1. 解释“object is not extensible”的含义 在JavaScript中,对象的可扩展性(extensible)指的是一个对象是否可以被添加新的属性。如果一个对象被设置为不可扩展(non-extensible),那么任何尝试向该对象添加新属性的操作都会失败,并抛出错误。具体来说,“object is not extensible”意味着该对象已经被设置为不可扩展状...
为了避免一些错误,react内部冻结了元素的很多内容,意思就是让你尽量使用setState来更改数据。 执行open方法时,boxOpenStyle还没冻结,close的时候元素创建完成,对象已经被冻结,再更改属性抛出错误 原因: React除了不建议props对象作为可修改对象外,还不建议把传给style属性的对象作为可修改对象。并且从React 16开始也把冻...
二:报错React : cannot add property 'X', object is not extensible 这提示该对象不能直接添加属性 ‘X’, 需要进行解构后才可以,可以是使用 JSON.parse(JSON.stringify(obj)),或者 Object.assgin({}, obj)
class PublicScreen extends React.Component { constructor(props) { super(props); this.getStyle = this.getStyle.bind(this); } getStyle() { const { width = 1920, height = 1080 } = this.props.style || {}; const root = document.querySelector('#root'); const per = root.clientWidth / w...
I am currently trying to implement an isomorphic react component in my node.js + express build. However, when I try to include the said component into my jade template to render it, I get this error:TypeError: Can't add property context, object is not extensible ...
当我在项目中使用 react-ajax 时,会报这个错误。这要如何解决? google 了一些资料,有些说是版本的问题。我用的react是0.14。 Activity yuanyan commented on Jan 18, 2016 yuanyan on Jan 18, 2016 Owner 版本的问题,当前还未兼容0.14,会在不久后兼容 Sign up for free to join this conversation on Git...
Check if updating to the latest Preact version resolves the issue Describe the bug In a big application we switched from CRA to preact with vite. The app runs fine and now I want to fix the unit tests. However, I keep getting the error m...
问浏览器错误显示“无法添加属性*，对象不可扩展”-即使属性确实存在于类定义中EN版权声明：本文内容由...
1. Re:react-native布局中的层级问题(zIndex,elevation) 111 --SunshineFF 2. Re:js练习- 给你一个对象,求有几层 这道题可以用广度优先遍历^_^ function testLevel(param, deep = 0) { if (Object.keys(param || {}).length 0) return ... --xfeer 3. Re:react-native android/ios 手动/自动...
// or the object is not extensible. // // Returns true on success. V8_WARN_UNUSED_RESULT Maybe<bool> CreateDataProperty(Local<Context> context, Local<Name> key, Local<Value> value); V8_WARN_UNUSED_RESULT Maybe<bool> CreateDataProperty(Local<Context> context, ...