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htmx-ext-error-page

v1.0.2

Published

This HTMX-Extension will open a new browser Tab, when an HTMX-Request failed, to easily debug your backend serving the HTMX-Endpoints

Downloads

22

Readme

HTMX Error Page

This is primarily a debug Tool to work with HTMX. It is an HTMX-Extension that opens any failed HTMX Requests in a new browser Tab. This helps debugging your server responses.

Enabling the extension

<body hx-ext="err-page">
...
</body>

Configuration

You can configure some of the behaviour with the following configurations:

  • enabled
  • eventName
  • isError()
  • errorHandler()

enabled

This enables or disables the whole functionality. You can use this in conjunction with an environment variable, to disable the extension in production, and reenable to debug.

default: true

eventName

This is the event, on which the extension listens. When this event fires, the whole error handling takes place.

default: 'htmx:beforeOnLoad'

isError()

This is a function, that returns either true or false. It decides if the request should be handled as an error or not. It takes the htmx-event as a parameter.

When you change eventName, you may also change this function.

See the htmx documentation for the configured event.

default:

function(evt) {
    return evt.detail.xhr.status >= 400;
}

errorHandler()

This is a function, that handles the request that isError() deemed as error. Per default, it opens a new browser tab, with the full html content of the errored response. It also takes the htmx event as a parameter.

default:

function(evt) {
    let tab = window.open('about:blank', '_blank');
    tab.document.write(evt.detail.xhr.responseText);
    tab.document.close();
}