Javascript 无效的速记属性初始值设定项
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Invalid shorthand property initializer
提问by Pallab Ganguly
I wrote the following code in JavaScript for a node project, but I ran into an error while testing a module. I'm not sure what the error means. Here's my code:
我在 JavaScript 中为节点项目编写了以下代码，但在测试模块时遇到错误。我不确定错误意味着什么。这是我的代码：
var http = require('http');
// makes an http request
var makeRequest = function(message) {
var options = {
host: 'localhost',
port = 8080,
path : '/',
method: 'POST'
}
// make request and execute function on recieveing response
var request = http.request(options, function(response) {
response.on('data', function(data) {
console.log(data);
});
});
request.write(message);
request.end();
}
module.exports = makeRequest;
When I try to run this module, it throws the following error:
当我尝试运行此模块时，它会引发以下错误：
$ node make_request.js
/home/pallab/Desktop/make_request.js:8
path = '/',
^^^^^^^^^^
SyntaxError: Invalid shorthand property initializer
at Object.exports.runInThisContext (vm.js:76:16)
at Module._compile (module.js:542:28)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:394:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:509:3
I dont quite get what this means, and what I can do to resolve this.
我不太明白这意味着什么，以及我能做些什么来解决这个问题。
回答by Diego Faria
Because its an object, the way to assign value to its properties is using :.
因为它是一个对象，所以为其属性赋值的方法是使用:.
Change the =to :to fix the error.
更改=为:以修复错误。
var options = {
host: 'localhost',
port: 8080,
path: '/',
method: 'POST'
}
回答by Nitin Nema
This error usually comes when you try to assign an object with Equal to(=) sign rather than colon (:)
当您尝试使用等于 (=) 符号而不是冒号 (:) 分配对象时，通常会出现此错误
The correct code should be like:-
正确的代码应该是这样的：-
var options = {
host: 'localhost',
port: 8080,
path: '/',
method: 'POST'
}
回答by r.jain
In options object you have used "=" sign to assign value to port but we have to use ":" to assign values to properties in object when using object literal to create an object i.e."{}" ,these curly brackets. Even when you use function expression or create an object inside object you have to use ":" sign. for e.g.:
在选项对象中，您使用“=”符号为端口赋值，但当使用对象字面量创建对象时，我们必须使用“:”为对象中的属性赋值，即“{}”，这些大括号。即使使用函数表达式或在对象内部创建对象，也必须使用“:”符号。例如：
var rishabh = {
class:"final year",
roll:123,
percent: function(marks1, marks2, marks3){
total = marks1 + marks2 + marks3;
this.percentage = total/3 }
};
john.percent(85,89,95);
console.log(rishabh.percentage);
here we have to use commas "," after each property. but you can use another style to create and initialize an object.
这里我们必须在每个属性后使用逗号“,”。但是您可以使用另一种样式来创建和初始化对象。
var john = new Object():
john.father = "raja"; //1st way to assign using dot operator
john["mother"] = "rani";// 2nd way to assign using brackets and key must be string
回答by akshay_sushir
Use :instead of =
使用:代替=
see the example below that gives an error
请参阅下面给出错误的示例
app.post('/mews', (req, res) => {
if (isValidMew(req.body)) {
// insert into db
const mew = {
name = filter.clean(req.body.name.toString()),
content = filter.clean(req.body.content.toString()),
created: new Date()
};
That gives Syntex Error: invalid shorthand proprty initializer.
这给出了语法错误：无效的速记属性初始值设定项。
Then i replace =with :that's solve this error.
然后我替换=为:解决此错误。
app.post('/mews', (req, res) => {
if (isValidMew(req.body)) {
// insert into db
const mew = {
name: filter.clean(req.body.name.toString()),
content: filter.clean(req.body.content.toString()),
created: new Date()
};
