AUR0704
Template compilation error: Invalid command "yyyy" for <let>. Only to-view/bind supported.
Error message
Template compilation error: Invalid command "{{0:.command}}" for <let>. Only to-view/bind supported.
Parameters
command: The invalid binding command used (e.g.,one-time,two-way,trigger).
Error explanation
This error occurs when the template compiler finds an unsupported binding command on an attribute of a <let> element. The <let> element is designed for creating variables within a template scope, and it only supports .bind (for simple assignment or expression evaluation) or no command (which defaults to .to-view / one-way binding). Other commands like .one-time, .two-way, .trigger, .capture, .call, etc., are not applicable to <let> elements.
Common causes
Using
.one-time,.from-view,.two-way,.trigger,.capture,.delegate, or.callon an attribute of a<let>element.
How to fix
Remove the unsupported binding command from the
<let>element's attribute.Use
.bindif you need to evaluate an expression.Use no binding command for simple one-way binding (
.to-view).
Example of Incorrect Usage:
<!-- Error: .two-way is not supported on <let> -->
<let my-var.two-way="someValue"></let>
<!-- Error: .trigger is not supported on <let> -->
<let click-handler.trigger="doSomething()"></let>
<!-- Error: .one-time is not supported on <let> -->
<let config.one-time="initialConfig"></let>Example of Correct Usage:
<!-- Using .bind (or default .to-view) -->
<let my-var.bind="someExpression"></let>
<let another-var="someStaticValue"></let>
<let user-name.bind="user.profile.name"></let>Last updated
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