How to Access a Go Array in Javascript?

Referencing Go Array in Javascript

Parsing the Issue

In your Golang code, you have an array that you're passing to an HTML file on the front end. You're trying to iterate through the array in Javascript using a for-loop, but the Javascript code fails to load.

Understanding Template Actions

It's important to note that template actions like {{index .Array 0}} are executed server-side in Go, while Javascript code runs client-side in the browser. These two environments are separate, so template parameters and values do not exist client-side, and Javascript code cannot execute template actions.

Finding a Solution

Two options are available:

1. Using Template Actions: You can use {{range .Array}} to iterate through the array on the server-side and generate HTML elements for each element.
2. Creating a Javascript Array: You can use a template to create Javascript code that constructs an array on the client-side.

Elaborating on #1

The {{range}} template action allows you to loop over Array and set the pipeline to the array elements. You can then output the elements like so:

{{range .Array}}
    {{.}}
{{end}}

Elaborating on #2

If you need to process the array in Javascript, you can create a Javascript array using a template like this:

<script>
    var arr = [
        {{range .Array}}
            {{.}},
        {{end}}
    ];
</script>

Alternatively, you can directly render the array as a Javascript array:

<script>
    var arr = {{.Array}};
</script>

Now, you have a Javascript array, arr, that you can iterate through and process in Javascript.

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