Fix – Property assignment expected. ts(1136)
The error “error TS1136: Property assignment expected.” In typescript and Javascript occurs for various reason. In this ts tutorial, we will see why the error occurs and how to solve it in VSCODE. The error mainly occurs when you have an already existing babel project and you try to transition it to Typescript . The compiler will throw an error in reference to object destructuring codes like var user = {...this.props.userName}; and you might think the syntax of object destructuring in JS is different from typescript if the code previously work in babel. But the syntax is the same just that with TS you have to use an interface to define your state.
Please enable JavaScript
With the interface already defined, we can move ahead and check the properties and emit some values.
error message: at <div , I got “Property assignment expected.ts(1136)” at className, I got 2 errors Unreachable code detected.ts(7027) ‘;’ expected.ts(1005)
The Solution, is to simply surround the return statement with a parenthesis instead of curry-braces as we have done below.
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Property assignment expected. ts(1136)
I am following book Learning React, chapter 13 page 158, to first create-react-app helloworld and create HelloWorld.js
error message: at <div , I got “Property assignment expected.ts(1136)” at className, I got 2 errors Unreachable code detected.ts(7027) ‘;’ expected.ts(1005)
package.json { “name”: “helloworld”, “version”: “0.1.0”, “private”: true, “dependencies”: { “ @testing-library /jest-dom”: “^4.2.4”, “ @testing-library /react”: “^9.5.0”, “ @testing-library /user-event”: “^7.2.1”, “react”: “^16.14.0”, “react-dom”: “^16.14.0”, “react-scripts”: “3.4.3” }, “scripts”: { “start”: “react-scripts start”, “build”: “react-scripts build”, “test”: “react-scripts test”, “eject”: “react-scripts eject” }, “eslintConfig”: { “extends”: “react-app” }, “browserslist”: { “production”: [ “>0.2%”, “not dead”, “not op_mini all” ], “development”: [ “last 1 chrome version”, “last 1 firefox version”, “last 1 safari version” ] } }
I am using visual studio code Version: 1.50.0 Commit: 93c2f0fbf16c5a4b10e4d5f89737d9c2c25488a3 Date: 2020-10-07T06:01:33.073Z Electron: 9.2.1 Chrome: 83.0.4103.122 Node.js: 12.14.1 V8: 8.3.110.13-electron.0 OS: Linux x64 5.4.0-51-generic
Can you help? Thanks!
Hi. Your jsx (html) should be wrapped by parens ( () ) or nothing at all, not curly braces ( {} ). I think that’s what is causing the error.
Thanks a lot. That is it.
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Typescript Object destructuring results in "Property assignment expected."
I am transitioning a project from Babel to Typescript and receive the following compiler error:
from code that looks like this:
This code previously worked fine under Babel, but causes the error above when attempting to compile via Typescript. Is object destructuring different in Typescript?
- ecmascript-2016
- destructuring
- 2 shouldn't it be var { auth } = this.props; ? – Icepickle Jan 19, 2016 at 15:22
- 1 Isn't this ES7 syntax? – MinusFour Jan 19, 2016 at 15:27
The feature you are looking for is Object spread/rest operators (proposed for ES7). It looks like it's planned but not yet implemented:
We want to wait for the proposal to reach Stage 3 before addressing this.
More info here .
Edit : The proposal is in stage-3. We'll likely see it drafted on ES2018 (ES9). Support has been added to TypeScript as well (starting from 2.1).
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[Solved]-Why am I getting an error that says Property assignment expected when I'm not even using TypeScript?-React Native
In component screen jsx uses return statment in parantheses rather than curly braces {} .
So just replace this :
Hope it helps. feel free for doubts
this will return an object. You should return an JSX.Element instead.
