mermaid-js/mermaid · error · Error

Edge limit exceeded. ${this.edges.length} edges found, but t

Error message

Edge limit exceeded. ${this.edges.length} edges found, but the limit is ${this.config.maxEdges}.

Initialize mermaid with maxEdges set to a higher number to allow more edges.
You cannot set this config via configuration inside the diagram as it is a secure config.
You have to call mermaid.initialize.

What it means

Error "Edge limit exceeded. ${this.edges.length} edges found, but the limit is ${this.config.maxEdges}. Initialize mermaid with maxEdges set to a higher number to allow more edges. You cannot set this config via configuration inside the diagram as it is a secure config. You have to call mermaid.initialize." thrown in mermaid-js/mermaid.

Source

Thrown at packages/mermaid/src/diagrams/flowchart/flowDb.ts:334

      edge.id = id;
      edge.isUserDefinedId = true;
    } else {
      const existingLinks = this.edges.filter((e) => e.start === edge.start && e.end === edge.end);
      if (existingLinks.length === 0) {
        edge.id = getEdgeId(edge.start, edge.end, { counter: 0, prefix: 'L' });
      } else {
        edge.id = getEdgeId(edge.start, edge.end, {
          counter: existingLinks.length + 1,
          prefix: 'L',
        });
      }
    }

    if (this.edges.length < (this.config.maxEdges ?? 500)) {
      log.info('Pushing edge...');
      this.edges.push(edge);
    } else {
      throw new Error(
        `Edge limit exceeded. ${this.edges.length} edges found, but the limit is ${this.config.maxEdges}.

Initialize mermaid with maxEdges set to a higher number to allow more edges.
You cannot set this config via configuration inside the diagram as it is a secure config.
You have to call mermaid.initialize.`
      );
    }
  }

  private isLinkData(value: unknown): value is LinkData {
    return (
      value !== null &&
      typeof value === 'object' &&
      'id' in value &&
      typeof (value as LinkData).id === 'string'
    );
  }

View on GitHub (pinned to d93e9c88c0)

When it happens

Trigger: Thrown at packages/mermaid/src/diagrams/flowchart/flowDb.ts:334 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mermaid-js/mermaid@d93e9c88c0 (2026-08-12). Data as JSON: /api/errors/81b6f3fda52bdd85. Report an issue: GitHub.