convert plots/plots.js to named exports

Convert 54 methods from aggregation pattern to named exports. Update
9 consumer files in the factory bundle to use named imports. Remove
`extendFlat(plots, Registry)` — consumers that accessed Registry
methods via Plots now use Registry directly.

Keep `export default plots` for backward compat with non-factory files.

Modest savings (~0.5 KB) since the default export keeps all methods
reachable. Full tree-shaking requires converting all consumers.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ryan-williams

perf/bundle-compare/thresholds.json

@@ -1,13 +1,13 @@
 {
     "upstream_full__min_": 4831947,
     "upstream_basic__min_": 1114816,
-    "fork_full__min_": 4797107,
-    "fork_basic__min_": 1083866,
-    "fork_minimal__min_": 976177,
-    "fork_lite__min_": 836151,
+    "fork_full__min_": 4795415,
+    "fork_basic__min_": 1082008,
+    "fork_minimal__min_": 974321,
+    "fork_lite__min_": 834293,
     "app___upstream_basic": 1115573,
-    "app___fork_basic": 1084014,
-    "app___fork_lite": 836243,
-    "fork_factory__min_": 710590,
-    "app___fork_factory": 710590
+    "app___fork_basic": 1082156,
+    "app___fork_lite": 834385,
+    "fork_factory__min_": 706417,
+    "app___fork_factory": 706417
 }

perf/thresholds.json

@@ -1,19 +1,19 @@
 {
     "bundleSize": {
         "lite": {
-            "expected_bytes": 1791466
+            "expected_bytes": 1790948
         },
         "lite-min": {
             "expected_bytes": 916326
         },
         "minimal": {
-            "expected_bytes": 2114209
+            "expected_bytes": 2113705
         },
         "minimal-min": {
             "expected_bytes": 1076875
         },
         "basic": {
-            "expected_bytes": 2419312
+            "expected_bytes": 2418808
         },
         "basic-min": {
             "expected_bytes": 1185641

src/components/legend/draw.js

@@ -2,7 +2,7 @@ import { select } from 'd3-selection';
 import { zoom as d3Zoom } from 'd3-zoom';
 import { drag as d3Drag } from 'd3-drag';
 import { constrain, ensureSingle, ensureSingleById, identity, isBottomAnchor, isCenterAnchor, isMiddleAnchor, isRightAnchor, log, syncOrAsync, templateString } from '../../lib/index.js';
-import Plots from '../../plots/plots.js';
+import { autoMargin, previousPromises } from '../../plots/plots.js';
 import Registry from '../../registry.js';
 import Events from '../../lib/events.js';
 import dragElement from '../dragelement/index.js';
@@ -145,7 +145,7 @@ function drawOne(gd, opts) {
     if(!inHover && (!fullLayout.showlegend || !legendData.length)) {
         layer.selectAll('.' + legendId).remove();
         fullLayout._topdefs.select('#' + clipId).remove();
-        return Plots.autoMargin(gd, legendId);
+        return autoMargin(gd, legendId);
     }
 
     var legend = ensureSingle(layer, 'g', legendId, function(s) {
@@ -206,7 +206,7 @@ function drawOne(gd, opts) {
     .each(function() { if(!inHover) select(this).call(setupTraceToggle, gd, legendId); });
 
     syncOrAsync([
-        Plots.previousPromises,
+        previousPromises,
         function() { return computeLegendDimensions(gd, groups, traces, legendObj); },
         function() {
             var gs = fullLayout._size;
@@ -973,7 +973,7 @@ function expandMargin(gd, legendId, lx, ly) {
     };
 
     if(isPaperX && isPaperY) {
-        return Plots.autoMargin(gd, legendId, {
+        return autoMargin(gd, legendId, {
             x: legendObj.x,
             y: legendObj.y,
             l: legendObj._width * (FROM_TL[xanchor]),

