id ‘s value must not contain whitespace (spaces, tabs etc.). Browsers treat non-conforming IDs that contain whitespace as if the whitespace is part of the ID. In contrast to the class attribute, which allows space-separated values, elements can only have one single ID value.
Can HTML ID have special characters?
The HTML 4.01 spec states that ID tokens must begin with a letter ( [A-Za-z] ) and may be followed by any number of letters, digits ( [0-9] ), hyphens ( – ), underscores ( _ ), colons ( : ), and periods ( . ). … Classnames can contain any character, and they don’t have to start with a letter to be valid.
Can HTML class names have spaces?
A class name can’t have spaces. When you have a space-separated string in your class attribute, you’re always giving your element several classes.
Can div id have spaces?
Like others said, you cannot use spaces for the id, but you can for the class. You should not use whitespace in the ID element, as whitespace is generally accepted as a selector combinator.
Can HTML have 2 IDs?
An element can’t have more than one ID and an ID can’t be used more than once in a page. … By definition, an element needing an ID should be unique but if you need two ID’s then it’s not really unique and needs a class instead.
What is ID used for in HTML?
The id global attribute defines an identifier (ID) which must be unique in the whole document. Its purpose is to identify the element when linking (using a fragment identifier), scripting, or styling (with CSS).
What are the two major types of HTML elements?
There are multiple kinds of HTML elements: void elements, raw text elements, and normal elements.
Can CSS class name have space?
The class name can’t contain a space, but it can contain hyphens or underscores. … Any tag can have multiple space-separated class names.
How do I identify a class in CSS?
In the CSS, a class selector is a name preceded by a full stop (“.”) and an ID selector is a name preceded by a hash character (“#”). The difference between an ID and a class is that an ID can be used to identify one element, whereas a class can be used to identify more than one.
How do you call two classes in CSS?
To specify multiple classes, separate the class names with a space, e.g. <span class=”left important”>. This allows you to combine several CSS classes for one HTML element.
What does div id mean HTML?
Definition and Usage
What is id in input tag in HTML?
What is a class HTML?
Class in html:
What happens if two HTML elements have the same ID?
Yes – whether they are the same tag or not, browsers will render the page even if multiple elements have the same ID.
Can two Div have same ID?
Can two HTML elements have same name?
Regarding the HTML 4.01 specication, you can use form elements with the same name attribute, as there is no uniqueness requirement on them. … It is undefined what happens when same name attribute is used, but what browsers seem to do is to return an array. In your example, document.