Why Use a Dash in Go Template Conditionals?

Dash Utilization in Go Templates' Conditionals

In Go templates, the {{- if ...}} syntax is often encountered to execute conditional statements. The dash - before the if keyword serves a specific purpose.

Purpose of the Dash

The primary function of the dash in {{- if ...}} templates is to eliminate spaces from the output on the side of the template where it appears.

Output Modification

When the dash is placed before the if condition, as shown in the example:

{{- if hasKey .Values.mymap "mykey" }}
    # do something conditional here...
{{- end }}

It prevents any whitespace that precedes the conditional statement from being printed along with the output of the statement. This ensures that if the condition evaluates to true, its output will be printed immediately after the last piece of text, without any intervening whitespace.

This is particularly useful in situations where multiple statements are executed sequentially and you desire a compact output without any line breaks or spaces between them.

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