Core: Use named exports in `src/`

The `default` export is treated differently across tooling when transpiled
to CommonJS - tools differ on whether `module.exports` represents the full
module object or just its default export. Switch `src/` modules to named
exports for tooling consistency.

Fixes gh-5262
Closes gh-5292

14 files changed, 32 insertions, 44 deletions

diff --git a/src/css/adjustCSS.js b/src/css/adjustCSS.js
index d973ff386..a5263f099 100644
--- a/src/css/adjustCSS.js
+++ b/src/css/adjustCSS.js
@@ -1,8 +1,8 @@
-import jQuery from "../core.js";
-import isAutoPx from "./isAutoPx.js";
-import rcssNum from "../var/rcssNum.js";
+import { jQuery } from "../core.js";
+import { isAutoPx } from "./isAutoPx.js";
+import { rcssNum } from "../var/rcssNum.js";
 
-function adjustCSS( elem, prop, valueParts, tween ) {
+export function adjustCSS( elem, prop, valueParts, tween ) {
 	var adjusted, scale,
 		maxIterations = 20,
 		currentValue = tween ?
@@ -66,5 +66,3 @@ function adjustCSS( elem, prop, valueParts, tween ) {
 	}
 	return adjusted;
 }
-
-export default adjustCSS;
diff --git a/src/css/cssCamelCase.js b/src/css/cssCamelCase.js
index c75dcd950..a87897989 100644
--- a/src/css/cssCamelCase.js
+++ b/src/css/cssCamelCase.js
@@ -1,4 +1,4 @@
-import camelCase from "../core/camelCase.js";
+import { camelCase } from "../core/camelCase.js";
 
 // Matches dashed string for camelizing
 var rmsPrefix = /^-ms-/;
@@ -7,8 +7,6 @@ var rmsPrefix = /^-ms-/;
 // Used by the css & effects modules.
 // Support: IE <=9 - 11+
 // Microsoft forgot to hump their vendor prefix (trac-9572)
-function cssCamelCase( string ) {
+export function cssCamelCase( string ) {
 	return camelCase( string.replace( rmsPrefix, "ms-" ) );
 }
-
-export default cssCamelCase;
diff --git a/src/css/curCSS.js b/src/css/curCSS.js
index 72c3db9f5..06394f315 100644
--- a/src/css/curCSS.js
+++ b/src/css/curCSS.js
@@ -1,10 +1,10 @@
-import jQuery from "../core.js";
-import isAttached from "../core/isAttached.js";
-import getStyles from "./var/getStyles.js";
-import rcustomProp from "./var/rcustomProp.js";
-import rtrim from "../var/rtrim.js";
+import { jQuery } from "../core.js";
+import { isAttached } from "../core/isAttached.js";
+import { getStyles } from "./var/getStyles.js";
+import { rcustomProp } from "./var/rcustomProp.js";
+import { rtrim } from "../var/rtrim.js";
 
-function curCSS( elem, name, computed ) {
+export function curCSS( elem, name, computed ) {
 	var ret,
 		isCustomProp = rcustomProp.test( name );
 
@@ -57,5 +57,3 @@ function curCSS( elem, name, computed ) {
 		ret + "" :
 		ret;
 }
-
-export default curCSS;
diff --git a/src/css/finalPropName.js b/src/css/finalPropName.js
index 40d2fb193..b11e92394 100644
--- a/src/css/finalPropName.js
+++ b/src/css/finalPropName.js
@@ -1,4 +1,4 @@
-import document from "../var/document.js";
+import { document } from "../var/document.js";
 
 var cssPrefixes = [ "Webkit", "Moz", "ms" ],
 	emptyStyle = document.createElement( "div" ).style,
@@ -20,7 +20,7 @@ function vendorPropName( name ) {
 }
 
 // Return a potentially-mapped vendor prefixed property
-function finalPropName( name ) {
+export function finalPropName( name ) {
 	var final = vendorProps[ name ];
 
 	if ( final ) {
@@ -31,5 +31,3 @@ function finalPropName( name ) {
 	}
 	return vendorProps[ name ] = vendorPropName( name ) || name;
 }
-
-export default finalPropName;
diff --git a/src/css/hiddenVisibleSelectors.js b/src/css/hiddenVisibleSelectors.js
index 1f892dfe0..5e0709481 100644
--- a/src/css/hiddenVisibleSelectors.js
+++ b/src/css/hiddenVisibleSelectors.js
@@ -1,4 +1,4 @@
-import jQuery from "../core.js";
+import { jQuery } from "../core.js";
 
 import "../selector.js";
 
diff --git a/src/css/isAutoPx.js b/src/css/isAutoPx.js
index ca9b35aca..96501be01 100644
--- a/src/css/isAutoPx.js
+++ b/src/css/isAutoPx.js
@@ -23,7 +23,7 @@ var ralphaStart = /^[a-z]/,
 	//                           \ Max /       \ Height /
 	rautoPx = /^(?:Border(?:Top|Right|Bottom|Left)?(?:Width|)|(?:Margin|Padding)?(?:Top|Right|Bottom|Left)?|(?:Min|Max)?(?:Width|Height))$/;
 