src/components/titles/index.js

@@ -1,7 +1,7 @@
 import { select } from 'd3-selection';
 function d3Round(x, n) { return n ? Math.round(x * (n = Math.pow(10, n))) / n : Math.round(x); }
 import isNumeric from 'fast-isnumeric';
-import Plots from '../../plots/plots.js';
+import { previousPromises } from '../../plots/plots.js';
 import Registry from '../../registry.js';
 import { bBoxIntersect, ensureSingle, extendFlat, strTranslate, syncOrAsync, templateString } from '../../lib/index.js';
 import { bBox, font } from '../drawing/index.js';
@@ -257,7 +257,7 @@ function draw(gd, titleClass, options) {
                 .call(svgTextUtils.convertToTspans, gd);
         }
 
-        return Plots.previousPromises(gd);
+        return previousPromises(gd);
     }
 
     function scootTitle(titleAndSubtitleEls) {

src/core-factory.js

@@ -24,7 +24,7 @@ import Registry from './registry.js';
 // to_image, validate, template_api, snapshot/download
 import main from './plot_api/plot_api.js';
 import FxModule from './components/fx/index.js';
-import PlotsModule from './plots/plots.js';
+import { resize, graphJson, sendDataToCloud } from './plots/plots.js';
 import { version } from './version.js';
 import './plotcss.js';
 
@@ -72,11 +72,7 @@ export function createPlotly({ traces = [], components = [], Icons, Snapshot, Pl
         delete window.PlotlyLocales;
     }
 
-    Plotly.Plots = {
-        resize: PlotsModule.resize,
-        graphJson: PlotsModule.graphJson,
-        sendDataToCloud: PlotsModule.sendDataToCloud,
-    };
+    Plotly.Plots = { resize, graphJson, sendDataToCloud };
     Plotly.Fx = {
         hover: FxModule.hover,
         unhover: FxModule.unhover,

src/plot_api/helpers.js

@@ -1,7 +1,8 @@
 import isNumeric from 'fast-isnumeric';
 import Registry from '../registry.js';
 import { isIndex, isPlainObject, log, nestedProperty, swapAttrs, warn } from '../lib/index.js';
-import Plots from '../plots/plots.js';
+// Note: subplotsRegistry access goes through Registry directly
+// (no longer mixed into Plots via extendFlat)
 import AxisIds from '../plots/cartesian/axis_ids.js';
 import Color from '../components/color/index.js';
 
@@ -38,10 +39,10 @@ export var cleanLayout = function (layout) {
         delete layout.scene1;
     }
 
-    var axisAttrRegex = (Plots.subplotsRegistry.cartesian || {}).attrRegex;
-    var polarAttrRegex = (Plots.subplotsRegistry.polar || {}).attrRegex;
-    var ternaryAttrRegex = (Plots.subplotsRegistry.ternary || {}).attrRegex;
-    var sceneAttrRegex = (Plots.subplotsRegistry.gl3d || {}).attrRegex;
+    var axisAttrRegex = (Registry.subplotsRegistry.cartesian || {}).attrRegex;
+    var polarAttrRegex = (Registry.subplotsRegistry.polar || {}).attrRegex;
+    var ternaryAttrRegex = (Registry.subplotsRegistry.ternary || {}).attrRegex;
+    var sceneAttrRegex = (Registry.subplotsRegistry.gl3d || {}).attrRegex;
 
     var keys = Object.keys(layout);
     for (i = 0; i < keys.length; i++) {
@@ -187,7 +188,7 @@ export var cleanData = function (data) {
 
         // scene ids scene1 -> scene
         if (traceIs(trace, 'gl3d') && trace.scene) {
-            trace.scene = Plots.subplotsRegistry.gl3d.cleanId(trace.scene);
+            trace.scene = Registry.subplotsRegistry.gl3d.cleanId(trace.scene);
         }
 
         if (!traceIs(trace, 'pie-like') && !traceIs(trace, 'bar-like')) {