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fix not rendered style when style is optional #4528

Merged
5 changes: 1 addition & 4 deletions packages/mermaid/src/diagram-api/diagramAPI.ts
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,6 @@ import { addStylesForDiagram } from '../styles.js';
import { DiagramDefinition, DiagramDetector } from './types.js';
import * as _commonDb from '../commonDb.js';
import { parseDirective as _parseDirective } from '../directiveUtils.js';
import isEmpty from 'lodash-es/isEmpty.js';

/*
Packaging and exposing resources for external diagrams so that they can import
Expand Down Expand Up @@ -51,9 +50,7 @@ export const registerDiagram = (
if (detector) {
addDetector(id, detector);
}
if (!isEmpty(diagram.styles)) {
addStylesForDiagram(id, diagram.styles);
}
addStylesForDiagram(id, diagram.styles);

if (diagram.injectUtils) {
diagram.injectUtils(
Expand Down
11 changes: 8 additions & 3 deletions packages/mermaid/src/styles.ts
Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import type { FlowChartStyleOptions } from './diagrams/flowchart/styles.js';
import { log } from './logger.js';

const themes: Record<string, any> = {};
const themes: Record<string, (options?: any) => string> = {};
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const getStyles = (
type: string,
Expand Down Expand Up @@ -73,8 +73,13 @@ const getStyles = (
`;
};

export const addStylesForDiagram = (type: string, diagramTheme: unknown): void => {
themes[type] = diagramTheme;
export const addStylesForDiagram = (
type: string,
diagramTheme?: (options?: any) => string
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): void => {
if (diagramTheme !== undefined) {
themes[type] = diagramTheme;
}
};

export default getStyles;