How to use the search module in a function in client script?

Hello NetSuite Guru,

I created a button for the sales order form from User Event script, when user clicks on that button, the logic will be processed from a function in the client script attached on that form.

In the function to process the button, I created a search but NetSuite showed the error: Uncaught SyntaxError: illegal character U+200C

Here is the button I created in User event script:

context.form.addButton({

                     id: "custpage_overwrite_amt_button",

                     label: "Update amount",

                     functionName: 'updateAmt('+ recordId + ')'

                  });

               context.form.clientScriptModulePath = "SuiteScripts/CustomerClientScript";

And in the CustomerClientScript.js client script, the updateAmt function creates the search as below: