**BUG**
Concise problem statement:
Steps to reproduce bug:
1. Goto https://easyeda.com/Doc/Tutorial/API.htm#EasyEDA-API-Plug
2. Run script1 from "Run Script code" section "example 1 Art"
3. Run script2 from "Run Script code" section "example 2 Change track width and via hole size"
Results: Both scripts not working
Expected results: as tutorial
Browser: latest chrome
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