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fix 109: trim spaces to fix one-time expression detection #122
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@OACDesigns, thanks for fixing this. Could you also add a test for the fix in test/scopes.spec.js? |
gkalpak
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Previously, one-time expressions were supposed to not trigger perf timers. There were a couple of issues with the implementation: 1. One-time expressions were not detected as such if there was whitespace before the `::`. 2. It depended on internal AngularJS implementation details in a way that would fail to identify certain usecases (e.g. multiple interpolations in a single attribute value or node text). 3. Time spent on the initial evaluation of the one-time expressions would not be accounted for, but could still impact the duration of the first `$digest`. 4. While it is not common, there are cases were one-time expressions don't settle immediately. In such cases, their impact on the `$digest` should not be ignored. This commit fixes the above issues by ensuring that only the "final" call to `$watch` is intercepted (in contrast to intermediate calls that might call a `$$watchDelegate`, which will then create the actual `$watch`er). One-time expressions are intercepted normally and stop triggering perf times as soon as their `unwatch` function is called. Although the dependency on internal AngularJS implementation details could not be avoided, the new implementation is a little more robust, as it relies on fewer and less brittle details :D Fixes angular#109 Closes angular#122
gkalpak
added a commit
that referenced
this pull request
Mar 30, 2017
Previously, one-time expressions were supposed to not trigger perf timers. There were a couple of issues with the implementation: 1. One-time expressions were not detected as such if there was whitespace before the `::`. 2. It depended on internal AngularJS implementation details in a way that would fail to identify certain usecases (e.g. multiple interpolations in a single attribute value or node text). 3. Time spent on the initial evaluation of the one-time expressions would not be accounted for, but could still impact the duration of the first `$digest`. 4. While it is not common, there are cases were one-time expressions don't settle immediately. In such cases, their impact on the `$digest` should not be ignored. This commit fixes the above issues by ensuring that only the "final" call to `$watch` is intercepted (in contrast to intermediate calls that might call a `$$watchDelegate`, which will then create the actual `$watch`er). One-time expressions are intercepted normally and stop triggering perf times as soon as their `unwatch` function is called. Although the dependency on internal AngularJS implementation details could not be avoided, the new implementation is a little more robust, as it relies on fewer and less brittle details :D Fixes #109 Closes #122 Closes #124
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this fixes #109 allowing for both
{{ ::and{{::which are valid syntax for one-time bindings.The same is done in Angular 1.5.8 when detecting one-time binding in string expressions.