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Data Binding DOCX or XLSX with JS

I want to make text changes in the content of uploaded XLSX or DOCX files. For example, I need to make definitions like Name: ${name}, Surname: ${surname}. How can I modify the ${XXXX} variables with parameters in my JavaScript commands that run the editor, or using another method?

Thanks & Best Regards

Is there anyone who can assist?

Hello @MemberEs
If I understand the scenario right, you can use DocBuilder to change some data in the files. For example, this method searchandreplace to change data in the files.
If I misunderstood the scenario, please clarify it and provide us with details.