[Feature] 哪里可以看到旧版的文档, 比如4.9

[a15218378694]

What problem does this feature solve?

项目用了旧版的echart, 多个地方用了, 不好升级

What does the proposed API look like?

没有

[echarts-bot]

@a15218378694 It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

[Feature] Where can I see older versions of documentation, such as 4.9

BODY

What problem does this feature solve?

The project used the old version of echart, which was used in many places, and it was not easy to upgrade

What does the proposed API look like?

No

[pissang]

https://echarts.apache.org/v4/zh/option.html#title