I have a directive that takes "previewHTML" as a $scope variable input. I simply want to insert this HTML into a div in my directive template.
I've been working on this problem for a week trying methods from using ng-bind-html, {{}}, $sce, $compile and everything I could think of inbetween; I'm at a loss of why this is so painfully difficult.
The closest I've gotten is to create a scope using $rootScope.$new(true), then attach the variables I need "newScope.value = 'myvalue'", then use $compile to compile the preview HTML and in the cloneAttachFn (which I assume is a callback for when it's finished compiling) I set the previewHTML scope variable, which is included as '< ... ng-bind-html="previewHTML">'
The html without the scope applied comes out fine, but the bindings aren't set. The weird thing is that in the object they are set, but in the outputted HTML they are not; meaning the element has been created, but the bindings haven't been set yet. Unfortunately, Angular won't take a jquery HTML object in ng-bind-html, even though it returns a jquery object in order to maintain the bindings in the HTML.
I'm going to have to use a timeout for now... but does anyone know how to do this very rudimentary thing of including html, that has binding, in a directive template (it has to come from a $scope variable, or at least be generated outside of the directive by the user of the directive)? [is it even async? The documentation is frustratingly unclear]
(Honestly, I'm tens of thousands of lines and a year in and the more I use Angular the more I'd rather use plain JS)
Related
I use ui-router to create routes with multiple HTML pages.
I have custom "target" directives within these pages that use $state.current in various ways.
But I also have other custom "lookup" directives in other states which load these HTML "templates", find these "target" directives, compile them and insert them into the DOM.
The problem I am having is that when the HTML content is compiled in these second directives, $state.current obviously refers to whatever state the application is in when it is compiled, whereas I would like the directive to compile as if it was in its "native" state.
Is there any (easy-ish!) way to get a reference to the target directive's "native" state? i.e. the state connected to the .HTML file which the directive is in? Is there a method (angular, jquery, native js or anything else) to get from the directive to the HTML template file? Then I could do a reverse lookup on the state objects. element.ownerDocument can get the URL of the current state, but not the HTML file of the template.
Alternatively, if the second directive had a reference to the "target" state, how should I modify the "target" directive so that it takes a state reference when it is compiled in both scenarios? Something in the compile function perhaps?? - but the docs don't seem to cover this kind of use case... I could do with a pointer in the right direction.
I hope that all makes sense. I have looked around for similar answers, but I guess this is an unusual use case? I'll knock up a Plunker shortly to help illustrate...
When you compile HTML using $compile, you pass in a scope object. Instead of using $state.current within the directive, could you attach the "state" you need to the scope object that you're passing in?
I have an Angular app with a custom element directive (<uber-table>). <uber-table> is supposed to take a collection of objects, render them into a <table> and add some functionality (click row to toggle the underlying object as selected, search box for live filtering, action links on each row with customized click callback(s) for each object). I created a Plunker with the relevant code. Please note that Plunker is giving an error about map (Object [object Object] has no method 'map'), but locally I am not getting any errors.
The post-link function's element parameter is not the <uber-table> element as I expected. Instead it is the template's <div class="uber-table"> element. This is preventing me from extracting data from <uber-table>. What am I doing wrong? Any help will be much appreciated.
Here's a rundown on some of the issues.
First main issue is you want existing content already within the uber-table markup to exist, as well as a new template. Unless told otherwise the existing content ( columns) in this case will be overwritten. In order to include existing content in a directive that has a template, you need to set transclude:true then identify within template where this existing content needs to be placed using ng-transclude on element that will be parent of the content.
Here's demo with transclude fixed
New problems arise now where you are trying to use jQuery to loop over columns and return angular attrs => column.attrs . This throws undefined error.
I haven't tried to unravel this enough to sort out the columns issues yet. They should likely be handled by directive of their own
UPDATE: here's slightly revised error free version using jQuery to parse column count. I'm afraid am still confused a bit by structure of this. I don't see need to use jQuery to parse colunms, this could be converted to directive or pass column definitions into main directive from controller scope
After trying several things and looking at the documentation again, I finally got it working. The solution was to put the post-link function inside the compile function. Also I had to update my isolated scope to use =, set replace to true and set transclude to 'element'.
I updated Plunker if anybody wants to see the changes. The Plunker version isn't working, but since it is working locally, I'm not going to spend too much time on it.
I have a page that has a number of directives. There are a number of directives in the header/navigation each with there own scope. There is also a ng-repeat of 25 items and each one of those creates a directive each with its own scope.
One of the directives includes a form that includes a custom filter to display form errors, it looks like this:
<span>{{ createProjectForm.name.$error | nagParseErrors }}</span>
Now the concern I have right now is that nagParseErrors is being executed about 33 times when anything in any scope changes even though this data createProjectForm.name is binded to (with ng-model) is only contained in the controller scope and the directive's scope containing the form (which is just being passed to the directive from the controller scope). I know it is related to the number of scopes (or directives) on the page because if I limit the ng-repeat from 25 items to 1, the filter is only called 9 times. This also happend for built-in filters (like json, and it even runs more times).
