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Angular2: Deep copy or angular.copy replacement in Angular2

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[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二04 | 时间 2016 | 作者 红领巾 ] 0人收藏点击收藏

As you are aware of fact Angular 1.x had angular.copy in order to deep copy arrays and objects. We need this so that I can copy the object and lose its reference, which means I create a new object with clean reference history (_proto is not polluted) . Otherwise simple assignment will be a shallow copy and any change in source object will be visible in target object.

Please see my previous post from stone-age:grinning: :

PREVENT CHANGES IN PARENT SCOPE UNTIL SAVE OPERATION IS PERFORMED IN MODAL

Solution:

Assume you are using ES5/ECMAScript 2015 then Use Object.assign() , this method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.

Syntax Object.assign(target, ...sources) Example let course = {
name: 'Database',
id: 7
};
let newCourse= Object.assign({}, course);
newCourse.name= 'Dataware';
console.log(course.name); // writes Database
console.log(newCourse.name); // writes Dataware

Use polyfill for older browser.

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