break在angular forEach中是不可能实现的，我们需要修改forEach来实现。

$scope.myuser = [{name: "Ravi"}, {name: "Bhushan"}, {name: "Thakur"}];  
                angular.forEach($scope.myuser, function(name){
                  if(name == "Bhushan") {
                    alert(name);
                    return forEach.break(); 
                    //break() is a function that returns an immutable object,e.g. an empty string
                  }
                });

如果你将jQuery(而不是jqLite)与AngularJS结合使用，你可以使用$进行迭代。Each -允许根据布尔返回值表达式中断和继续。

JSFiddle:

http://jsfiddle.net/JEcD2/1/

Javascript:

var array = ['foo', 'bar', 'yay'];
$.each(array, function(index, element){
    if (element === 'foo') {
        return true; // continue
    }
    console.log(this);
    if (element === 'bar') {
        return false; // break
    }
});

注意:

虽然使用jQuery还不错，但都是原生数组。some或Array。每个函数都是MDN推荐的，你可以在原生forEach文档中阅读:

“没有办法停止或打破forEach循环。解决方案是使用Array。every或Array.some"

MDN提供了以下例子:

Array.some:

function isBigEnough(element, index, array){
    return (element >= 10);
}
var passed = [2, 5, 8, 1, 4].some(isBigEnough);
// passed is false
passed = [12, 5, 8, 1, 4].some(isBigEnough);
// passed is true

Array.every:

function isBigEnough(element, index, array){
    return (element >= 10);
}
var passed = [12, 5, 8, 130, 44].every(isBigEnough);
// passed is false
passed = [12, 54, 18, 130, 44].every(isBigEnough);
// passed is true

请使用ForEach的一些或所有实例，

Array.prototype.some:
some is much the same as forEach but it break when the callback returns true

Array.prototype.every:
every is almost identical to some except it's expecting false to break the loop.

例如:

var ary = ["JavaScript", "Java", "CoffeeScript", "TypeScript"];

ary.some(function (value, index, _ary) {
    console.log(index + ": " + value);
    return value === "JavaScript";
});

每个的例子:

var ary = ["JavaScript", "Java", "CoffeeScript", "TypeScript"];

ary.every(function(value, index, _ary) {
    console.log(index + ": " + value);
    return value.indexOf("Script") > -1;
});

查找更多信息 http://www.jsnoob.com/2013/11/26/how-to-break-the-foreach/

onSelectionChanged(event) {
    let selectdata = event['api']['immutableService']['gridOptionsWrapper']['gridOptions']['rowData'];
    let selected_flag = 0;

    selectdata.forEach(data => {
      if (data.selected == true) {
        selected_flag = 1;
      }
    });

    if (selected_flag == 1) {
      this.showForms = true;
    } else {
      this.showForms = false;
    }
}

break在angular forEach中是不可能实现的，我们需要修改forEach来实现。

$scope.myuser = [{name: "Ravi"}, {name: "Bhushan"}, {name: "Thakur"}];  
                angular.forEach($scope.myuser, function(name){
                  if(name == "Bhushan") {
                    alert(name);
                    return forEach.break(); 
                    //break() is a function that returns an immutable object,e.g. an empty string
                  }
                });

使用Array Some方法

 var exists = [0,1,2].some(function(count){
      return count == 1
 });

Exists将返回true，您可以将其用作函数中的变量

if(exists){
    console.log('this is true!')
}

数组一些方法- Javascript