Google Script - Using a JS variable in html file

Question

I want to include a variable that I normally use in a .gs file in my html file. For example, the following code would make variable 'value' be the content of whatever is in cell A1:

var value = SpreadsheetApp.getActiveSheet().getRange("A1").getValue();

How can I include this variable in my .html file, so that typing 'value' in the html file will return the contents of cell A1?

EDIT

What I'm trying to achieve is build a mail action button that automatically submits a google form, filled with the data in the spreadsheet. The script I have for the .html file is as follows:

<div>
<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "EmailMessage",
  "action": {
    "@type": "ConfirmAction",
    "name": "Accept",
    "handler": {
      "@type": "HttpActionHandler",
      "url": "https://docs.google.com/forms/d/139j-0POMG9BVqttXnY8l-6YMI7M2DReREIuJJd_waJE/formResponse?ifq&entry.1766440389=" + value + "&entry.1329637906&submit=Submit"
    }
  },
  "description": ""
}

</script>

</div>

The button works perfectly fine, but I need to prefill the form by adding the variable in the middle of the url (under 'handler' where I typed " + value + "), containing the contents of the cell. Only problem is that I can't figure out how to integrate that variable in the .html file

Answer 1

You have a text formula:

"url": "https://docs.google.com/forms/d/139j-0POMG9BVqttXnY8l-6YMI7M2DReREIuJJd_waJE/formResponse?ifq&entry.1766440389=" + value + "&entry.1329637906&submit=Submit"

And you are adding a variable to a URL search string. You want the value to be looked up from the spreadsheet, and put into the URL.

So, I guess you have a button that starts the process? When the button is clicked, it should run google.script.run . Then, when the server side .gs function is done running, it will return a value, and you will need an withSuccessHandler(function) to start the function that will take the returned value, and put it into the URL.

Start with reading the documentation for google.script.run .