4a2fb86b1e
Improves the failure messages for the `template-var-assignment` schematic. After manual testing of the schematic it's not quite clear for developers what the failure message means without any context. The schematic now also references a short markdown file mentioning what needs to be changed, but eventually this document needs to be expanded with more information and context of the reasoning behind this change within Ivy. PR Close #29708
814 B
814 B
Assignments to template variables
With Ivy, assignments to template variables are no longer supported as template variables are effectively constants.
This means that assignments to template variables will break your application once Ivy is enabled by default. For example:
<button *ngFor="let option of options"
(click)="option = 'newButtonText'">
{{ option }}
</button>
In the example from above, a value is assigned to the option
template variable on click. This will ultimately break your
application and therefore the logic needs to be adjusted to not
update the option variable, but rather the given element in
the options array:
<button *ngFor="let option of options; let idx = index"
(click)="options[idx] = 'newButtonText'">
{{ option }}
</button>