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ES2017 Object rest spread yields "Property assignment expected" validation error when used in JS embedded in HTML #19629
ronjouch commented Jan 31, 2017 • edited
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'Property assignment expected' when using Object.entries
Hello, I'm having a hard time finding any answers on SO and hoping someone might be able to help me with this. I'm building a Next.JS app. My component is pulling in props as an array of objects. Inside useEffect I'm using Object.entries to iterate through key value pairs in my props object and running that value through a fetch function. What I'd like to do is append each response to the corresponding object inside my props array, but I'm getting TS error 'Property assignment expected' in VSCode, and 'Unexpected token' error in the browser. My code: useEffect(async () => { for (const [key, { address }] of Object.entries(props.artWorks)) { await fetch( \ https://api.mapbox.com/geocoding/v5/mapbox.places/${address}.json?limit=2&access_token=${process.env.MAPBOX_KEY}` ) .then((response) => response.json()) .then((result) => { return setLocaleState({ ...props.artWorks, `${key}`: result.features[0].center }) }) } }, [])`
The error is occurring at setState, \ ${key}` If I remove the template literal the function works, assigning a new array, 'key' to my props object and rewriting it on each iteration, as I expect it would. Obviously, this is not what I'm after, I'm trying to append each response to the corresponding object inside artWorks` I hope that's all clear. Been stuck on this for a couple days, any help would be greatly appreciate. Thank you!
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About Typescript
Typescript(JS) is a strongly typed programming language that builds on JavaScript, developed and maintained by Microsoft.
Key Features
- Superset of Javascript
- Strong static typing
- supports OOPS
- Language extension to ECMAScript 6 with other features like Type annotations and compile-time type checking, Type inference and Type erasure, Interfaces, Enumerated types, Generics, Namespaces, Tuples
- .ts extension
Syntax help
Variable declaration.
IF is used to execute a block of code based on a condition.
2. If-Else:
Else part is used to execute the block of code when the condition fails.
Switch is used to replace nested If-Else statements.
For loop is used to iterate a set of statements based on a condition.
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
6. Do-While
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
Arrow functions
Arrow Functions helps developers to write code in concise way, it’s introduced in ES6. Arrow functions can be written in multiple ways. Below are couple of ways to use arrow function but it can be written in many other ways as well.
Function Overloading
Typescript provides function overloading where multiple functions with the same name but different parameter types and return type is possible. But, the number of parameters should be the same.
使用装饰器可能会提示 Property assignment expected.Vetur(1136)
因为使用eslint进行代码格式检查，所以可以关闭vetur验证script的能力，请在vscode settings里面添加下面代码
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js在动态定义的新对象中，属性为变量时，如何动态定义
( property ) aqiType : { 2 : string ; 3 : string ; 4 : string ; 5 : string ; 6 : string ; 7 : string ; }
Parsing error: Unexpected token [eslint
报错如上。但如果要动态读取aqiType的属性，肯定只能这样写。故尝试修改如下：
但对象中颜色不一样，显然不行。故又尝试如下：
错误：Property assignment expected.ts(1136)
经过多方查找，发现要这样才对：
总结：新对象中动态定义的属性，需要用方括号把变量值包裹起来。
IMAGES
VIDEO
COMMENTS
The error “error TS1136: Property assignment expected.” In typescript and Javascript occurs for various reason. In this ts tutorial, we will see why the
Property assignment expected. ts(1136) ; wangpjy October 17, 2020, 2:59am #1 ; senocular October 17, 2020, 9:25am #2 ; wangpjy October 18, 2020, 1:38am #3.
error TS1136: Property assignment expected. from code that looks like this: var auth = {...this.props.
In component screen jsx uses return
ES2017 Object rest spread yields "Property assignment expected" validation error when used in JS embedded in HTML #19629.
What I'd like to do is append each response to the corresponding object inside my props array, but I'm getting TS error 'Property assignment
script.ts(31,54): error TS1136: Property assignment expected. script.ts(31,70): error TS1128: Declaration or statement expected. script
使用装饰器可能会提示Property assignment expected.Vetur(1136)因为使用eslint进行代码格式检查，所以可以关闭vetur验证script的能力，
1120, 错误, An export assignment cannot have modifiers. ... 1136, 错误, Property assignment expected.
错误：Property assignment expected.ts(1136). 经过多方查找，发现要这样才对：. 或者：. 总结：新对象中动态定义的属性，需要用方括号把变量值包裹
typescript-eslint1.1mMIT5.54.1TS vulns 0 vulnerabilities. ESLint plugin that wraps a TSLint configuration and lints the whole source using TSLint.