How to solve out the $event issue in angular application when I'm using and Angular Material and some code customizing it

user_13639303 0
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I found an issue in Angular 6 version with that using Angular Material. Anybody can help me to fixed this error of $event.

 ERROR Error: Cannot assign value "$event" to template variable "nameValue". Template variables are read-only.
at _AstToIrVisitor.push../node_modules/@angular/compiler/fesm5/compiler.js._AstToIrVisitor.visitPropertyWrite (compiler.js:8719)
at PropertyWrite.push../node_modules/@angular/compiler/fesm5/compiler.js.PropertyWrite.visit (compiler.js:7589)
at convertActionBinding (compiler.js:8320)
at prepareEventListenerParameters (compiler.js:17473)
at Object.params (compiler.js:18598)
at compiler.js:18369
at Array.map (<anonymous>)
at compiler.js:18369
at compiler.js:17630
at Array.map (<anonymous>)

I didn't use any template variable. I put it directly in the Html.

Unhandled Promise rejection: Cannot assign value "$event" to template variable "nameValue". Template variables are read-only. ; Zone: <root> ; Task: Promise.then ; Value: Error: Cannot assign value "$event" to template variable "nameValue". Template variables are read-only.
    at _AstToIrVisitor.push../node_modules/@angular/compiler/fesm5/compiler.js._AstToIrVisitor.visitPropertyWrite (compiler.js:8719)
    at PropertyWrite.push../node_modules/@angular/compiler/fesm5/compiler.js.PropertyWrite.visit (compiler.js:7589)
    at convertActionBinding (compiler.js:8320)
    at prepareEventListenerParameters (compiler.js:17473)
    at Object.params (compiler.js:18598)
    at compiler.js:18369
    at Array.map (<anonymous>)
    at compiler.js:18369
    at compiler.js:17630
    at Array.map (<anonymous>) Error: Cannot assign value "$event" to template variable "nameValue". Template variables are read-only.
    at _AstToIrVisitor.push../node_modules/@angular/compiler/fesm5/compiler.js._AstToIrVisitor.visitPropertyWrite (http://localhost:4200/vendor.js:39190:27)
    at PropertyWrite.push../node_modules/@angular/compiler/fesm5/compiler.js.PropertyWrite.visit (http://localhost:4200/vendor.js:38060:24)
    at convertActionBinding (http://localhost:4200/vendor.js:38791:45)
    at prepareEventListenerParameters (http://localhost:4200/vendor.js:47944:23)
    at Object.params (http://localhost:4200/vendor.js:49069:20)
    at http://localhost:4200/vendor.js:48840:90
    at Array.map (<anonymous>)
    at http://localhost:4200/vendor.js:48840:56
    at http://localhost:4200/vendor.js:48101:83
    at Array.map (<anonymous>)

Any solution for this

angularjs-directive angular-material angular multidimensional-array javascript
1 Answers

I had the same problem with Angular 9. I figured out that I had declared a variable like "let nameValue of values" and after I did [(item)]=nameValue on the Template. The problem was I had assigned item to nameValue with double-binding. Removing the () solved my problem

user_101909750
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