How does js implement selection and replication?

for example, how are all selections and copies in notes implemented?

Jquery replication javascript
Mar.04,2021

1. The main copy listener is the clipboard event. For the use of the clipboard event, please refer to copy text and copyright information function this article
2. Select all you can use document.createRange () to create a selection, and getSelection () is the content of the selection.

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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-64f5-1b3ac89-4eea6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3ac89-4eea6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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