var url = baseUrl + 'pricehistorical?fsym=' + fsym + '&tsyms=' + tsyms.join(',') + '&ts=' + time
+  let url = `${baseUrl}pricehistorical?fsym=${fsym}&tsyms=${tsyms}&ts=${time}`
   return fetchJSON(url)
 }
 
diff --git a/test/cryptocompare.test.js b/test/cryptocompare.test.js
@@ -1,17 +1,18 @@
-var test = require('tape')
+'use strict'
+const test = require('tape')
 
 // set to global
 global.fetch = require('node-fetch')
-var cc = require('../')
+const cc = require('../')
 
-test('coinList()', function (t) {
+test('coinList()', t => {
   t.plan(1)
   cc.coinList().then(coinList => {
     t.strictEqual(coinList.BTC.CoinName, 'Bitcoin', 'CoinName field should be Bitcoin')
   }).catch(t.end)
 })
 
-test('price()', function (t) {
+test('price()', t => {
   t.plan(4)
   cc.price('BTC', ['USD', 'CNY']).then(prices => {
     t.strictEqual(prices[0].Symbol, 'USD', 'prices[0].Symbol === USD')
@@ -22,10 +23,10 @@ test('price()', function (t) {
   }).catch(t.end)
 })
 
-test('priceHistorical()', function (t) {
+test('priceHistorical()', t => {
   t.plan(5)
   // Arbitrary timestamp; historical values are hard-coded into this test
-  var timestamp = new Date(1456149600 * 1000)
+  const timestamp = new Date(1456149600 * 1000)
   cc.priceHistorical('BTC', ['USD', 'CNY'], timestamp).then(prices => {
     t.strictEqual(prices[0].Symbol, 'USD', 'prices[0].Symbol === USD')
     t.strictEqual(typeof prices[0].Price, 'number', 'prices[0].Price is a number')
