how to use json in sharepoint list column

Question

how to use json in sharepoint list column to change the text in Multiple lines of text column to a hyperlink Where the characters are more than 256

Answer 1

@Wael Saleh Abughres
The multiple line text column needs to be set to allow only Plain text since (Enhanced) Rich text will add additional elements to the column values so that it breaks the formatted hyperlinks. Then you add links URLs as text in the multiple line text column.

Here’s a sample script for JSON formatting:

{  
   "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",  
   "elmType": "a",  
   "txtContent": "=if(@currentField=='','','Click Here')",  
   "attributes": {  
      "target": "_blank",  
      "href": "=@currentField"  
   }  
}  

Reference:
Create clickable actions - Turn field values into hyperlinks.

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