My app crashes every time it reaches this line:
const {name, price} = req.query;
^
can't seem to locate the exact answer..here is the error log
SyntaxError: Unexpected token {
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:140:18)
at node.js:1043:3
context:
app.get('/products/add' , (req, res) => {
const {name, price} = req.query;
const INSERT_PRODUCTS_QUERY = `INSERT INTO products (name, price) VALUES ('${ name }', ${ price })`;
connection.query(INSERT_PRODUCTS_QUERY, (err,results) => {
if(err)
{
return res.send(err);
}
else
{
return res.send('succesfully added product');
}
});
});
According to node.green, the object destructuring with primitives syntax works after Node.JS v6.4.0, and throws the Unexpected Token { on Node.js versions below that.
Also, the object rest/spread properties only works out of the box from Node v8.6.0. It works in v8.2.1 with the --harmony flag, and throws the Unexpected Token ... on Node.js versions below that.
You tried to use destructuring assignment. AFAIK its support by nodejs v.6+ from a box and from 4.2.2 with flag --harmony_destructuring
Related
I'm creating a very basic project with Nodejs for accessing SQL Server database. The steps I take are:
I create the folder for the app ang go into it
I execute "npm init -y"
I execute "npm install mssql"
I copy the short example of the documentation (changing the connetion string values) in index.js:
const sql = require('mssql');
async () => {
try {
await sql.connect('Server=localhost,1433;Database=database;User Id=username;Password=password;Encrypt=true');
const result = await sql.query("select * from mytable");
console.dir(result);
} catch (err) {
console.log(err);
}
};
I execute "node index.js"
Then I get the following error:
C:\Users\User\Desktop\project\app\node_modules\tedious\lib\connection.js:1448
const [, major, minor, build] = /^(\d+)\.(\d+)\.(\d+)/.exec(_package.version) ?? ['0.0.0', '0', '0', '0'];
^
SyntaxError: Unexpected token '?'
at wrapSafe (internal/modules/cjs/loader.js:915:16)
at Module._compile (internal/modules/cjs/loader.js:963:27)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
at Module.load (internal/modules/cjs/loader.js:863:32)
at Function.Module._load (internal/modules/cjs/loader.js:708:14)
at Module.require (internal/modules/cjs/loader.js:887:19)
at require (internal/modules/cjs/helpers.js:74:18)
at Object.<anonymous> (C:\Users\User\Desktop\project\app\node_modules\tedious\lib\tedious.js:59:42)
at Module._compile (internal/modules/cjs/loader.js:999:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
What can I do for fixing that and be able to execute the code?
I am trying to use bcrypt to compare user's password with stored password.
But Express is giving error is I use await before bcrypt.compare
Here is the code :
app.post ('/users/login', (req, res) => {
const user = users.find(user=> user.name === req.body.user)
if (user == null) {
return res.status(400).send('Can Not find user');
} else {
try{
if ( await bcrypt.compare(req.body.password, user.password)) {
res.send("Success");
} else {
res.send("Incorrect PAssword");
}
} catch {
return res.status(500).send('Some Error has occurred');
}
}
});
I am getting this error :
C:\Data\Ashish\projects\jwtAuthentication\app.js:32
if ( await bcrypt.compare(req.body.password, user.password)) {
^^^^^^
SyntaxError: Unexpected identifier
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
[nodemon] app crashed - waiting for file changes before starting...
Please help to find the mistake..
Regards,
Ashish
You forgot to add async to the callback function.
app.post ('/users/login', (req, res) => {
Should be:
app.post ('/users/login', async (req, res) => {
Await will work only with async functions.
It is different from the chrome console. In the console you can directly use await keyword, but in case of node.js, you need to specify async nature of the parent function in which you want to use await.
