I've got the following snippet:
<input type="date" ng-model="arrival" ng-model-options="{timezone: 'PST'}" />
<input type="time" ng-model="arrival" ng-model-options="{timezone: 'PST'}" />
{{arrival}}
That works properly (the date is displayed in UTC time converted from PST). I'm now trying to make the 'PST' option dynamic:
<select ng-model="timezone>
<option value="PST">PST</option>
<option value="EST">EST</option>
</select>
<input type="date" ng-model="arrival" ng-model-options="{timezone: timezone}" />
<input type="time" ng-model="arrival" ng-model-options="{timezone: timezone}" />
{{arrival}}
However, changing the timezone never update the arrival (it appears that binding doesn't work with nd-model-options). Any way I can force the fields to refresh when the timezone is changed?
Edit
Fiddle: https://jsfiddle.net/10nfqow9/
Create another directive (attribute type) with a high priority (higher than ng-model /ng-model-option's) that watches the options object for changes and triggers a recompile. My apologies for lack of specifics, I'm on a phone :)
EDIT: Looks like there's a directive called kcd-recompile that does exactly what I described. Here's a working plnkr, with some additional goodies for factoring in DST for american timezones.
HTML:
<div kcd-recompile="data.timezone">
<div>
<select ng-model="data.timezone" ng-options="x.offset as x.name for x in timezones">
</select>
</div>
<div>
<input type="date" ng-model="data.arrival" ng-model-options="{timezone: data.timezone}" />
</div>
<div>
<input type="time" ng-model="data.arrival" ng-model-options="{timezone: data.timezone}" />
</div>
</div>
And JS:
Date.prototype.stdTimezoneOffset = function() {
var jan = new Date(this.getFullYear(), 0, 1);
var jul = new Date(this.getFullYear(), 6, 1);
return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
}
Date.prototype.dst = function() {
return this.getTimezoneOffset() < this.stdTimezoneOffset();
}
angular.module('DemoApp', ['kcd.directives']);
angular.module('DemoApp')
.controller('DemoCtrl', ['$scope', function($scope) {
var now = new Date(),
isDst = now.dst();
$scope.data ={
arrival: now,
timezone: null
};
$scope.timezones = [
{
name: 'PST',
offset: isDst ? '-0700' : '-0800'
},
{
name: 'EST',
offset: isDst ? '-0400' : '-0500'
}
];
}]
);
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