Css validator parse error

With a bit of help, you can always establish and eradicate a CSS parse error whenever it happens.

CSS provides a powerful way of styling websites, reducing web page load times, and saving precious time for developers. However, you need to know how to handle a CSS parse error. Read on to find out how.

What Is a Parse Error in CSS?

The parse error in CSS arises when the CSS parser detects something that does not comply with the requirements. Usually, a CSS parser demands CSS be written in a certain way.

CSS parser has specific requirements that include:

• Adding a semicolon at the end of all CSS properties
• One ruleset cannot contain the same CSS property twice
• All rules require both opening and closing curly brackets ({})
• All quotes should be closed

Ways to Minimize Cases of CSS Parse Error

There are ways of keeping your style sheets pristine for both your clients and designs. Having a clean CSS file makes it easy to implement your design ideas without delays. Below are some of the approaches you can use to avoid parsing errors in CSS.

1. Use frameworks

Like icons in the fashion industry set the tone for what is trending, trendsetters in tech influence the styling of thousands of websites. You may wonder how this happens. Well, developers build and publish frameworks which are a set of rules for the common website elements.

The frameworks offer you and other developers a good starting point for web design. They help you design a decent website fast. With a framework, you get a reliable base that you experiment with, like tweaking fonts and colors.

2. Seek simplicity

As the website grows, you will find yourself scrolling through a long list of CSS elements and rules. The rules may override each other in some cases, but eventually, the most specific rule will always win.

You may end up with more code than anticipated, especially when accounting for different screen sizes and browsers. So, it is good practice to always establish before including new style rules; perhaps the existing ones could work.

3. Structure your CSS file

You have various ways of refactoring your CSS code to ease use and navigation. Some of the most straightforward approaches are the most effective. These include:

• Uniform spacing between rules as well as in declarations across the CSS file to make it easy to read.
• Capitalize on semantic or familiar id/class names. For instance, avoid a class name such as “bottom_menu” instead use the semantic tag “footer.”
• Avoid repeating yourself. You should repeat as little code as possible. If some declaration is repeated across the file, consider typing it once and using various selectors.
• Test the CSS code using online tools that parse the file to highlight problem areas and show any parse error message. These tools are useful in pinpointing specific elements and experimenting with various styles.

4. Use advanced CSS

For someone with some programming skills, advanced CSS options like LESS or SASS are recommended. These let you take advantage of complex code options such as functions, nesting, and variables. The approach helps you clean your code and avoid parsing errors.

Rules for Dealing With CSS Parsing Errors

In most cases, a user agent ignores the illegal part of a style sheet. The user agent accomplishes this by parsing the illegal part to establish where it starts and ends. However, it acts as if the illegal part does not exist. User agents obey the following rules once they come across the scenarios below:

– Unknown Properties

The user agent should overlook a declaration with an unknown property. The user agent is going to consider only the part with known properties.

For example:

h1 { color: red; rotation: 70minutes}

The user agent will treat the style sheet as

– Malformed declarations

The user agents should be able to handle tokens they encounter as they parse declarations to the end. They must do this while correctly managing escapes and paying attention to rules on matching pairs of {}, [], (), ‘’, and “”. For instance, a malformed declaration may miss a property value, colon, or property name.

Failure to pair each properly will prompt a CSS parse error. In some cases, the user agent anticipates the beginning of a declaration or at-rule but finds an unexpected token. In such cases, the token is taken to be the first malformed declaration. That token is used to establish which tokens to overlook.

– Illegal values

The user agent should overlook a declaration containing an illegal value. A CSS parser will honor the first rule then ignore the rest. A user agent meeting CSS specifications can accept one or more rules.

– At-Rules Without Known At-Keywords

A user agent will ignore an invalid at-keyword alongside everything that follows it. It ignores everything until the end of the block with the invalid at-keyword or the next semicolon.

– Unexpected End of Style Sheet and String

A user agent should close all the open constructs at the end of the style sheet. These include parentheses, blocks, comments, strings, brackets, and rules. After reaching the end of a line, the user agent must close the string. Failure to terminate all the constructs properly throws a parse error message.

How to Fix a Parse Error in CSS

When you get parse errors as you copy CSS from a different source, you first need to check the final semicolon. The easiest way to fix these errors is to paste the CSS code into an editor like Notepad++. You can use the editor to find or replace these errors.

