[Documentation] For time axis (type: "time"), you should tell what type string the x field accepts:

[xuanhun]

Documentation Title or Section

Issue Description or Suggestion

for example:

• Note: For time axis (type: "time"), the x field accepts:
• • Number (timestamp in milliseconds): Recommended for performance
• • Date object: Will be converted automatically
• • ISO 8601 string: e.g., "2023-10-05T12:00:00.000Z"