[Vuejs]-How to pass argument in this demo of vuejs?

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✅

Variable names can’t have a period . in them, see JavaScript variable naming conventions: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Variables

All you have to do is change the name of the argument variable in your function. It does not have to match the name from your HTML view:

setSelectedItem(passedInArgument) {
  this.selected = passedInArgument;
}

passedInArgument will be evaluated to whatever item.message was in your view.

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You pass an argument to a function in the form of ‘item.message’ but in the same function read passed argument ex like this:

setSelectedItem(item){
  this.selected = item;
}