angular.scope.$tryEval.html

<h1>angular.scope.$tryEval</h1>
<div class="angular-scope-tryeval"><fieldset class="workInProgress"><legend>Work in Progress</legend>
This page is currently being revised. It might be incomplete or contain inaccuracies.</fieldset>
<h2>Description</h2>
<div class="description"><p>Evaluates the expression in the context of the current scope just like
<a href="#!angular.scope.$eval()"><code>angular.scope.$eval()</code></a> with expression parameter, but also wraps it in a try/catch
block.</p>

<p>If exception is thrown then <code>exceptionHandler</code> is used to handle the exception.</p>

<h3>Example</h3><div ng:non-bindable><pre class="brush: js; html-script: true;">
         var scope = angular.scope();
         scope.error = function(){ throw 'myerror'; };
         scope.$exceptionHandler = function(e) {this.lastException = e; };

         expect(scope.$eval('error()'));
         expect(scope.lastException).toEqual('myerror');
         this.lastException = null;

         expect(scope.$eval('error()'),  function(e) {this.lastException = e; });
         expect(scope.lastException).toEqual('myerror');

         var body = angular.element(window.document.body);
         expect(scope.$eval('error()'), body);
         expect(body.attr('ng-exception')).toEqual('"myerror"');
         expect(body.hasClass('ng-exception')).toEqual(true);
       </pre></div></div>
<h2>Usage</h2>
<div class="usage"><div ng:non-bindable=""><pre class="brush: js; html-script: true;">angular.scope.$tryEval(expression[, exceptionHandler]);</pre>
</div>
<h3>Parameters</h3>
<ul class="parameters"><li><code ng:non-bindable="">expression – {string|function()} – </code>
<p>Angular expression to evaluate.</p></li>
<li><code ng:non-bindable="">exceptionHandler<i>(optional)</i> – {(function()|DOMElement)} – </code>
<p>Function to be called or DOMElement to be
decorated.</p></li>
</ul>
<h3>Returns</h3>
<div class="returns"><code ng:non-bindable="">{*}</code>
– <p>The result of <code>expression</code> evaluation.</p></div>
</div>
</div>