<p></p>
<p><b>@pietervdvn</b> commented on this pull request.</p>
<hr>
<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/4402#discussion_r1425545046">app/assets/javascripts/user.js</a>:</p>
<pre style='color:#555'>> @@ -223,4 +223,62 @@ $(document).ready(function () {
$("#read_tou").on("click", function () {
$("#continue").prop("disabled", !($(this).prop("checked") && $("#read_ct").prop("checked")));
});
+
+
+ const isTaken /* Record<string, string> */ = {}
+
+ function indicateInvalidDisplayName(isValid /* boolean | undefined*/) {
+ // isValid might also be 'undefined', hence we check explicitly for 'true' and 'false'
+ $("#user_display_name").toggleClass("is-valid", isValid === true)
+ $("#user_display_name").toggleClass("is-invalid", isValid === false)
+ }
+
+ function checkDisplayName(){
+ const displayName = $("#user_display_name").val()
+ if(displayName === ""){
</pre>
<blockquote>
<p dir="auto">We don't really want to be duplicating validations on the client as they will just get out of sync.<br>
This is why it would probably better to have a specific backend method in the rails code that could be called with a proposed username and which would apply all the validations the user model will eventually apply.</p>
</blockquote>
<p dir="auto">Totally agree with this, but I have no idea how to do this. Even better would be to give a (translated) reason why it is not valid.</p>
<p dir="auto">However, this is already a step in the right direction...</p>
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