Is there something I might be doing wrong here or is this in fact how it should work in AngularJS?
BTW, I realize now that displaying the errors might be better off as a directive than a filter I am planning on going the directive route however I would like to clear up my understanding of filters here since I will probably run into this at some point down the road.
This has been addressed numerous times. All AngularJS expressions will be constantly re-evaluated throughout the lifecycle of the app. This is how two-way databinding in AngularJS works.
So, there's nothing wrong with your code. It's just that you need to make sure your filter is idempotent (returns the same output given the same input).
For more info take a look at Why Scope.$apply() calls $rootScope.$digest() rather than this.$digest()? and scope docs.
I have a control that should display breadcrumb navigation. It needs data (route & title) to display the navigation correctly. Data is taken from scope and used inside a directive.
What causes my problems is that I use a localization directive in the control that should translate the title. And this localization directive is called even when expression in ng-show is evaluated to false. Then the translation in localization directive ends with exception because it tries to translate incorrect string (see 'localize' directive in http://jsfiddle.net/F97wn/7/).
That seems quite weird. I would expect that if something sets whether the inner content should be visible or hidden, then it is evaluated first and then the inner content..
Ok, then I found that ng-show only sets some css attribute, so it's quite useless for me.
The question is: How should I solve the problem - what to use instead of the ng-show?
An example is at http://jsfiddle.net/F97wn/7/
You could use ngSwitch instead with the on part set to "toshow()" and the inner ng-switch-when="true" part to have your custom directive inside that area. This will then not execute the custom directive if the value of toshow is not true.
If the directive is throwing an exception, more information should probably be passed to the directive, in one of the following ways, so that the directive can decide if it has the required information to do what it needs to do:
attribute data -- e.g., localize="..." show-me="..."
something defined on the scope associated with ctrl -- e.g., $scope.showMe. The directive scope will have access to this property as scope.showMe, based on the way you currently have the directive defined.
or inject a service (that has the data) into the directive -- e.g., directive('localize', function(myShowMeService) { ... }
You might also want to look into <ng-if>. The ngIf directive removes and recreates a portion of the DOM tree (HTML) conditionally based on "falsy" and "truthy" values evaluated within an expression. It might be more intuitive than <ng-show> for your needs.
However, it is currently only available in the unstable version of AngularJS. If you can use that version of AngularJS you can find more information about it here.
I have the following line in my html:
<div ng-bind-html-unsafe="departmentConfig" class="control-group"></div>
and I use a $resource get to retrieve the HTML, assign the HTML to $scope.departmentConfig, and then the view is updated perfectly. The HTML that is assigned to $scope.departmentConfig contains form elements, with ng-model attributes in it, but when I change the values in these input elements, they don't update the $scope model at all.
This is what I have tried, based on a lot of other internet posts, and it isn't working:
$resource('resources/sources/departments/:mappedName', {
mappedName:departmentKey
}).get(function(departmentConfig) {
// This will call another function that will build a chunk of HTML
$scope.departmentConfig = $scope.buildDepartmentConfigHtml(departmentConfig);
// This is my feeble attempt to access the element, and bootstrap it to include the items in the $scope model.
var $departmentConfigContainer = $('#departmentConfig');
angular.bootstrap($departmentConfigContainer, ['sourcemanager']);
I have even seen some jsFiddle examples where this appears to be working, but mine isn't. Am I calling bootstrap too soon? I also tried putting a $watch on $scope.departmentConfig like this:
$scope.$watch('departmentConfig', function() {
var $departmentConfigContainer = $('#departmentConfig');
angular.bootstrap($departmentConfigContainer);
});
but it didn't work either. I bet there is an easy explanation to this, I just can't seem to get the input elements with ng-model that are loaded after page compile to get bound to the model. Any help is appreciated, this is the last piece of functionality I need to get working on my page. Let me know if you need more information about my configuration as well.
So, simply put, how can I force a section of the DOM to recompile after I know it has been loaded?
UPDATE
Here is a jsfiddle outlining what I would like to do: http://jsfiddle.net/j_snyder/ctyfg/. You will notice that property two and three don't update the model, and I am calling bootstrap on the outer div, hoping that will include those in the model binding. This is the first time I have posted to jsfiddle, please let me know if you can't see the example.
ng-bind-html is made for regular HTML, not compiling new angular elements.
You will have use the $compile service.
Here is how you would edit your current example to work: http://jsfiddle.net/andytjoslin/ctyfg/21/. But this way ends up being bad, because you have to do DOM manipulation in your controller.
You just need to create a directive that will basically do what you wanted ng-bind-html to do: http://jsfiddle.net/andytjoslin/ctyfg/22/