-function isAutoPx( prop ) {
+export function isAutoPx( prop ) {
 
 	// The first test is used to ensure that:
 	// 1. The prop starts with a lowercase letter (as we uppercase it for the second regex).
@@ -31,5 +31,3 @@ function isAutoPx( prop ) {
 	return ralphaStart.test( prop ) &&
 		rautoPx.test( prop[ 0 ].toUpperCase() + prop.slice( 1 ) );
 }
-
-export default isAutoPx;
diff --git a/src/css/showHide.js b/src/css/showHide.js
index dc273f98c..77ddc5bdb 100644
--- a/src/css/showHide.js
+++ b/src/css/showHide.js
@@ -1,6 +1,6 @@
-import jQuery from "../core.js";
-import dataPriv from "../data/var/dataPriv.js";
-import isHiddenWithinTree from "../css/var/isHiddenWithinTree.js";
+import { jQuery } from "../core.js";
+import { dataPriv } from "../data/var/dataPriv.js";
+import { isHiddenWithinTree } from "../css/var/isHiddenWithinTree.js";
 
 var defaultDisplayMap = {};
 
@@ -27,7 +27,7 @@ function getDefaultDisplay( elem ) {
 	return display;
 }
 
-function showHide( elements, show ) {
+export function showHide( elements, show ) {
 	var display, elem,
 		values = [],
 		index = 0,
@@ -96,5 +96,3 @@ jQuery.fn.extend( {
 		} );
 	}
 } );
-
-export default showHide;
diff --git a/src/css/support.js b/src/css/support.js
index cf9f0cfcd..5f9b37d7f 100644
--- a/src/css/support.js
+++ b/src/css/support.js
@@ -1,6 +1,6 @@
-import document from "../var/document.js";
-import documentElement from "../var/documentElement.js";
-import support from "../var/support.js";
+import { document } from "../var/document.js";
+import { documentElement } from "../var/documentElement.js";
+import { support } from "../var/support.js";
 
 ( function() {
 
@@ -58,4 +58,4 @@ support.reliableTrDimensions = function() {
 };
 } )();
 
-export default support;
+export { support };
diff --git a/src/css/var/cssExpand.js b/src/css/var/cssExpand.js
index 66062e2ee..10f4e89d2 100644
--- a/src/css/var/cssExpand.js
+++ b/src/css/var/cssExpand.js
@@ -1 +1 @@
-export default [ "Top", "Right", "Bottom", "Left" ];
+export var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
diff --git a/src/css/var/getStyles.js b/src/css/var/getStyles.js
index d25af6752..9dc4298d5 100644
--- a/src/css/var/getStyles.js
+++ b/src/css/var/getStyles.js
@@ -1,4 +1,4 @@
-export default function( elem ) {
+export function getStyles( elem ) {
 
 	// Support: IE <=11+ (trac-14150)
 	// In IE popup's `window` is the opener window which makes `window.getComputedStyle( elem )`
diff --git a/src/css/var/isHiddenWithinTree.js b/src/css/var/isHiddenWithinTree.js
index c88747827..22b8221f9 100644
--- a/src/css/var/isHiddenWithinTree.js
+++ b/src/css/var/isHiddenWithinTree.js
@@ -1,4 +1,4 @@
-import jQuery from "../../core.js";
+import { jQuery } from "../../core.js";
 
 // isHiddenWithinTree reports if an element has a non-"none" display style (inline and/or
 // through the CSS cascade), which is useful in deciding whether or not to make it visible.
@@ -7,7 +7,7 @@ import jQuery from "../../core.js";
 // * Being disconnected from the document does not force an element to be classified as hidden.
 // These differences improve the behavior of .toggle() et al. when applied to elements that are
 // detached or contained within hidden ancestors (gh-2404, gh-2863).
-export default function( elem, el ) {
+export function isHiddenWithinTree( elem, el ) {
 
 	// isHiddenWithinTree might be called from jQuery#filter function;
 	// in that case, element will be second argument
diff --git a/src/css/var/rcustomProp.js b/src/css/var/rcustomProp.js
index f435e7cd7..18b8686c4 100644
--- a/src/css/var/rcustomProp.js
+++ b/src/css/var/rcustomProp.js
@@ -1 +1 @@
-export default ( /^--/ );
+export var rcustomProp = /^--/;
diff --git a/src/css/var/rnumnonpx.js b/src/css/var/rnumnonpx.js
index 18a9dad6c..0386b0054 100644
--- a/src/css/var/rnumnonpx.js
+++ b/src/css/var/rnumnonpx.js
@@ -1,3 +1,3 @@
-import pnum from "../../var/pnum.js";
+import { pnum } from "../../var/pnum.js";
 
-export default new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
+export var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
diff --git a/src/css/var/swap.js b/src/css/var/swap.js
index f5d8f23ab..90b31d584 100644
--- a/src/css/var/swap.js
+++ b/src/css/var/swap.js
@@ -1,5 +1,5 @@
 // A method for quickly swapping in/out CSS properties to get correct calculations.
-export default function( elem, options, callback ) {
+export function swap( elem, options, callback ) {
 	var ret, name,
 		old = {};