You can start by replacing all instances of a semicolon curly bracket with a curly bracket. Also, search for “;s” and replace it with “}}}” to avoid bothering with empty rules like {}. The search will show both ;} and ; }. You can then replace }}} with ;} to ensure your CSS rules have the right closing bracket.

To fix parse errors in CSS, review your custom CSS code. Look out for errors like a missing semicolon, curly brackets, or spelling mistakes in CSS properties. Usually, CSS parsing errors arise from one or several errors in custom CSS. After locating the issue in your custom CSS code, make the right changes, save and refresh to resolve the parse error message.

– CSS Parse Error Handling

CSS is resilient and tries very hard to accomplish what you want even when there is an error. Once it establishes an error in one line, it progresses to the next without any error. Sometimes, it is hard to confirm there is a parse error in your style sheet since the browser does not tell. That’s where online CSS validators come in to establish parsing errors in CSS code.

Common CSS Errors Besides Parse Error

No matter your experience, mistakes such as typos or an incorrectly closed tag in CSS are common. Below are the common errors in CSS.

– Forgotten details

With CSS, you can be as creative as possible, but there are some ground rules to follow. Each selector should be as a class or ID, provided it is not HTML TAG. The selector format should be appropriate with braces, property, value, colon, and semicolon.

If you miss one of the little details, strange things will happen, or the intended output will not be visible. CSS validators let you catch the little forgotten details.

– Missed spellings

Missed spelling errors are some of the most common errors in CSS and are easy to ignore. For instance, “left” is different from “left” in CSS and could be the difference between placing something on the right or the left side of your page.

– Multiple Choice

CSS will choose which one to use if the same selector has two references with conflicting information in your CSS code. It is common when you are adding your style sheet to another one. If nothing is happening for a specific selector, search the style sheet for another reference associated with the selector.

– Wrong Selector

Placing your wonderful designs inside the #content when they should be in #context-text will not help your layout. Fortunately, you can easily see these after viewing the page. So, you only need to cut and paste the code in the correct tag.

Conclusion

In this guide, we’ve covered various aspects of CSS parse errors. Here is a summary of what you need to handle these parsing errors:

• Parse error in CSS occurs when a style sheet departs from the precise CSS parser requirements
• Common causes include missing a semicolon, curly brackets, or unknown properties
• With a bit of help from online CSS validators, you can easily catch and fix the error
• Check the line with the parse error and change the code accordingly

Parsing errors in CSS are common but are easy to fix when you know where to look. With this guide, you can indulge your creativity in CSS, knowing you can handle CSS parse errors thrown at you.

Разбор ошибок валидации сайта

Наконец-то появилось свободное время между бесконечной чередой заказов, и я решил заняться своим блогом. Попробуем его улучшить в плане валидации. Ниже в статье я расскажу, что такое валидация сайта, кода html и css, зачем она нужна и как привести сайт к стандартам на конкретном примере.

Что такое валидация сайта?

Простыми словами – это проверка на соответствие стандартам. Чтобы любой браузер мог отображать ваш сайт корректно. Большое влияние валидность сайта на продвижение не оказывает, но хуже точно не будет.

Конкретный пример прохождения валидации для страницы сайта

Возьмем первую попавшуюся страницу на моем сайте — Кодирование и декодирование base64 на Java 8. Забьем адрес страницы в валидатор и смотрим результат:

Errors found while checking this document as HTML 4.01 Transitional!
Result:	105 Errors, 67 warning(s)

Да уж, картина вырисовывается неприятная: больше сотни ошибок и 67 предупреждений – как вообще поисковики индексируют мой блог, и заходят люди? Но не будем огорчаться, а научимся проходить валидацию, справлять ошибки. Итак, первое предупреждение:

Unable to Determine Parse Mode!

The validator can process documents either as XML (for document types such as XHTML, SVG, etc.) or SGML (for HTML 4.01 and prior versions). For this document, the information available was not sufficient to determine the parsing mode unambiguously, because:

the MIME Media Type (text/html) can be used for XML or SGML document types
No known Document Type could be detected
No XML declaration (e.g <?xml version="1.0"?>) could be found at the beginning of the document.
No XML namespace (e.g <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">) could be found at the root of the document.
As a default, the validator is falling back to SGML mode.

Warning No DOCTYPE found! Checking with default HTML 4.01 Transitional Document Type.

