What is the difference between the following codes
以下代码有什么不同
function Ctrl($scope) {
$scope.$watch(function() {
return this.variable;
}.bind(this), /*...*/);
}
and
和
function Ctrl($scope) {
$scope.$watch(angular.bind(this, function() {
return this.variable;
}, /*...*/);
}
for me are the same but is there any advantage of using angular.bind?
对我来说是一样的，但是使用盎格鲁-绑定有什么好处吗?
1 个解决方案
#1
2
The built-in Function.prototype.bind function does not exist in older browsers, such as IE 8. However, the same syntax can be achieved by using a polyfill. This is essentially what Angular is doing internally.
内置Function.prototype。绑定函数在旧的浏览器中不存在，比如ie8。但是，使用polyfill可以实现相同的语法。这就是角在内部的作用。
The angular.bind function does not use Function.prototype.bind, so it may be possible to use it in older browsers. Of course, this point is moot if you are using a version of Angular that does not actively support those older browsers.
角。绑定函数不使用function .prototype。绑定，所以在旧的浏览器中使用它是可能的。当然，如果您使用的是不积极支持旧浏览器的角度版本，那么这一点毫无意义。
#1
2
The built-in Function.prototype.bind function does not exist in older browsers, such as IE 8. However, the same syntax can be achieved by using a polyfill. This is essentially what Angular is doing internally.
内置Function.prototype。绑定函数在旧的浏览器中不存在，比如ie8。但是，使用polyfill可以实现相同的语法。这就是角在内部的作用。
The angular.bind function does not use Function.prototype.bind, so it may be possible to use it in older browsers. Of course, this point is moot if you are using a version of Angular that does not actively support those older browsers.
角。绑定函数不使用function .prototype。绑定，所以在旧的浏览器中使用它是可能的。当然，如果您使用的是不积极支持旧浏览器的角度版本，那么这一点毫无意义。