Uncaught syntaxerror unexpected identifier как исправить - Сайт, где вы сможете решить свои вопросы

Допустим, у нас есть такой код на JavaScript:

var backgrounds=array();

backgrounds[0]="/img/back_web.png";

backgrounds[1]="/img/back_web2.png";

document.getElementById('fon').style.background='url('backgrounds[1]') bottom no-repeat';

После запуска в браузере код падает с ошибкой:

❌ Uncaught SyntaxError: Unexpected identifier

Это значит, что в коде появилась неизвестная переменная, команда или объект, о которых браузер не знает. Он не понимает, что за слово или символ он встретил, поэтому выводит такое сообщение.

👉 Скорее всего, в коде просто опечатка. Но имеет смысл проверить и другие возможности.

Что делать с ошибкой Uncaught SyntaxError: Unexpected identifier

Как и с большинством ошибок, браузер сообщает нам номер строки, где произошла ошибка. У нас это будет четвёртая строка:

Если нажмём на номер строки с ошибкой, браузер покажет нам подробности:

Мы видим, что браузер не понял, что за команды идут после ‘url(‘, поэтому подчеркнул их все красной линией. Похоже, он подумал, что мы хотели сообщить элементу fon стиль фона в виде текста url( — и всё, дальше закрылась кавычка. И что происходит дальше в коде, интерпретатору JavaScript непонятно. «Вы же закрыли кавычку, что вам от меня нужно?»

Конкретно в нашем примере программист пытается установить фон какого-то элемента, а в массиве backgrounds у него лежат адреса и названия файлов с фоном. Программист пытается подставить содержимое backgrounds внутрь инструкции CSS, но для этого нужно использовать плюсы (склеить строку). Без плюсов это всё считается как одна большая опечатка.

Правильно — вот так:

document.getElementById('fon').style.background='url(' + backgrounds[1] + ') bottom no-repeat';

Но это конкретно в случае нашего кода. Unexpected identifier может появиться и в других случаях:

допущены опечатки;
лишние символы там, где их быть не должно;
наоборот, пропустили что-то нужное (например, плюс или запятую);
используется переменная или функция, которая не была объявлена выше;
пропущенная точка с запятой.

Попробуйте сами

Каждый из этих фрагментов кода даст ошибку Uncaught SyntaxError: Unexpected token. Попробуйте это исправить.

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for (val i = 0 i < 64; i += 4
{

}

function hex(x) {
  for (var i = 0; i < x.length; i++) {
    x i = rhex(x[i]);
  }
  return x.join('');
}

Источник

I downloaded and installed node.js on Windows and I’m following a simple tutorial from nodebeginner.org.

I’ve created a file called HelloWorld.js which contains just:

console.log("Hello World");

When I type node HelloWorld.js in the node.js console I get:

SyntaxError: Unexpected identifier

I checked my classpath variable and it has the C:Program Filesnodejs on it.

HelloWorld.js is still open in Notepad++ for editing.

What am I doing wrong?

jwpfox

5,10411 gold badges45 silver badges42 bronze badges

asked Nov 14, 2016 at 9:18

I think you are already in the the console.

Just follow the steps to fix the error:

1) Try doing CTRL + C couple of times. See if you exit the console

2) Then do node HelloWorld.js

I think you will get your output

When in your node console already, you can simply do require("./HelloWorld.js") to get the output. (Given that you are in the directory that contains this file)

answered Nov 14, 2016 at 9:29

Rahul AroraRahul Arora

4,4931 gold badge16 silver badges23 bronze badges

A little late but I figured this out as I’m learning it as well. You are not in the correct Node.js command window:

You are probably trying to run Node.js, ie. the one with the red arrow. This gives you the “Unexpected identifier” error. You want the Node.js command prompt, or the one shown with a green arrow.

Craig

answered Oct 21, 2022 at 14:38

When I type node HelloWorld.js in the node.js console I get

You should type JavaScript into the Node.js console.

node is a program name. HelloWorld.js is a command line argument. They are not JavaScript.

You should type those into your shell (e.g. Windows Powershell or bash).

answered Nov 15, 2016 at 10:26

QuentinQuentin

904k122 gold badges1199 silver badges1325 bronze badges

I had the same issue when following an online course, my mistake was that i did not safe the file i was following as .js in the name when saving.
Therefore my Hello.js did not open because it was only Hello

answered Jul 29, 2020 at 10:31

If people are facing below-mentioned error: Uncaught SyntaxError: Unexpected identifier at the time of running, console.log("Hello World"); code with command, node HelloWorld.js, in VS code editor

Problem :

node HelloWorld.js ^^^^^ Uncaught SyntaxError: Unexpected identifier

Solution :

(1) Just install Babel JavaScript extension in VS code editor

(2) After Babel JavaScript extension is installed, save your Program and then run your program with the command, node HelloWorld.js

Definitely will get the expected result.

kyun

9,5409 gold badges29 silver badges64 bronze badges

answered Oct 23, 2021 at 11:46

I’m on linux and I’d the same issue
what I was writing in terminal is :

node
node file.js
all what I had to do is to write node file.js from the start without writing node first .

answered Jan 19, 2022 at 15:52

Although the question is old, I just solved it. So for anyone who still likes an answer: Apparently Node.Js installs two different consoles or executables. There is “Node.js” and there is “Node.js command prompt”. Use the latter and it will work

To clarify, I used another tutorial in Dutch. Use the Javascript code in there and then in your web browser type http://localhost:3000. There you will see the Hello World output.