No DOCTYPE Declaration could be found or recognized in this document. This generally means that the document is not declaring its Document Type at the top. It can also mean that the DOCTYPE declaration contains a spelling error, or that it is not using the correct syntax.

The document was checked using a default "fallback" Document Type Definition that closely resembles “HTML 4.01 Transitional”.

Это одно и тоже. А исправляется просто: в самом начале страницы добавить тег:

<!DOCTYPE html>

Проверяем ,что у нас получилось и видим, что одним этим тегом мы убрали 105 ошибок и 3 предупреждения! Теперь у нас осталось только 64 предупреждения. Начинаем разбирать их по одному.

Warning: The type attribute for the style element is not needed and should be omitted.
From line 5, column 1; to line 5, column 23
/x-icon">↩<style type="text/css">↩↩↩↩A 

Это значит, что для элемента style не нужен атрибут type – это лишнее. На странице у нас два таких замечания. Аналогичное предупреждение и по JavaScript:

Warning: The type attribute is unnecessary for JavaScript resources.
From line 418, column 1; to line 418, column 31
</script>↩<script type="text/javascript">↩$(doc

Таких у нас 8 ошибок. Убираем данные атрибуты и ура – еще на 10 предупреждений меньше!

Error: CSS: background: The first argument to the linear-gradient function should be to top, not top.
At line 39, column 61
0%,#E8E8E8 100%);↩    border-r

Следующая ошибка — первый аргумент у linear-gradient должен быть to top, а не top. Исправлем. Далее ошибка:

Error: CSS: Parse Error.
From line 65, column 13; to line 65, column 16
margin: 0 auto;↩padd

Здесь у меня неверно закомментировано css. Надо просто убрать эту строку. Или закомментировать по-другому /* и */. Я так сделал, как привык так комментировать на Java.

Error: CSS: @import are not allowed after any valid statement other than @charset and @import..
At line 88, column 74
0,600,700,300);↩@import url(//

Теперь у нас идет ошибка импорта. Перенесем эти строчки в самое начало файла и она исчезнет.

Error: Bad value _blanck for attribute target on element a: Reserved keyword blanck used.
From line 241, column 218; to line 241, column 295
 cookies. <a href="//upread.ru/art.php?id=98" target="_blanck" style="display: inline;">Здесь

Далее не нравится значение атрибута target, нам сообщают, что надо использовать «blank» без нижнего подчеркивания спереди. Убираем.

Error: End tag li seen, but there were open elements.
From line 379, column 2; to line 379, column 6
<ul>↩	</li>↩↩</ul

Теперь у нас идет div не на месте.

Error: Table columns in range 2…3 established by element td have no cells beginning in them.
From line 262, column 5; to line 263, column 94
px;">↩<tr>↩<td colspan="3" style="width:100%; padding-bottom: 25px;padding-top: 0px; text-align:center;">↩<img 

Следующая ошибка – лишний colspan у ячейки. В моем случае таблица состоит всего из одной ячейки, видимо, забыл убрать, когда менял дизайн. Теперь это и делаем.

Error: Element style not allowed as child of element div in this context. (Suppressing further errors from this subtree.)
From line 486, column 1; to line 486, column 7
↩</table>↩<tyle>↩.hleb
Contexts in which element style may be used:
Where metadata content is expected.
In a noscript element that is a child of a head element.
In the body, where flow content is expected.
Content model for element div:
If the element is a child of a dl element: one or more dt elements followed by one or more dd elements, optionally intermixed with script-supporting elements.
If the element is not a child of a dl element: Flow content.

А эта ошибка говорит о том, что нельзя вставлять style внутри div. Переносим в начало файла.

Error: The width attribute on the table element is obsolete. Use CSS instead.
From line 505, column 1; to line 505, column 21
>↩↩↩↩↩↩↩↩↩<table width ="100%">↩<tr>↩

Тут нам подсказывают, что не стоит устанавливать ширину атрибутом, а лучше сделать это отдельным тегом. Меняем на style=»width:100%;».

Error: Duplicate attribute style.
At line 507, column 41
ign="top" style="padding-right

Переводим: дублируется атрибут style. Второй стиль при этом работать не будет. Объединяем

Error: Attribute name not allowed on element td at this point.
From line 506, column 5; to line 507, column 82
0%;">↩<tr>↩<td style="width:1%;padding-right:10px;" valign="top" name="navigid" id="navigid">↩↩↩↩</
Attributes for element td:
Global attributes
colspan - Number of columns that the cell is to span
rowspan - Number of rows that the cell is to span
headers - The header cells for this cell

У ячейки не должно быть имени – атрибута name. Тут в принципе можно убрать, id вполне хватит.

