Submission Validation with the Crowd Template on MTurk

问题

I have a mturk survey and would like to validate the results when clicking the submit button. I found out there is one way discussed here. However, that does not seem to work. Does anyone have any idea?

My code (JS part):

<script type="text/javascript">
window.onload = function() {document.getElementById('submitButton').setAttribute('onclick', 'return validateForm()'); }

function validateForm() {
    alert("test");
    return false;
}

There is no alert and the submission succeeded.

回答1:

With the new Crowd HTML Elements, you can hook into the submit event and do your pre-validation like this:

document.querySelector('crowd-form').onsubmit = function(e ) {
    if (!validateForm()) {
        e.preventDefault();
    }
}

Thank you,

Amazon Mechanical Turk

来源：https://stackoverflow.com/questions/54266891/submission-validation-with-the-crowd-template-on-mturk