vega-util - npm Package Compare versions

Comparing version 1.14.1 to 1.15.0

build/vega-util.js

 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
   typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  (global = global || self, factory(global.vega = {}));
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.vega = {}));
 }(this, (function (exports) { 'use strict';
@@ -44,3 +44,3 @@
   function splitAccessPath(p) {
-    var path = [],
+    let path = [],
         q = null,
@@ -116,31 +116,29 @@ b = 0,
 
-  var empty = [];
+  const id = field('id');
 
-  var id = field('id');
+  const identity = accessor(function(_) { return _; }, [], 'identity');
 
-  var identity = accessor(function(_) { return _; }, empty, 'identity');
+  const zero = accessor(function() { return 0; }, [], 'zero');
 
-  var zero = accessor(function() { return 0; }, empty, 'zero');
+  const one = accessor(function() { return 1; }, [], 'one');
 
-  var one = accessor(function() { return 1; }, empty, 'one');
+  const truthy = accessor(function() { return true; }, [], 'true');
 
-  var truthy = accessor(function() { return true; }, empty, 'true');
+  const falsy = accessor(function() { return false; }, [], 'false');
 
-  var falsy = accessor(function() { return false; }, empty, 'false');
-
   function log(method, level, input) {
-    var args = [level].concat([].slice.call(input));
+    const args = [level].concat([].slice.call(input));
     console[method].apply(console, args); // eslint-disable-line no-console
   }
 
-  var None  = 0;
-  var Error$1 = 1;
-  var Warn  = 2;
-  var Info  = 3;
-  var Debug = 4;
+  const None  = 0;
+  const Error$1 = 1;
+  const Warn  = 2;
+  const Info  = 3;
+  const Debug = 4;
 
   function logger(_, method) {
-    var level = _ || None;
+    let level = _ || None;
     return {
-      level: function(_) {
+      level(_) {
         if (arguments.length) {
@@ -153,15 +151,15 @@ level = +_;
       },
-      error: function() {
+      error() {
         if (level >= Error$1) log(method || 'error', 'ERROR', arguments);
         return this;
       },
-      warn: function() {
+      warn() {
         if (level >= Warn) log(method || 'warn', 'WARN', arguments);
         return this;
       },
-      info: function() {
+      info() {
         if (level >= Info) log(method || 'log', 'INFO', arguments);
         return this;
       },
-      debug: function() {
+      debug() {
         if (level >= Debug) log(method || 'log', 'DEBUG', arguments);
@@ -183,3 +181,3 @@ return this;
     return configs.reduce((out, source) => {
-      for (var key in source) {
+      for (const key in source) {
         if (key === 'signals') {
@@ -195,3 +193,3 @@ // for signals, we merge the signals arrays
           // otherwise, no recursion: objects overwrite, no merging
-          var r = key === 'legend' ? {layout: 1}
+          const r = key === 'legend' ? {layout: 1}
             : key === 'style' ? true
@@ -209,3 +207,3 @@ : null;
 
-    var k, o;
+    let k, o;
     if (isObject(value) && !isArray(value)) {
@@ -250,28 +248,21 @@ o = isObject(output[key]) ? output[key] : (output[key] = {});
 
-  function exp(sign) {
-    return function(x) { return sign * Math.exp(x); };
-  }
+  const exp = sign =>
+    x => sign * Math.exp(x);
 
-  function log$1(sign) {
-    return function(x) { return Math.log(sign * x); };
-  }
+  const log$1 = sign =>
+    x => Math.log(sign * x);
 
-  function symlog(c) {
-    return function(x) { return Math.sign(x) * Math.log1p(Math.abs(x / c)); };
-  }
+  const symlog = c =>
+    x => Math.sign(x) * Math.log1p(Math.abs(x / c));
 
-  function symexp(c) {
-    return function(x) { return Math.sign(x) * Math.expm1(Math.abs(x)) * c; };
-  }
+  const symexp = c =>
+    x => Math.sign(x) * Math.expm1(Math.abs(x)) * c;
 
-  function pow(exponent) {
-    return function(x) {
-      return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
-    };
-  }
+  const pow = exponent =>
+    x => x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
 
   function pan(domain, delta, lift, ground) {
-    var d0 = lift(domain[0]),
-        d1 = lift(peek(domain)),
-        dd = (d1 - d0) * delta;
+    const d0 = lift(domain[0]),
+          d1 = lift(peek(domain)),
+          dd = (d1 - d0) * delta;
 
