Angular.noop 用于什么? [英] What is Angular.noop used for?

问题描述

即使在 Angular.org 文档中，我也尝试在任何地方搜索它，但找不到任何详细的实现说明.如果有人能解释一下，那将是非常有帮助的.

I have tried searching it everywhere even on Angular.org documentation but couldn't find any detailed explanation with implementation. It would be hugely helpful if any could explain it.

推荐答案

angular.noop 是一个空函数，当您需要将某个函数作为参数传递时，它可以用作占位符.

angular.noop is an empty function that can be used as a placeholder when you need to pass some function as a param.

function foo (callback) {
    // Do a lot of complex things

    callback();
}

// Those two have the same effect, but the later is more elegant
foo(function() {});
foo(angular.noop);

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