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+---
+title: fmt.Erroridf
+linkTitle: erroridf
+description: Log a suppressable ERROR from a template.
+categories: [functions]
+keywords: []
+menu:
+  docs:
+    parent: functions
+function:
+  aliases: [erroridf]
+  returnType: string
+  signatures: ['fmt.Erroridf ID FORMAT [INPUT]']
+relatedFunctions:
+  - fmt.Errorf
+  - fmt.Erroridf
+  - fmt.Warnf
+aliases: [/functions/erroridf]
+---
+
+The documentation for [Go's fmt package] describes the structure and content of the format string.
+
+Like the  [`errorf`] function, the `erroridf` function evaluates the format string, prints the result to the ERROR log, then fails the build. Hugo prints each unique message once to avoid flooding the log with duplicate errors.
+
+Unlike the `errorf` function, you may suppress errors logged by the `erroridf` function by adding the message ID to the `ignoreErrors` array in your site configuration.
+
+This template code:
+
+```go-html-template
+{{ erroridf "error-42" "You should consider fixing this." }}
+```
+
+Produces this console log:
+
+```text
+ERROR You should consider fixing this.
+If you feel that this should not be logged as an ERROR, you can ignore it by adding this to your site config:
+ignoreErrors = ["error-42"]
+```
+
+To suppress this message:
+
+{{< code-toggle file=hugo copy=false >}}
+ignoreErrors = ["error-42"]
+{{< /code-toggle >}}
+
+[`errorf`]: /functions/fmt/errorf
+[Go's fmt package]: https://pkg.go.dev/fmt