@@ -302,5 +293,5 @@ return [
   function zoom(domain, anchor, scale, lift, ground) {
-    var d0 = lift(domain[0]),
-        d1 = lift(peek(domain)),
-        da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
+    const d0 = lift(domain[0]),
+          d1 = lift(peek(domain)),
+          da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
 
@@ -318,3 +309,3 @@ return [
   function zoomLog(domain, anchor, scale) {
-    var sign = Math.sign(domain[0]);
+    const sign = Math.sign(domain[0]);
     return zoom(domain, anchor, scale, log$1(sign), exp(sign));
@@ -351,3 +342,3 @@ }
   function clampRange(range, min, max) {
-    var lo = range[0],
+    let lo = range[0],
         hi = range[1],
@@ -396,3 +387,3 @@ span;
 
-  const compare$1 = (u, v) => (u < v || u == null) && v != null ? -1
+  const ascending = (u, v) => (u < v || u == null) && v != null ? -1
     : (u > v || v == null) && u != null ? 1
@@ -408,3 +399,3 @@ : ((v = v instanceof Date ? +v : v), (u = u instanceof Date ? +u : u)) !== u && v === v ? -1
   const compare1 = (field, order) => function(a, b) {
-    return compare$1(field(a), field(b)) * order;
+    return ascending(field(a), field(b)) * order;
   };
@@ -418,3 +409,3 @@
         f = fields[i];
-        c = compare$1(f(a), f(b));
+        c = ascending(f(a), f(b));
       }
@@ -426,17 +417,14 @@ return c * orders[i];
   function constant(_) {
-    return isFunction(_) ? _ : function() { return _; };
+    return isFunction(_) ? _ : () => _;
   }
 
   function debounce(delay, handler) {
-    var tid, evt;
+    let tid;
 
-    function callback() {
-      handler(evt);
-      tid = evt = null;
-    }
-
-    return function(e) {
-      evt = e;
+    return e => {
       if (tid) clearTimeout(tid);
-      tid = setTimeout(callback, delay);
+      tid = setTimeout(
+        () => (handler(e), tid = null),
+        delay
+      );
     };
@@ -446,3 +434,3 @@ }
   function extend(_) {
-    for (var x, k, i=1, len=arguments.length; i<len; ++i) {
+    for (let x, k, i=1, len=arguments.length; i<len; ++i) {
       x = arguments[i];
@@ -459,3 +447,3 @@ for (k in x) { _[k] = x[k]; }
   function extent(array, f) {
-    var i = 0, n, v, min, max;
+    let i = 0, n, v, min, max;
 
@@ -498,3 +486,3 @@ if (array && (n = array.length)) {
   function extentIndex(array, f) {
-    var i = -1,
+    let i = -1,
         n = array.length,
@@ -560,6 +548,6 @@ a, b, c, u, v;
 
-  var NULL = {};
+  const NULL = {};
 
   function fastmap(input) {
-    var obj = {},
+    let obj = {},
         map,
@@ -609,3 +597,3 @@ test;
       clean() {
-        var next = {},
+        let next = {},
             size = 0,
@@ -636,3 +624,3 @@ key, value;
 
-    var a = range[0],
+    let a = range[0],
         b = peek(range),
@@ -655,6 +643,6 @@ t = +threshold,
 
-  function inherits(child, parent) {
-    var proto = (child.prototype = Object.create(parent.prototype));
+  function inherits(child, parent, members) {
+    const proto = (child.prototype = Object.create(parent.prototype));
     proto.constructor = child;
-    return proto;
+    return extend(proto, members);
   }
@@ -668,3 +656,3 @@
   function inrange(value, range, left, right) {
-    var r0 = range[0], r1 = range[range.length-1], t;
+    let r0 = range[0], r1 = range[range.length-1], t;
     if (r0 > r1) {
@@ -776,4 +764,4 @@ t = r0;
   function merge(compare, array0, array1, output) {
-    var n0 = array0.length,
-        n1 = array1.length;
+    const n0 = array0.length,
+          n1 = array1.length;
 
@@ -783,3 +771,3 @@ if (!n1) return array0;
 
