Challenges arise when employing angular scope functions in the context of the DOM (html)

Question

Challenges arise when employing angular scope functions in the context of the DOM (html)

UPDATE: Encountered an issue caused by attempting to iterate over a function's return value using ng-repeat \ ng-options, rather than converting the data into a regular object through a promise.

Here is the code snippet:

 $scope.layout.getPartialUriSafe = function(){
       return $sceDelegate.getTrusted($sce.RESOURCE_URL, $scope.layout.getPartialUri());
    }

$scope.layout.getPartialUri = function(){
    var cat = $location.search().cat;
    switch(cat){
        case 'settings':
            return 'partials/companySettings.html';
        case 'scouters':
            $scope.model.roleType = 'scouter';
            $scope.layout.roleTitle = $filter('translate')('SCOUTERS');
            return 'partials/roles.html';
        case 'recruiters':
            $scope.model.roleType = 'recruiter';
            $scope.layout.roleTitle = $filter('translate')('RECRUITERS');
            return 'partials/roles.html';
        case 'social':
            return 'partials/socialLinks.html';
        case 'design':
            return 'partials/companyDesign.html';
        default:
            return 'partials/companySettings.html';
    }
}

HTML:

<div class="settingsInnerContainer">
    <div data-ng-include data-src="layout.getPartialUriSafe()"></div>
</div>

The above scenario results in the screen freezing without any error messages displayed.

I attempted using interpolated values like so:

 '{{layout.getPartialUriSafe()}}'

However, this resulted in an angular parser error.

I also tried using primitive interpolation with no success:

'{{layout.getPartialUriSafePrimitive}}'

where layout.getPartialUriSafePrimitive contains a string representation of the partial URI.

Thank you in advance for any assistance provided. I've been working on upgrading to ng 1.2.x and have encountered several issues that were resolved in 1.2.2, but this particular challenge remains unresolved.

javascript angularjs angularjs-ng-include

Answer 1

Answer №1

Hey there, just a heads up about an API adjustment (in lowercase letters unfortunately). Make sure to review the documentation for version 1.1.5 regarding $location.search() and also for the latest version - 1.2.x. (Puzzle: can you pinpoint the discrepancy?)

search(search, paramValue)

In 1.1.5, the search parameter is optional, while in 1.2.x it is NOT! So give this a try:

var cat = $location.search("cat");

Alternatively, if you don't mind adding the dependency to $routeParams (it doesn't involve a function call, potentially offering better performance - by a few nanoseconds :-)

var cat = $routeParams.cat;

Answer 2

Hey there, just a heads up about an API adjustment (in lowercase letters unfortunately). Make sure to review the documentation for version 1.1.5 regarding $location.search() and also for the latest version - 1.2.x. (Puzzle: can you pinpoint the discrepancy?)

search(search, paramValue)

In 1.1.5, the search parameter is optional, while in 1.2.x it is NOT! So give this a try:

var cat = $location.search("cat");

Alternatively, if you don't mind adding the dependency to $routeParams (it doesn't involve a function call, potentially offering better performance - by a few nanoseconds :-)

var cat = $routeParams.cat;

Answer 3

Answer №2

I wanted to share my insights on resolving migration challenges from version 1.0.x to 1.2.x that many developers encounter:

The issue I faced was trying to iterate over a function return value using ng-options, which contained logic within it. Angular did not handle this well.

Unlike traditional MVC frameworks, Angular utilizes dirty checking instead of functions to update the DOM. Rendering or iterating over a function in your partials can be risky, and in newer versions of Angular, it can potentially freeze your application.

In my 'companySettings.html' file, I had something like this:

<select name="industry" class="filedExpand" data-ng-model="model.formData.industry" data-ng-options="industry.id as industry.name for industry in model.industries()" data-ng-required="true">
    <option value=''>{{'INDUSTY' | translate}}</option>
</select>

The corresponding function in the controller was:

$scope.model.industries = function(){
    if($scope.model.industryList){
        return $scope.model.industryList;
    }

    regService.getIndustries().then(function(data){
        $scope.model.industryList = data.data;
        return data.data;
    },
    function(data){
        console.log('error fetching industries');
    });
}

I made the following changes:

<select name="industry" class="filedExpand" data-ng-model="model.formData.industry" data-ng-options="industry.id as industry.name for industry in model.__industries" data-ng-required="true">
    <option value=''>{{'INDUSTY' | translate}}</option>
</select>

Controller:

$scope.model.getIndustries = function(){
    var deferred = $q.defer();
    var industries = regService.getIndustries();
    if(industries){
        deferred.resolve(industries);
        return deferred.promise;
    }

    regService.loadIndustries().then(function(data){
        regService.setIndustries(data.data);
        deferred.resolve(data.data);
    },
    function(data){
        deferred.resolve([]);
        regService.setIndustries([]);
    });
    return deferred.promise;
}

$scope.model.getIndustries().then(function(data){
    $scope.model.__industries = data;
});

Answer 4

I wanted to share my insights on resolving migration challenges from version 1.0.x to 1.2.x that many developers encounter:

The issue I faced was trying to iterate over a function return value using ng-options, which contained logic within it. Angular did not handle this well.

Unlike traditional MVC frameworks, Angular utilizes dirty checking instead of functions to update the DOM. Rendering or iterating over a function in your partials can be risky, and in newer versions of Angular, it can potentially freeze your application.

In my 'companySettings.html' file, I had something like this:

<select name="industry" class="filedExpand" data-ng-model="model.formData.industry" data-ng-options="industry.id as industry.name for industry in model.industries()" data-ng-required="true">
    <option value=''>{{'INDUSTY' | translate}}</option>
</select>

The corresponding function in the controller was:

$scope.model.industries = function(){
    if($scope.model.industryList){
        return $scope.model.industryList;
    }

    regService.getIndustries().then(function(data){
        $scope.model.industryList = data.data;
        return data.data;
    },
    function(data){
        console.log('error fetching industries');
    });
}

I made the following changes:

<select name="industry" class="filedExpand" data-ng-model="model.formData.industry" data-ng-options="industry.id as industry.name for industry in model.__industries" data-ng-required="true">
    <option value=''>{{'INDUSTY' | translate}}</option>
</select>

Controller:

$scope.model.getIndustries = function(){
    var deferred = $q.defer();
    var industries = regService.getIndustries();
    if(industries){
        deferred.resolve(industries);
        return deferred.promise;
    }

    regService.loadIndustries().then(function(data){
        regService.setIndustries(data.data);
        deferred.resolve(data.data);
    },
    function(data){
        deferred.resolve([]);
        regService.setIndustries([]);
    });
    return deferred.promise;
}

$scope.model.getIndustries().then(function(data){
    $scope.model.__industries = data;
});

Challenges arise when employing angular scope functions in the context of the DOM (html)

Answer №1

Answer №2

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