diff --git a/packages/components/src/components/SquiggleChart.tsx b/packages/components/src/components/SquiggleChart.tsx
index 8730beaa..235a4cee 100644
--- a/packages/components/src/components/SquiggleChart.tsx
+++ b/packages/components/src/components/SquiggleChart.tsx
@@ -3,16 +3,17 @@ import _ from "lodash";
 import styled from "styled-components";
 import {
   run,
-  runPartial,
   errorValueToString,
   squiggleExpression,
   bindings,
   samplingParams,
+  parameters,
+  defaultParameters,
+  defaultBindings,
 } from "@quri/squiggle-lang";
 import { NumberShower } from "./NumberShower";
 import { DistributionChart } from "./DistributionChart";
 import { ErrorBox } from "./ErrorBox";
-import useSize from "@react-hook/size";
 
 const variableBox = {
   Component: styled.div`
@@ -152,6 +153,8 @@ export interface SquiggleChartProps {
   height?: number;
   /** Bindings of previous variables declared */
   bindings?: bindings;
+  /** JS imported parameters */
+  parameters?: parameters;
 }
 
 const ChartWrapper = styled.div`
@@ -166,14 +169,20 @@ export const SquiggleChart: React.FC<SquiggleChartProps> = ({
   outputXYPoints = 1000,
   onChange = () => {},
   height = 60,
-  bindings = {},
+  bindings = defaultBindings,
+  parameters = defaultParameters,
   width = NaN,
 }: SquiggleChartProps) => {
   let samplingInputs: samplingParams = {
     sampleCount: sampleCount,
     xyPointLength: outputXYPoints,
   };
-  let expressionResult = run(squiggleString, bindings, samplingInputs);
+  let expressionResult = run(
+    squiggleString,
+    bindings,
+    samplingInputs,
+    parameters
+  );
   let internal: JSX.Element;
   if (expressionResult.tag === "Ok") {
     let expression = expressionResult.value;
diff --git a/packages/components/src/components/SquiggleEditor.tsx b/packages/components/src/components/SquiggleEditor.tsx
index f85cf1e8..67f2e73b 100644
--- a/packages/components/src/components/SquiggleEditor.tsx
+++ b/packages/components/src/components/SquiggleEditor.tsx
@@ -3,8 +3,17 @@ import * as ReactDOM from "react-dom";
 import { SquiggleChart } from "./SquiggleChart";
 import { CodeEditor } from "./CodeEditor";
 import styled from "styled-components";
-import type { squiggleExpression, bindings } from "@quri/squiggle-lang";
-import { runPartial, errorValueToString } from "@quri/squiggle-lang";
+import type {
+  squiggleExpression,
+  bindings,
+  parameters,
+} from "@quri/squiggle-lang";
+import {
+  runPartial,
+  errorValueToString,
+  defaultParameters,
+  defaultBindings,
+} from "@quri/squiggle-lang";
 import { ErrorBox } from "./ErrorBox";
 
 export interface SquiggleEditorProps {
@@ -30,6 +39,8 @@ export interface SquiggleEditorProps {
   width: number;
   /** Previous variable declarations */
   bindings: bindings;
+  /** JS Imported parameters */
+  parameters: parameters;
 }
 
 const Input = styled.div`
@@ -50,7 +61,8 @@ export let SquiggleEditor: React.FC<SquiggleEditorProps> = ({
   diagramCount,
   onChange,
   environment,
-  bindings = {},
+  bindings = defaultBindings,
+  parameters = defaultParameters,
 }: SquiggleEditorProps) => {
   let [expression, setExpression] = React.useState(initialSquiggleString);
   return (
@@ -77,6 +89,7 @@ export let SquiggleEditor: React.FC<SquiggleEditorProps> = ({
         environment={environment}
         onChange={onChange}
         bindings={bindings}
+        parameters={parameters}
       />
     </div>
   );
@@ -134,13 +147,16 @@ export interface SquigglePartialProps {
   /** The width of the element */
   width: number;
   /** Previously declared variables */
-  bindings: bindings;
+  bindings?: bindings;
+  /** Parameters imported from js */
+  parameters?: parameters;
 }
 
 export let SquigglePartial: React.FC<SquigglePartialProps> = ({
   initialSquiggleString = "",
   onChange,
-  bindings,
+  bindings = defaultBindings,
+  parameters = defaultParameters,
 }: SquigglePartialProps) => {
   let [expression, setExpression] = React.useState(initialSquiggleString);
   let squiggleResult = runPartial(expression, bindings);
diff --git a/packages/squiggle-lang/src/js/index.ts b/packages/squiggle-lang/src/js/index.ts
index cd63c922..1c0fb4e3 100644
--- a/packages/squiggle-lang/src/js/index.ts
+++ b/packages/squiggle-lang/src/js/index.ts
@@ -48,7 +48,12 @@ import {
   Constructors_pointwiseLogarithm,
   Constructors_pointwisePower,
 } from "../rescript/Distributions/DistributionOperation/DistributionOperation.gen";
-export type { samplingParams, errorValue, externalBindings as bindings };
+export type {
+  samplingParams,
+  errorValue,
+  externalBindings as bindings,
+  parameters,
+};
 
 export let defaultSamplingInputs: samplingParams = {
   sampleCount: 10000,
@@ -102,8 +107,8 @@ export function run(
   samplingInputs?: samplingParams,
   parameters?: parameters
 ): result<squiggleExpression, errorValue> {
-  let b = bindings ? bindings : {};
-  let p = parameters ? parameters : {};
+  let b = bindings ? bindings : defaultBindings;
+  let p = parameters ? parameters : defaultParameters;
   let si: samplingParams = samplingInputs
     ? samplingInputs
     : defaultSamplingInputs;
@@ -120,8 +125,8 @@ export function runPartial(
   _samplingInputs?: samplingParams,
   parameters?: parameters
 ): result<externalBindings, errorValue> {
-  let b = bindings ? bindings : {};
-  let p = parameters ? parameters : {};
+  let b = bindings ? bindings : defaultBindings;
+  let p = parameters ? parameters : defaultParameters;
 
   return evaluatePartialUsingExternalBindings(
     squiggleString,
@@ -144,6 +149,9 @@ function mergeParameters(
 
 type parameters = { [key: string]: jsValue };
 
+export let defaultParameters: parameters = {};
+export let defaultBindings: externalBindings = {};
+
 type jsValue =
   | string
   | number