Zach Jensz

3,5875 gold badges14 silver badges30 bronze badges

answered May 18, 2022 at 13:58

On windows hit CTRL + D to exit REPL and then run HelloWorld.js again

Tyler2P

2,30424 gold badges22 silver badges31 bronze badges

answered May 30, 2022 at 9:04

Источник

Since JavaScript is not a compiled language, you can get syntax errors when running your code.

One of these errors is the Uncaught SyntaxError: Unexpected identifier error.

In this post, we’ll look at what causes this, examples of it, and how to fix it.

What causes this error?

This error is mainly caused by three things.

A missing bracket, quote, parenthesis, etc.
Extra brackets, quotes, parenthesis, etc.
A typo in a keyword like for, if, while, etc.

Examples of this error

Now that we know what causes it, let’s look at a few examples of code that causes it.

Here’s an example of declaring a const incorrectly:

	Const array = [1, 2, 3, 4, 5];

	SyntaxError: Unexpected identifier

Keywords in JavaScript are case-sensitive. That means that Const is not the same as const.

Now, let’s look at an example of a missing comma, which will also trigger this error:

	const obj = {
    a: 1
    b: 2,
};

Because in this case, we are missing a comma after a: 1, this object was not able to be parsed correctly and therefore threw the error.

The fix is to ensure your code’s syntax complies with the JavaScript syntax rules and you should be good to go.

Conclusion

In this post, we looked at what causes the Uncaught SyntaxError: Unexpected identifier error and how to fix it.

In most cases, it is just code that is not adhering to the JavaScript syntax rules or contains typos.

Hopefully, this post has helped you with your code!

If you want to learn about web development, founding a start-up, bootstrapping a SaaS, and more, follow me on Twitter! You can also join the conversation over at our official Discord!

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Содержание

Uncaught SyntaxError: Unexpected identifier — что это означает?
Что делать с ошибкой Uncaught SyntaxError: Unexpected identifier
Попробуйте сами
How to Fix «Uncaught SyntaxError: Unexpected identifier» in JavaScript
What causes this error?
Examples of this error
Conclusion
The Joomla! Forum™
Parse Error on Website Topic is solved
Parse Error on Website
Parse Error on Website

Uncaught SyntaxError: Unexpected identifier — что это означает?

Вредная ошибка, которую легко исправить.

Допустим, у нас есть такой код на JavaScript:

После запуска в браузере код падает с ошибкой:

❌ Uncaught SyntaxError: Unexpected identifier

👉 Скорее всего, в коде просто опечатка. Но имеет смысл проверить и другие возможности.

Что делать с ошибкой Uncaught SyntaxError: Unexpected identifier

Если нажмём на номер строки с ошибкой, браузер покажет нам подробности:

Правильно — вот так:

document.getElementById(‘fon’).style.background=’url(‘ + backgrounds[1] + ‘) bottom no-repeat’;

Но это конкретно в случае нашего кода. Unexpected identifier может появиться и в других случаях:

допущены опечатки;
лишние символы там, где их быть не должно;
наоборот, пропустили что-то нужное (например, плюс или запятую);
используется переменная или функция, которая не была объявлена выше;
пропущенная точка с запятой.

Попробуйте сами

Каждый из этих фрагментов кода даст ошибку Uncaught SyntaxError: Unexpected token. Попробуйте это исправить.

Источник

How to Fix «Uncaught SyntaxError: Unexpected identifier» in JavaScript

Since JavaScript is not a compiled language, you can get syntax errors when running your code.

One of these errors is the Uncaught SyntaxError: Unexpected identifier error.

In this post, we’ll look at what causes this, examples of it, and how to fix it.

What causes this error?

This error is mainly caused by three things.

A missing bracket, quote, parenthesis, etc.
Extra brackets, quotes, parenthesis, etc.
A typo in a keyword like for , if , while , etc.

Examples of this error

Now that we know what causes it, let’s look at a few examples of code that causes it.

Here’s an example of declaring a const incorrectly:

Keywords in JavaScript are case-sensitive. That means that Const is not the same as const .

Now, let’s look at an example of a missing comma, which will also trigger this error:

Because in this case, we are missing a comma after a: 1 , this object was not able to be parsed correctly and therefore threw the error.

The fix is to ensure your code’s syntax complies with the JavaScript syntax rules and you should be good to go.

Conclusion

In this post, we looked at what causes the Uncaught SyntaxError: Unexpected identifier error and how to fix it.

In most cases, it is just code that is not adhering to the JavaScript syntax rules or contains typos.

Hopefully, this post has helped you with your code!