-    var merged = output || new array0.constructor(n0 + n1),
+    let merged = output || new array0.constructor(n0 + n1),
         i0 = 0, i1 = 0, i = 0;
@@ -805,3 +793,3 @@
   function repeat(str, reps) {
-    var s = '';
+    let s = '';
     while (--reps >= 0) s += str;
@@ -812,5 +800,5 @@ return s;
   function pad(str, length, padchar, align) {
-    var c = padchar || ' ',
-        s = str + '',
-        n = length - s.length;
+    const c = padchar || ' ',
+          s = str + '',
+          n = length - s.length;
 
@@ -844,5 +832,4 @@ return n <= 0 ? s
 
-  function defaultParser(_) {
-    return isNumber(_) ? _ : isDate(_) ? _ : Date.parse(_);
-  }
+  const defaultParser = _ =>
+    isNumber(_) ? _ : isDate(_) ? _ : Date.parse(_);
 
@@ -859,3 +846,5 @@ function toDate(_, parser) {
   function toSet(_) {
-    for (var s={}, i=0, n=_.length; i<n; ++i) s[_[i]] = true;
+    const s = {},
+          n = _.length;
+    for (let i=0; i<n; ++i) s[_[i]] = true;
     return s;
@@ -865,6 +854,6 @@ }
   function truncate(str, length, align, ellipsis) {
-    var e = ellipsis != null ? ellipsis : '\u2026',
-        s = str + '',
-        n = s.length,
-        l = Math.max(0, length - e.length);
+    const e = ellipsis != null ? ellipsis : '\u2026',
+          s = str + '',
+          n = s.length,
+          l = Math.max(0, length - e.length);
 
@@ -880,3 +869,3 @@ return n <= length ? s
       if (filter) {
-        var i = 0, n = array.length, t;
+        let i = 0, n = array.length, t;
         for (; i<n; ++i) {
@@ -900,2 +889,3 @@ if (t = filter(array[i])) visitor(t, i, array);
   exports.array = array;
+  exports.ascending = ascending;
   exports.clampRange = clampRange;
@@ -902,0 +892,0 @@ exports.compare = compare;

build/vega-util.min.js

@@ -1,1 +0,1 @@
-!function(n,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((n=n||self).vega={})}(this,(function(n){"use strict";function t(n,t,r){return n.fields=t||[],n.fname=r,n}function r(n){return null==n?null:n.fields}function e(n){return 1===n.length?u(n[0]):o(n)}const u=n=>function(t){return t[n]},o=n=>{const t=n.length;return function(r){for(let e=0;e<t;++e)r=r[n[e]];return r}};function i(n){throw Error(n)}function c(n){var t,r,e,u=[],o=null,c=0,f=n.length,l="";function a(){u.push(l+n.substring(t,r)),l="",t=r+1}for(n+="",t=r=0;r<f;++r)if("\\"===(e=n[r]))l+=n.substring(t,r),l+=n.substring(++r,++r),t=r;else if(e===o)a(),o=null,c=-1;else{if(o)continue;t===c&&'"'===e||t===c&&"'"===e?(t=r+1,o=e):"."!==e||c?"["===e?(r>t&&a(),c=t=r+1):"]"===e&&(c||i("Access path missing open bracket: "+n),c>0&&a(),c=0,t=r+1):r>t?a():t=r+1}return c&&i("Access path missing closing bracket: "+n),o&&i("Access path missing closing quote: 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A(n,t,e,E(r),x(r))},n.zoomPow=function(n,t,e,r){return A(n,t,e,D(r),D(1/r))},n.zoomSymlog=function(n,t,e,r){return A(n,t,e,z(r),v(r))},Object.defineProperty(n,"__esModule",{value:!0})}));

index.d.ts

@@ -12,2 +12,3 @@ // Functions
 
+export function ascending(a: any, b: any): number;
 export function compare(fields: string | readonly string[] | AccessorFn | readonly AccessorFn[], orders?: Order | readonly Order[]): (a: any, b: any) => number;
@@ -56,3 +57,4 @@
   child: C,
-  parent: P
+  parent: P,
+  members?: object
 ): C & P;
@@ -59,0 +61,0 @@

index.js

@@ -48,3 +48,3 @@ export {
 export {default as clampRange} from './src/clampRange';
-export {default as compare} from './src/compare';
+export {default as compare, ascending} from './src/compare';
 export {default as constant} from './src/constant';
@@ -51,0 +51,0 @@ export {default as debounce} from './src/debounce';

package.json

 {
   "name": "vega-util",
-  "version": "1.14.1",
+  "version": "1.15.0",
   "description": "JavaScript utilities for Vega.",
@@ -25,3 +25,3 @@ "keywords": [
   },
-  "gitHead": "62565bbe084a422c4a0cbc6e19c6f7c45a3e5137"
+  "gitHead": "28db83352e43e321dfe55fc5cb6489b211e45662"
 }

