Hi, The v4 document is available at https://echarts.apache.org/v4/en/option.html but the v3 doc is no longer available online. However, you can get the source code and host it on your local server. The source code is at https://github.com/apache/echarts-doc . You should need to date back to the previous commits to find the old versions. You can check the release date of the ECharts version you are using and then check out the doc on that day.
That being said, Apache ECharts try to compat with old versions when possible. So I would advise using the latest v5 version and see what's going wrong and then check the doc to see if you need to change anything. Migration guide from v4 to v5 is available at https://echarts.apache.org/handbook/en/basics/release-note/v5-upgrade-guide/ Thanks *Ovilia* On Fri, Jun 24, 2022 at 12:08 AM Stephane Jegaden < stephane.jega...@actility.com> wrote: > Several of our applications depend on an old version of the Echart library > 3.8.x, and we would like to migrate to a newer version 5.3.x. > > Unfortunately, API documentation for 5.3.x was hosted by > http://echarts.baidu.com and https://ecomfe.github.io< > https://ecomfe.github.io/echarts-doc/public/en/option.html> which no > longer exist. > > Do you still have these API documentations in HTML format, so that we can > migrate incrementally to the latest version? > > Thank you. > > >
