silverstripe-framework/javascript/UpdateURL.js

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JavaScript
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Behaviour.register({
'input#Form_EditForm_Title': {
/**
* Get the URL segment to suggest a new field
*/
onchange: function() {
if( this.value.length == 0 )
return;
var urlSegmentField = $('Form_EditForm_URLSegment');
var newSuggestion = urlSegmentField.suggestNewValue( this.value.toLowerCase() );
var isNew = $('Form_EditForm_ID').value.indexOf("new") == 0;
if( newSuggestion == urlSegmentField.value || isNew || confirm( 'Would you like me to change the URL to:\n\n' + newSuggestion + '/\n\nClick Ok to change the URL, click Cancel to leave it as:\n\n' + urlSegmentField.value ) )
urlSegmentField.value = newSuggestion;
}
}
});