README.md

@@ -40,2 +40,8 @@ # vega-util
 
+<a name="ascending" href="#ascending">#</a>
+vega.<b>ascending</b>(<i>a</i>, <i>b</i>)
+[<>](https://github.com/vega/vega/blob/master/packages/vega-util/src/compare.js "Source")
+
+A comparator function for sorting primitive and Date values in ascending order.
+
 <a name="compare" href="#compare">#</a>
@@ -218,6 +224,6 @@ vega.<b>compare</b>(<i>fields</i>[, <i>orders</i>])
 <a name="inherits" href="#inherits">#</a>
-vega.<b>inherits</b>(<i>child</i>, <i>parent</i>)
+vega.<b>inherits</b>(<i>child</i>, <i>parent</i>[, <i>members</i>])
 [<>](https://github.com/vega/vega/blob/master/packages/vega-util/src/inherits.js "Source")
 
-A convenience method for setting up object-oriented inheritance. Assigns the `prototype` property of the input *child* function, such that the *child* inherits the properties of the *parent* function's prototype via prototypal inheritance. Returns the new child prototype object.
+A convenience method for setting up object-oriented inheritance. Assigns the `prototype` property of the input *child* function, such that the *child* inherits the properties of the *parent* function's prototype via prototypal inheritance. The optional *members* argument is an object containing methods or properties to add to the new child prototype. Returns the new child prototype object.
 
@@ -224,0 +230,0 @@ <a name="lruCache" href="#lruCache">#</a>

src/accessors.js

 import accessor from './accessor';
 import field from './field';
 
-var empty = [];
+export const id = field('id');
 
-export var id = field('id');
+export const identity = accessor(function(_) { return _; }, [], 'identity');
 
-export var identity = accessor(function(_) { return _; }, empty, 'identity');
+export const zero = accessor(function() { return 0; }, [], 'zero');
 
-export var zero = accessor(function() { return 0; }, empty, 'zero');
+export const one = accessor(function() { return 1; }, [], 'one');
 
-export var one = accessor(function() { return 1; }, empty, 'one');
+export const truthy = accessor(function() { return true; }, [], 'true');
 
-export var truthy = accessor(function() { return true; }, empty, 'true');
-
-export var falsy = accessor(function() { return false; }, empty, 'false');
+export const falsy = accessor(function() { return false; }, [], 'false');

src/clampRange.js

@@ -9,3 +9,3 @@ /**
 export default function(range, min, max) {
-  var lo = range[0],
+  let lo = range[0],
       hi = range[1],
@@ -12,0 +12,0 @@ span;

src/compare.js

@@ -27,3 +27,3 @@ import {default as accessor, accessorFields} from './accessor';
 
-const compare = (u, v) => (u < v || u == null) && v != null ? -1
+export const ascending = (u, v) => (u < v || u == null) && v != null ? -1
   : (u > v || v == null) && u != null ? 1
@@ -39,3 +39,3 @@ : ((v = v instanceof Date ? +v : v), (u = u instanceof Date ? +u : u)) !== u && v === v ? -1
 const compare1 = (field, order) => function(a, b) {
-  return compare(field(a), field(b)) * order;
+  return ascending(field(a), field(b)) * order;
 };
@@ -49,3 +49,3 @@
       f = fields[i];
-      c = compare(f(a), f(b));
+      c = ascending(f(a), f(b));
     }
@@ -52,0 +52,0 @@ return c * orders[i];

src/constant.js

 import isFunction from './isFunction';
 
 export default function(_) {
-  return isFunction(_) ? _ : function() { return _; };
+  return isFunction(_) ? _ : () => _;
 }

src/debounce.js

 export default function(delay, handler) {
-  var tid, evt;
+  let tid;
 
