为什么ngPattern，ngMinvalue和其他验证指令仅适用于<input>

Question

I discovered that following Angular code doesn't work

<div ng-model="..." ng-pattern="...">

because Angular has the restriction

var ALIASED_ATTR = {
  'ngMinlength': 'minlength',
  'ngMaxlength': 'maxlength',
  'ngMin': 'min',
  'ngMax': 'max',
  'ngPattern': 'pattern'
};

function getAliasedAttrName(element, name) {
  var nodeName = element.nodeName;
  return (nodeName === 'INPUT' || nodeName === 'TEXTAREA') && ALIASED_ATTR[name];
}

The validators will work only with input and textarea but it will be convinied eg for solving the usecase and many others

<div contenteditable ngModel="...">

Why angular has the restriction?

Answer 1

It was a bug, the issue has been already fixed.

https://github.com/angular/angular.js/commit/43769fb676ae904852582a2c88a5523f0b9f58fc

https://github.com/angular/angular.js/pull/12658