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docs(guide/expression): update diff list between JavaScript and Angular expressions

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add paragraphs about function declaration, comma and void operators and
RegExp to the diff list in the beginning of articule

Closes #10418
Closes #10452
This commit is contained in:
Aleksey Bobyr
2014-12-14 20:00:45 +02:00
committed by Peter Bacon Darwin
parent d161cc6b25
commit 24eb528b05
1 changed files with 13 additions and 5 deletions
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18
docs/content/guide/expression.ngdoc
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@@ -26,8 +26,16 @@ Angular expressions are like JavaScript expressions with the following differenc
* **Forgiving:** In JavaScript, trying to evaluate undefined properties generates `ReferenceError`
or `TypeError`. In Angular, expression evaluation is forgiving to `undefined` and `null`.
* **No Control Flow Statements:** you cannot use the following in an Angular expression:
* **No Control Flow Statements:** You cannot use the following in an Angular expression:
conditionals, loops, or exceptions.
* **No Function Declarations:** You cannot decleare functions in an Angular expression.
Even inside `ng-init` directive
* **No RegExp Creation With Literal Notation:** You cannot create regular expressions
in an Angular expression.
* **No Comma And Void Operators:** You cannot use `,` or `void` in an Angular expression.
* **Filters:** You can use {@link guide/filter filters} within expressions to format data before
displaying it.
@@ -164,11 +172,11 @@ expression. The reason behind this is core to the Angular philosophy that applic
be in controllers, not the views. If you need a real conditional, loop, or to throw from a view
expression, delegate to a JavaScript method instead.
## No RegExp creation with literal notation
## No function declarations or RegExp creation with literal notation
You can't create regular expressions from within AngularJS expressions. This is to avoid complex
model transformation logic inside templates. Such logic is better placed in a controller or in a dedicated
filter where it can be tested properly.
You can't declare functions or create regular expressions from within AngularJS expressions. This is
to avoid complex model transformation logic inside templates. Such logic is better placed in a
controller or in a dedicated filter where it can be tested properly.
## `$event`