TYPO3 - How to add a placeholder to an input field?

问题

In TYPO3 (7.2.0) using the standard template engine, is there a way to add a placeholder attribute to the standard mail form text input?

At the moment I am using JavaScript to convert the labels into placeholders, but I am open to suggestions on a better way to do this...

回答1:

The suggested solution of @biesior does only work for EXT:form 7.4 and higher (see changelog). The supplied picture shows the form wizard of TYPO3 7.5 or 7.6. In 7.2 you won't find any placeholder attribute in the wizard.

I recommend updating to TYPO3 7.6 since this version includes a major rewrite of EXT:form. You will be able to use fluid templates to customize your forms. Furthermore HTML5 attributes are possible. Before the rewrite the set of allowed attributes was quite limited. Now you are able to add all attributes you can think of (for example "data-"). See changelog.

If you have any questions regarding EXT:form join the channel on Slack. If you don't know Slack yet, check out the invite function.

回答2:

During form fields editing you have many properties, also Placeholder

in text version it will be:

10 = TEXTLINE
10 {
    type = text
    class = foo-class
    id = foo-id
    name = foo
    placeholder = Hmmm?
    required = required
    label {
        value = My Field
    }
}

来源：https://stackoverflow.com/questions/35929688/typo3-how-to-add-a-placeholder-to-an-input-field