| address |
3 |
2 |
The location where something is stored. |
| align-items property |
8 |
14 |
A property to align elements with respect to the cross axis in a flexible box layout, with values such as flex-start, center, stretch, and flex-end. |
| alternative text attribute |
3 |
2 |
An attribute supplying text to display, if an image cannot be loaded. |
| ancestor |
2 |
2 |
The parent or parent of the parent or so on. |
| anchor |
2 |
11 |
A source or destination of a hyperlink. |
| article element |
5 |
11 |
An element that designates a self-contained part of the content. |
| aside element |
5 |
11 |
An element containing material tangential to other material. |
| attribute |
3 |
1 |
Extra information added to an element. |
| autofocus attribute |
9 |
2 |
An attribute of a form control to specify the focus. |
| background-color property |
4 |
10 |
A property to specify the colour of the background, with values given as colours. |
| block-level |
6 |
2 |
Display of an element on a new line to take the whole horizontal space. |
| body element |
2 |
9 |
An element that contains all the content of the page. |
| border |
6 |
1 |
The border of the element. This is also a property. |
| border-collapse property |
5 |
7 |
A property to specify whether or not borders of table cells collapse, with values collapse and separate. |
| border property |
6 |
9 |
A property that styles all aspects of all borders, that is, width, style, and colour. |
| bottom property |
8 |
1 |
A property indicating the position with respect to the bottom of the page, with values given as numbers. |
| box model |
6 |
1 |
A way of viewing each element as a box. |
| box-sizing property |
6 |
11 |
A property that specifies to which dimensions the height and width properties refer, with values content-box and border-box. |
| caption element |
5 |
11 |
An element containing the caption for an image. This is placed inside a figure element. |
| cascading |
10 |
1 |
How styles are determined for elements that are covered by more than one rule. |
| character encoding declaration |
3 |
4 |
A declaration to indicate the encoding used by the computer. |
| checked attribute |
9 |
3 |
An attribute to preset a checkbox in a form to be checked. |
| child |
2 |
2 |
A node "below" a node in a tree, connected by an edge. |
| child selector |
7 |
5 |
The selector one > two selects any element selected by two which is a child of an element selected by one. |
| class |
3 |
8 |
An attribute assigning an element to a named class. |
| clear property |
8 |
8 |
A property that can specify that an element not flow around a floating element, with values such as left, right, and both. |
| client |
1 |
1 |
The computer of the reader of the web page. |
| closing tag |
2 |
9 |
A marker showing the end of an element. |
| collapsing margins |
6 |
12 |
The phenomenon of the size of margin between two elements being calculated as the maximum of the sizes of the margins, not the sum. |
| color property |
4 |
1 |
A property to designate colour of content, with values given as colours. |
| column span attribute |
11 |
4 |
An attribute of a table header or data element to indicate the number of columns to span. |
| comment |
4 |
4 |
Information for people that is ignored by the computer. |
| content |
2 |
9 |
Information appearing between the start tag and end tag of an element. |
| control |
9 |
1 |
A way to collect information in forms. |
| cross axis |
8 |
12 |
The axis that is not the main axis in a flexible box layout. |
| declaration |
4 |
1 |
A specification of style as property:value. |
| deprecated |
1 |
3 |
Describes a feature no longer supported by current software. |
| descendant |
2 |
2 |
A child or child of a child or so on. |
| descendant selector |
7 |
5 |
The selector one two selects any element selected by two which is a descendant of an element selected by one. |
| description list description element |
11 |
3 |
An element for the description of a term in a description list. |
| description list element |
11 |
3 |
An element for a description list. |
| description term element |
11 |
3 |
An element for a term in a description list. |
| display property |
6 |
2 |
A property that controls how an element is displayed, with values such as inline, block, inline-block, flex, inline-flex, and none. |
| division element |
2 |
16 |
An element used to group elements on different lines. |
| document |
2 |
9 |
Information in HTML. |
| document type declaration |
3 |
4 |
A declaration to show that the document is written in HTML. |
| edge |
2 |
2 |
A connection between nodes in a tree. |
| element |
2 |
9 |
A part of the content of a web page. |
| empty-cells property |
5 |
7 |
A property to specify how empty table cells are styled, with values show and hide. |
| empty element |
2 |
18 |
An element specified using a single tag. |
| end tag |
2 |
9 |
A marker showing the end of an element. |
| entity |
2 |
19 |
A special code for indicating a reserved character. |
| external style sheet |
4 |
4 |