Error: The valign attribute on the td element is obsolete. Use CSS instead.
From line 506, column 5; to line 507, column 67
0%;">↩<tr>↩<td style="width:1%;padding-right:10px;" valign="top" id="navigid">↩↩↩↩</

Убираем valign. Вместо него ставим style=»vertical-align:top».

Error: & did not start a character reference. (& probably should have been escaped as &.)
At line 543, column 232
при lineLength &t;= 0) и lineS

А эта ошибка вообще непонятно как оказалась ) Это я коде к статье ошибся. Меняем на <

Error: An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
From line 654, column 1; to line 654, column 30
 /><br />↩<img src="img/art374-1.jpg" />↩<br /

У изображений должен быть alt. Добавляем альты с описанием картинок.

Error: CSS: padding: only 0 can be a unit. You must put a unit after your number.
From line 260, column 18; to line 260, column 19
dding: 10 20;↩}↩↩#

Только ноль может быть без обозначений. Надо поставить что – это пиксели, или к примеру, проценты. Добавляем px после чисел.

Warning: The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
At line 974, column 8
ipt> ↩↩↩ <!--детектим адблок

Не нравятся комментарии. Да, в общем, их можно и убрать, не разбираясь, не особенно они и нужны.

Error: Stray end tag td.
From line 982, column 1; to line 982, column 5
↩</table>↩</td>↩↩<sty

Заблудившийся тег td. Убираем его.

Error: Bad value  for attribute action on element form: Must be non-empty.
From line 1102, column 6; to line 1102, column 98
/h6>↩					<form action="" id="jaloba-to-me" class="submit" method="POST" accept-charset="windows-1251">	<tabl

Здесь валидатор не устраивает пустое значение атрибута action – должен быть адрес страницы какой-то. У нас обрабатывается данная форма js, так что без разницы, поставим action=”self”

Все! Смотрим результат:

Нет ошибок или предупреждений, страница полностью валидна.

Если вам что-то непонятно в статье или вы хотите, чтобы ваш сайт полностью соответствовал спецификации и стандартам HTML ,вы можете обратиться ко мне. Я проверю и устраню любые шибки валидации.

Автор этого материала — я — Пахолков Юрий. Я оказываю услуги по написанию программ на языках Java, C++, C# (а также консультирую по ним) и созданию сайтов. Работаю с сайтами на CMS OpenCart, WordPress, ModX и самописными. Кроме этого, работаю напрямую с JavaScript, PHP, CSS, HTML — то есть могу доработать ваш сайт или помочь с веб-программированием. Пишите сюда.

заметки, сайтостроение, html, валидация

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CSS: Parse Error.

CSS styles could not be parsed, check the indicated line to find what caused the parser to fail. Common causes are unclosed curly brackets or comments, missing semicolons or unexpected or empty properties.

A CSS definition for background-image could not be understood by the parser. Check its definition to ensure that it’s well formed and that it contains an appropriate value.

A CSS definition for an X property could not be understood by the parser. Check it to ensure that it’s well formed and that it contains an appropriate value.

The element does not accept a height attribute. Use CSS instead.

I have a website assessment due next week and I need to fix this!

Here’s my code:

<!DOCTYPE html>
<html>
	<head>
	<meta name="viewport" content="width=device-width"> <!-- learnt this off code avengers,,, used to make every device undeerstand my page and show the correct size-->
	<title> Learn Basic Maori </title>
		<style>
			body {
				text-align: center; 
				color: white;
				background-color: #B3733C;
				background-image: url("images/swirl.png"); /* copied off w3schools and replaced with my image */
				margin: auto;
				font-size: large;
			}
			
			h1 {
				text-shadow: 2px 2px 8px #212121 ;
			}
			
			img {
				width: 250px;
			}

This is the first couple lines of code, yes it does have an end tag, both the style html and head tag do. I can’t seem to fix it.

The error from the html validator reads » Parse Error. Style sheets should not include HTML syntax. . » and also I have a stray end tag which doesn’t show up on my html editor? I know for a fact it’s not there but the validator disagrees. Someone help!!!!