If you want to learn about web development, founding a start-up, bootstrapping a SaaS, and more, follow me on Twitter! You can also join the conversation over at our official Discord!

Give feedback on this page , tweet at us, or join our Discord !

Источник

The Joomla! Forum™

Parse Error on Website Topic is solved

Parse Error on Website

Post by Desteria » Tue Feb 09, 2021 6:17 pm

Hello, I’m receiving the following parse error on my website — Parse error: syntax error, unexpected ‘class’ (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or ‘<‘ or ‘$’ in /public_html/plugins/system/backuponupdate/backuponupdate.php on line 271

As background, I just migrated hosts and my host offers things that are automatically installed via Softaculous. I had previously installed, and then uninstalled WordPress, then migrated my Joomla site over from my old host. This morning I saw that Softaculous still registered the WordPress as installed, so I uninstalled it. Now, getting that error.

I uploaded all associated files from a backup of my site I took abut 5 days ago, hoping it would fix the issue but it hasn’t. When looking at line 271 of that file on Notepad++ I see the following:

if (class_exists(‘JoomlaCMSFactory’, true) && method_exists(Factory::class, ‘getDocument’))

Parse Error on Website

Post by Desteria » Tue Feb 09, 2021 7:14 pm

Encountering the following error on my website. Occurred after I uninstalled a WordPress installation that my host had automatically installed using Softaculous installer in the same directory. Was working fine before I uninstalled the WordPress.

On line 212 in that file —
* @since 5.4.1

Database Configuration :: Version: 5.6.41-84.1 (Client:5.6.41-84.1) | Database Size: 14.13 MiB | #of Tables with config prefix: 122 | #of other Tables: 0 | User Privileges : GRANT ALL

Switch User Environment :: PHP CGI: Yes | Server SU: Yes | PHP SU: Yes | Potential Ownership Issues: No

Extensions Discovered :: wrote: Components :: Site ::
Core :: com_mailto (3.0.0) 1 | com_wrapper (3.0.0) 1 |
3rd Party::

Источник

How much code do you write? Whether the answer is a few lines here and there or hundreds of lines each day, it is always easy to create small typos or other spelling-related mistakes in your code. With JavaScript being an interpreted language, any errors that may be caused by a spelling or syntactical mistake in your code will likely not be detected until runtime which could mean a frustrating bug in development or, in the worst case, a production bug. So, how do you resolve the Unexpected identifier error**?**

The Problem

As you might imagine from the intro to this article, the most likely cause of the Unexpected identifier error is a spelling mistake or typo in your code. Let’s look at a few examples:

Var foo = ‘foo’; // ❌
var foo = ‘foo’; // ✔️

constt fooBar = ‘fooBar’; // ❌
const fooBar = ‘fooBar’; // ✔️

leT bar = ‘bar’; // ❌
let bar = ‘bar’; // ✔️

Additionally, your error could be due to a syntax error such as a missing parentheses or curly brace:

const condition = true;

if condition {} // ❌
if (condition) {} // ✔️

These may seem obvious here but it is still very easy to accidentally make mistakes like these in your code, so no shame if that is what brought you here!

The Solution

How do you fix this Unexpected identifier error in your code? The simplest thing you can do to find a specific error like this in your code is to use a tool such as this JavaScript Validator. It will look through your code and if it detects any errors it will tell you specifically where that error exists.

What about prevention? How could you avoid this error in the future?

The first thing to do here is to take a close look at your code and think about its formatting. It is a good practice to format your code in such a way that it is easy for you to read quickly. Code formatting is highly subjective: single vs double quotes, tabs vs spaces, semi-colon vs no semi-colon, etc. Each programmer, team, and company may have their own opinion on how code should look. At the end of the day, the important part is that you can read the code so try to find and stick to a format that works for you. Additionally, you can use tools such as Prettier which will help automatically format your code. Keeping your code formatted will make it easier to notice syntax errors before they become a problem.

Another tool you could employ is ESLint. This tool can help enforce code formatting rules (using the aforementioned Prettier if you so desire) as well as code conventions and style. More specifically, ESLint also has a spellcheck plugin which will do an even better job of picking up on any identifier issues in your code.

Conclusion

In this article you learned about what may cause the Unexpected identifier error and how to fix it. We also introduced a few helpful tools that you could use in your code. Combine all these tools and not only will you resolve your current Unexpected identifier error, but also you will hopefully prevent similar errors in the future. Thanks for reading!

Источник

Что делать с ошибкой Uncaught SyntaxError: Unexpected identifier

Попробуйте сами

What causes this error?

Examples of this error

Conclusion

Uncaught SyntaxError: Unexpected identifier — что это означает?

Что делать с ошибкой Uncaught SyntaxError: Unexpected identifier

Попробуйте сами

How to Fix «Uncaught SyntaxError: Unexpected identifier» in JavaScript

What causes this error?

Examples of this error

Conclusion

The Joomla! Forum™

Parse Error on Website Topic is solved

Parse Error on Website

Parse Error on Website

The Problem

The Solution

Conclusion

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