-  function callback() {
-    handler(evt);
-    tid = evt = null;
-  }
-
-  return function(e) {
-    evt = e;
+  return e => {
     if (tid) clearTimeout(tid);
-    tid = setTimeout(callback, delay);
+    tid = setTimeout(
+      () => (handler(e), tid = null),
+      delay
+    );
   };
 }

src/extend.js

 export default function(_) {
-  for (var x, k, i=1, len=arguments.length; i<len; ++i) {
+  for (let x, k, i=1, len=arguments.length; i<len; ++i) {
     x = arguments[i];
@@ -4,0 +4,0 @@ for (k in x) { _[k] = x[k]; }

src/extent.js

@@ -6,3 +6,3 @@ /**
 export default function(array, f) {
-  var i = 0, n, v, min, max;
+  let i = 0, n, v, min, max;
 
@@ -9,0 +9,0 @@ if (array && (n = array.length)) {

src/extentIndex.js

 export default function(array, f) {
-  var i = -1,
+  let i = -1,
       n = array.length,
@@ -4,0 +4,0 @@ a, b, c, u, v;

src/fastmap.js

 import hasOwnProperty from './hasOwnProperty';
 
-var NULL = {};
+const NULL = {};
 
 export default function(input) {
-  var obj = {},
+  let obj = {},
       map,
@@ -51,3 +51,3 @@ test;
     clean() {
-      var next = {},
+      let next = {},
           size = 0,
@@ -54,0 +54,0 @@ key, value;

src/flush.js

@@ -6,3 +6,3 @@ import peek from './peek';
 
-  var a = range[0],
+  let a = range[0],
       b = peek(range),
@@ -9,0 +9,0 @@ t = +threshold,

src/inherits.js

@@ -1,5 +0,7 @@
-export default function(child, parent) {
-  var proto = (child.prototype = Object.create(parent.prototype));
+import extend from './extend';
+
+export default function(child, parent, members) {
+  const proto = (child.prototype = Object.create(parent.prototype));
   proto.constructor = child;
-  return proto;
+  return extend(proto, members);
 }

src/inrange.js

@@ -7,3 +7,3 @@ /**
 export default function(value, range, left, right) {
-  var r0 = range[0], r1 = range[range.length-1], t;
+  let r0 = range[0], r1 = range[range.length-1], t;
   if (r0 > r1) {
@@ -10,0 +10,0 @@ t = r0;

src/logger.js

 function log(method, level, input) {
-  var args = [level].concat([].slice.call(input));
+  const args = [level].concat([].slice.call(input));
   console[method].apply(console, args); // eslint-disable-line no-console
 }
 
-export var None  = 0;
-export var Error = 1;
-export var Warn  = 2;
-export var Info  = 3;
-export var Debug = 4;
+export const None  = 0;
+export const Error = 1;
+export const Warn  = 2;
+export const Info  = 3;
+export const Debug = 4;
 
 export default function(_, method) {
-  var level = _ || None;
+  let level = _ || None;
   return {
-    level: function(_) {
+    level(_) {
       if (arguments.length) {
@@ -23,15 +23,15 @@ level = +_;
     },
-    error: function() {
+    error() {
       if (level >= Error) log(method || 'error', 'ERROR', arguments);
       return this;
     },
-    warn: function() {
+    warn() {
       if (level >= Warn) log(method || 'warn', 'WARN', arguments);
       return this;
     },
-    info: function() {
+    info() {
       if (level >= Info) log(method || 'log', 'INFO', arguments);
       return this;
     },
-    debug: function() {
+    debug() {
       if (level >= Debug) log(method || 'log', 'DEBUG', arguments);
@@ -38,0 +38,0 @@ return this;

src/merge.js

 export default function(compare, array0, array1, output) {
-  var n0 = array0.length,
-      n1 = array1.length;
+  const n0 = array0.length,
+        n1 = array1.length;
 
@@ -8,3 +8,3 @@ if (!n1) return array0;
 
-  var merged = output || new array0.constructor(n0 + n1),
+  let merged = output || new array0.constructor(n0 + n1),
       i0 = 0, i1 = 0, i = 0;
@@ -11,0 +11,0 @@

src/mergeConfig.js

@@ -8,3 +8,3 @@ import isArray from './isArray';
   return configs.reduce((out, source) => {
-    for (var key in source) {
+    for (const key in source) {
       if (key === 'signals') {
@@ -20,3 +20,3 @@ // for signals, we merge the signals arrays
         // otherwise, no recursion: objects overwrite, no merging
-        var r = key === 'legend' ? {layout: 1}
+        const r = key === 'legend' ? {layout: 1}
           : key === 'style' ? true
@@ -34,3 +34,3 @@ : null;
 
