8000 Cleaned up javascript code by flip111 · Pull Request #4376 · symfony/symfony-docs · GitHub
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Cleaned up javascript code #4376

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Cleaned up javascript code #4376

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9d29df6
Cleaned up javascript code
flip111 Oct 25, 2014
1c7836b
Added prevent default
flip111 Oct 26, 2014
9d41f67
moved preventdefault to the right place
flip111 Oct 26, 2014
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8 changes: 4 additions & 4 deletions reference/forms/types/collection.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -179,7 +179,9 @@ you need is the JavaScript:
var emailCount = '{{ form.emails|length }}';

jQuery(document).ready(function() {
jQuery('#add-another-email').click(function() {
jQuery('#add-another-email').click(function(e) {
e.preventDefault();

var emailList = jQuery('#email-fields-list');

// grab the prototype template
Expand All @@ -192,9 +194,7 @@ you need is the JavaScript:

// create a new list element and add it to the list
var newLi = jQuery('<li></li>').html(newWidget);
newLi.appendTo(jQuery('#email-fields-list'));

return false;
newLi.appendTo(emailList);
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now you removed return false, you should add e.preventDefault() on line 183 and an argument e in the event listener callback.

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Well i'm not sure the default does anything since it's an a href with action #. But i added it anyway ^^

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I'm not sure of the benefit removing the return false since it's more intuitive and easy to read than e.preventDefault() and have in this context the same role... :o

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They do not do the same thing. The PR description contains a link to an article about the differences.

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I think e.preventDefault() is easier, since its naming is clear about what it is doing: preventing the default behaviour. return false might be intuitive to JS developers, but it clearly isn't if you aren't used to program in JavaScript.

Furthermore, using it is consistent with the jQuery examples in the form collections cookbook (I think we might need to make them even more consistent).

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@flip111 to make the review complete, preventing the default is needed. Otherwise, the behavior of href="#" will be to make your browser scroll to the top of the page

});
})
</script>
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