detectType keep throw Error

[ZiuChen]

I tried to check if a string is a mermaid chart using mermaid.detectType,
however I can't do this using the examples in the documentation:

import mermaid from 'mermaid';

const diagram = `graph LR
a-->b
b-->c
c-->d
d-->e
e-->f
f-->g
g-->h`;

try {
  const type = mermaid.detectType(diagram); // this keep throw error
  console.log('type:', type);
} catch (error) {
  console.error('detectType:', error);
}

Reproduction (Stackblitz)

[A9G-Data-Droid]

You have to call initialize first.

mermaid.initialize()