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...
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开始也把冻结了(Object.freeze): if (propKey === STYLE) { if (__DEV__) { if (nextProp) { // Freeze the next style object so that we can assume it won't be // mutated. We have a...
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...
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)
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 ...
Footer © 2025 GitHub, Inc. Footer navigation Terms Privacy Security Status Docs Contact Manage cookies Do not share my personal information 使用时报错:Can't add property context, object is not extensible · Issue #1 · yuanyan/react-ajax...
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...
not extensible是react17之后才进行增加的。通过Object.freeze()将对象进行处理元素。 需要注意Object.freeze()是一层浅冻结,在react内部进行了递归Object.freeze()。 所以在react中元素本身是不可变的,当元素被创建后是无法修改的。只能通过重新创建一个新的元素来更新旧的元素。 你可以这样理解,在react中每一个...
props.value = '试试看!' 使用之后报错-> TypeError: Cannot add property value, object is not extensible 果然失败了,这里根据我对js的理解整个对象肯定是经过Object.freeze()的。看来直接修改或者替换都是行不通的,那么曲线救国,直接复制它呢?试试看吧。 const control = Object.assign({}, this.props....
错误为:TypeError: Cannot add property paths, object is not extensible // tsconfig.json { "extends": "./paths.json", "compilerOptions": { "target": "es5", "lib": ["dom", "dom.iterable", "esnext"], "allowJs": true, "skipLibCheck": true, "esModuleInterop": true, "allowSynthetic...