-  var k, o;
+  let k, o;
   if (isObject(value) && !isArray(value)) {
@@ -37,0 +37,0 @@ o = isObject(output[key]) ? output[key] : (output[key] = {});

src/pad.js

 import repeat from './repeat';
 
 export default function(str, length, padchar, align) {
-  var c = padchar || ' ',
-      s = str + '',
-      n = length - s.length;
+  const c = padchar || ' ',
+        s = str + '',
+        n = length - s.length;
 
@@ -8,0 +8,0 @@ return n <= 0 ? s

src/repeat.js

 export default function(str, reps) {
-  var s = '';
+  let s = '';
   while (--reps >= 0) s += str;
   return s;
 }

src/splitAccessPath.js

 import error from './error';
 
 export default function(p) {
-  var path = [],
+  let path = [],
       q = null,
@@ -6,0 +6,0 @@ b = 0,

src/toDate.js

 import isDate from './isDate';
 import isNumber from './isNumber';
 
-function defaultParser(_) {
-  return isNumber(_) ? _ : isDate(_) ? _ : Date.parse(_);
-}
+const defaultParser = _ =>
+  isNumber(_) ? _ : isDate(_) ? _ : Date.parse(_);
 
@@ -8,0 +7,0 @@ export default function(_, parser) {

src/toSet.js

 export default function(_) {
-  for (var s={}, i=0, n=_.length; i<n; ++i) s[_[i]] = true;
+  const s = {},
+        n = _.length;
+  for (let i=0; i<n; ++i) s[_[i]] = true;
   return s;
 }

src/transform.js

@@ -5,28 +5,21 @@ import {identity} from './accessors';
 
-function exp(sign) {
-  return function(x) { return sign * Math.exp(x); };
-}
+const exp = sign =>
+  x => sign * Math.exp(x);
 
-function log(sign) {
-  return function(x) { return Math.log(sign * x); };
-}
+const log = sign =>
+  x => Math.log(sign * x);
 
-function symlog(c) {
-  return function(x) { return Math.sign(x) * Math.log1p(Math.abs(x / c)); };
-}
+const symlog = c =>
+  x => Math.sign(x) * Math.log1p(Math.abs(x / c));
 
-function symexp(c) {
-  return function(x) { return Math.sign(x) * Math.expm1(Math.abs(x)) * c; };
-}
+const symexp = c =>
+  x => Math.sign(x) * Math.expm1(Math.abs(x)) * c;
 
-function pow(exponent) {
-  return function(x) {
-    return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
-  };
-}
+const pow = exponent =>
+  x => x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
 
 function pan(domain, delta, lift, ground) {
-  var d0 = lift(domain[0]),
-      d1 = lift(peek(domain)),
-      dd = (d1 - d0) * delta;
+  const d0 = lift(domain[0]),
+        d1 = lift(peek(domain)),
+        dd = (d1 - d0) * delta;
 
@@ -57,5 +50,5 @@ return [
 function zoom(domain, anchor, scale, lift, ground) {
-  var d0 = lift(domain[0]),
-      d1 = lift(peek(domain)),
-      da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
+  const d0 = lift(domain[0]),
+        d1 = lift(peek(domain)),
+        da = anchor != null ? lift(anchor) : (d0 + d1) / 2;
 
@@ -73,3 +66,3 @@ return [
 export function zoomLog(domain, anchor, scale) {
-  var sign = Math.sign(domain[0]);
+  const sign = Math.sign(domain[0]);
   return zoom(domain, anchor, scale, log(sign), exp(sign));
@@ -76,0 +69,0 @@ }

src/truncate.js

 export default function(str, length, align, ellipsis) {
-  var e = ellipsis != null ? ellipsis : '\u2026',
-      s = str + '',
-      n = s.length,
-      l = Math.max(0, length - e.length);
+  const e = ellipsis != null ? ellipsis : '\u2026',
+        s = str + '',
+        n = s.length,
+        l = Math.max(0, length - e.length);
 
@@ -7,0 +7,0 @@ return n <= length ? s

src/visitArray.js

 export default function(array, filter, visitor) {
   if (array) {
     if (filter) {
-      var i = 0, n = array.length, t;
+      let i = 0, n = array.length, t;
       for (; i<n; ++i) {
@@ -6,0 +6,0 @@ if (t = filter(array[i])) visitor(t, i, array);

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Improved metrics

Total package byte prevSize

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increased by0.03%

Number of lines in readme file

562

increased by1.08%

Worsened metrics

Lines of code

1734

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