SNOW-CAD User Interface Development Practice Question
Exhibit
Refer to the exhibit.
```javascript
// UI Policy Condition Script
function onCondition() {
return gs.getProperty('my.property') == 'true';
}
```A UI Policy with the above condition script never evaluates to true. What is the issue?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The script should not be wrapped in a function; it should directly be the condition expression.
UI Policy condition scripts are evaluated as expressions; they should directly return the condition result without being wrapped in a function. The script must be a single expression that evaluates to true or false. Option A is incorrect because UI16 does not require AngularJS for UI Policy conditions; UI Policy conditions are still evaluated as standard scripts. Option B is incorrect because there is no evidence of a misspelling, and property names can contain dots. Option C is incorrect because gs.getProperty() is permitted and commonly used in UI Policy scripts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The condition must be written in AngularJS to work in UI16.
Why it's wrong here
UI Policies do not use AngularJS.
- ✗
The property name is misspelled as 'my.property' but should be 'my_property'.
Why it's wrong here
There is no indication of a misspelling; the property may exist.
- ✗
gs.getProperty() is not permitted in UI Policy scripts.
Why it's wrong here
UI Policy scripts run server-side and can use gs.
- ✓
The script should not be wrapped in a function; it should directly be the condition expression.
Why this is correct
UI Policy condition scripts are evaluated as the script itself, not a function call.
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