For further reference, you can refer to this link.
const Discord = require('discord.js');
const bot = new Discord.Client();
let cofig = require('./botconfig.json');
let token = config.token;
let prefix = config.prefix;
bot.on('ready', () => {
console.log(`Запустился бот ${bot.user.username}`);
});
bot.on('message', msg => {
if (msg.content === 'ping') {
msg.reply('Pong!');
}
});
bot.login(token);`
My bot is supposed to answer by Pong! when I type the ping in a channel. It's a simple ping test to check if the bot is alive and behave correctly. However I have an error when I try to make it work.
Error:
SyntaxError: C:\Users\mrakp\OneDrive\Рабочийстол\mamapapads\botconfig.json: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at Object.Module._extensions..json (internal/modules/cjs/loader.js:801:27)
at Module.load (internal/modules/cjs/loader.js:643:32)
at Function.Module._load (internal/modules/cjs/loader.js:556:12)
at Module.require (internal/modules/cjs/loader.js:683:19)
at require (internal/modules/cjs/helpers.js:16:16)
at Object.<anonymous> (C:\Users\mrakp\OneDrive\Рабочий стол\mamapapads\bot.js:3:13)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:643:32)
Well first off, you can't do
const cofig = require("./botconfig.json")
Then not use the declaration in order to get the token.
In your case, bot.login(token) would actually be bot.login(cofig.token)
But you can also do
const { token } = require("./botconfig.json")
//Rest of code
bot.login(token)
Which would get the token directly, instead of having to use a declaration in order to reference it.
I'm new to programming and I wanted to make a discord bot using Atom and Javascript. I had some previous programming experience, but not much. I tried to find help through other Q/A's with the same error code but I still can't figure out why my program doesn't work. I found how to write this online.
My program is:
const Discord = require("discord.js");
const Config = require("./config.json");
const Token = require("./token.json");
const bot = new Discord.Client({disableEveryone: true})
bot.on("ready", async () =>{
console.log(`${bot.user.username} is online! It's running on
${bot.guild.size} servers!`);
bot.user.setActivity("Work in Progress", {type: "WATCHING"}); })
bot.on("message", async message => {
if{message.author.bot} return;
if(message.channel.type === "dm") return;
message.channel.send("Swift bot testing...") })
bot.login(Token.token);
When I tried to run it with node on Windows Powershell by entering "node app.js", it returned with the error message:
SyntaxError: Unexpected token { at createScript (vm.js:80:10) at
Object.runInThisContext (vm.js:139:10) at Module._compile (module.js:617:28)
at Object.Module._extensions..js (module.js:664:10) at Module.load
(module.js:566:32) at Function.Module._load (module.js:498:3) at
Function.Module.runMain (module.js:694:10) at startup
(bootstrap_node.js:204:16) at bootstrap_node.js:625:3
I don't understand what is wrong! Somebody please help me get my program running.
You have a problem in if:
if{message.author.bot} return;
vs
if(message.author.bot) return;
I had been using node-wit v3.3.2
Today, I wanted to update and use the latest version.
But I'm unable to import node-wit. Not sure why.
I simply copied the code given in their documentation.
'use strict'
var MY_TOKEN="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
const {Wit, log} = require('node-wit');
const client = new Wit({
accessToken: MY_TOKEN,
actions: {
send(request, response) {
return new Promise(function(resolve, reject) {
console.log(JSON.stringify(response));
return resolve();
});
},
myAction({sessionId, context, text, entities}) {
console.log(Session ${sessionId} received ${text});
console.log(The current context is ${JSON.stringify(context)});
console.log(Wit extracted ${JSON.stringify(entities)});
return Promise.resolve(context);
}
},
logger: new log.Logger(log.DEBUG) // optional
});
The terminal shows this:
const {Wit, log} = require('node-wit');
^
SyntaxError: Unexpected token {
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:974:3
Could be the node version you are using. You'll need to use the flag --harmony_destructuring when using a lower version.
Taken from: https://github.com/wit-ai/node-wit
# Node.js <= 6.x.x, add the flag --harmony_destructuring
node --harmony_destructuring examples/basic.js <MY_TOKEN>
# Node.js >= v6.x.x
node examples/basic.js <MY_TOKEN>