JavaScript 双冒号（绑定运算符）
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JavaScript double colon (bind operator)
提问by Victor Marchuk
As you know, there is a proposal for a shortcut for .bind()function, so you can write:
如您所知，有一个.bind()功能快捷方式的建议，因此您可以编写：
::this.handleStuff
and it will work like that in es5:
它会像在 es5 中那样工作：
this.handleStuff.bind(this)
My question is: will it be possible to pass arguments this way?
我的问题是：是否可以通过这种方式传递参数？
I mean a way of writing this with the aforementioned shortcut:
我的意思是用前面提到的快捷方式来写这个：
this.handleStuff.bind(this, 'stuff')
It's a pretty common pattern in React, so it would be nice to shorten it a little.
这是 React 中非常常见的模式，因此将其缩短一点会很好。
回答by Bergi
No. The bind operator(spec proposal) comes in two flavours:
Method extraction
::obj.method ≡ obj.method.bind(obj)"virtual method" calls
obj::function ≡ function.bind(obj) obj::function(…) ≡ function.call(obj, …)
方法提取
::obj.method ≡ obj.method.bind(obj)“虚拟方法”调用
obj::function ≡ function.bind(obj) obj::function(…) ≡ function.call(obj, …)
Neither of them feature partial application. For what you want, you should use an arrow function:
它们都没有部分应用功能。对于你想要的，你应该使用箭头函数：
(...args) => this.handleStuff('stuff', ...args) ≡ this.handleStuff.bind(this, 'stuff')
