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Perform mail merge in Document Editor client-side without any server-side dependencies.
At present, we can perform mail merge in the server-side using Syncfusion Word (DocIO) library.
Demo link: https://ej2.syncfusion.com/demos/#/material/document-editor/mail-merge.html
KB link: https://www.syncfusion.com/kb/10293/how-to-perform-mail-merge-in-asp-net-mvc
You can design Word template for mail merge in Documenteditor using insertField API in editor module.