How does webview communicate in electron

how does webview (externally linked site) in electron communicate (send + receive)?
if you use preload, it will only be executed when the page is loaded for the first time, and then it will not be loaded when you switch back.

Node.js client webview electron
Jul.29,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e922be-13b1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e922be-13b1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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