Default function parameter value in safari is not

问题:

I am using angularjs, and having problem with null assignment in safari only. Its working in chrome and firefox.

$scope.submit = function(id=null){
}

I am getting this error

SyntaxError: Expected token ')'

when I remove null, It just works. I don't know why !

$scope.submit = function(id){
}

Please help me to understand why this happening only with safari ?

回答1:

Default parameters from ES2015 are not yet supported in Safari. Please check the compatibility table.

At the moment the basic support provide Chrome 49 and Firefox 15.

---

But you can use the following ES5 code to achieve the same:

$scope.submit = function(id) {
  if (id === undefined) {
    id = null;
  }
}