A collection of styling rules in a separate file. |
| field |
9 |
1 |
A way to collect information in forms. |
| fieldset element |
9 |
1 |
An element containing a set of fields for a form. |
| figure element |
5 |
11 |
An element containing an image and a caption. |
| first-letter pseudo-element |
7 |
17 |
The first letter of text content of the chosen element. |
| first-line pseudo-element |
7 |
17 |
The first line of text content of the chosen element. |
| flex-direction property |
8 |
12 |
A property used to indicate the direction of elements in a flexible box layout, with values such as row, row-reverse, column, and column-reverse. |
| flex property |
8 |
12 |
A property of contained elements in a flexible box layout, indicating how much growing and shrinking is allowed, with three values specified. |
| flex-wrap property |
8 |
12 |
A property used to indicate whether or not elements in a flexible box layout should wrap to the next line, with values such as nowrap, wrap, and wrap-reverse. |
| float property |
8 |
5 |
A property that allows an element to float left or right in its container, with values such as none, left, and right. |
| font-size property |
4 |
10 |
A property to specify the size of the font, with values given as sizes. |
| font-style property |
4 |
1 |
A property to specify font style, with values such as italic, normal, and oblique. |
| font-weight property |
4 |
10 |
A property to specify the weight of a font, with values such as normal and bold. |
| footer element |
5 |
11 |
An element providing footer material for all or part of the contents of the page. This should not be contained in the main element. |
| for attribute |
9 |
1 |
An attribute of a label to match the ID value for the control it labels. |
| form element |
9 |
1 |
An element for a form. |
| general sibling selector |
7 |
9 |
The selector one ~ two selects any element selected by two which is the sibling of an element selected by one. |
| global attribute |
3 |
1 |
An attribute that can be added to any element. |
| head element |
2 |
9 |
An element that gives information about the page. |
| header element |
5 |
11 |
An element providing heading material for all or part of the contents of the page. This should not be contained in the main element. |
| heading element |
2 |
11 |
An element that gives a heading. |
| height attribute |
3 |
2 |
An attribute specifying the height, such as of an image. |
| height property |
6 |
4 |
A property that gives the height of the content, with values given as sizes. |
| hexadecimal |
4 |
15 |
Expression of a number in base 16. |
| horizontal rule element |
2 |
18 |
An element that makes a horizontal line. |
| html element |
2 |
9 |
An element for the entire document. |
| hyperlink element |
2 |
11 |
An element used to include a hyperlink. |
| hyperlink reference attribute |
3 |
2 |
An attribute used to specify an address for a hyperlink. |
| ID |
3 |
6 |
An attribute specifying a unique identifier for an element. |
| image element |
2 |
18 |
An element used to include an image. |
| inherit |
10 |
1 |
A feature of some types of styling indicating that it can be passed on from an ancestor in the tree representation of the document. |
| inline |
6 |
2 |
Display of an element on a line with other elements. |
| input element |
9 |
2 |
An element for a control in a form (types include text, reset, password, checkbox, radio, button and submit). |
| internal style sheet |
4 |
3 |
A collection of styling rules within a document. |
| justify-content property |
8 |
13 |
A property to align elements with respect to the main axis in a flexible box layout, with values such as flex-start, center, space-around, space-between, and flex-end. |
| label element |
9 |
1 |
An element used to provide a caption for a control in a form. |
| language attribute |
3 |
1 |
A global attribute specifying the language in which text is written. |
| leaf |
2 |
2 |
A node without a child. |
| left property |
8 |
1 |
A property indicating the position with respect to the left of the page, with values given as numbers. |
| legend element |
9 |
1 |
An element containing a title for a fieldset. |
| letter-spacing property |
4 |
10 |
A property to specify the amount of space between characters, with values given as sizes. |
| lexicographical order |
10 |
10 |
A way of ordering triples of values. |
| line break element |
2 |
18 |
An element that inserts a line break. |
| line-height property |
4 |
10 |
A property to specify the height of each line, with values given as sizes. |
| link element |
4 |
4 |
An element used to create a link between a document and an external resource. |
| list item element |
5 |
2 |
An element for an item in a list. |
| list style property |
5 |
5 |
A property of lists that specifies the numbers or bullets to use, using values such as lower-alpha and square. |
| main axis |
8 |
12 |
The axis (horizontal or vertical) with respect to which flexible box layout elements are positioned. |
| main element |
5 |
11 |
An element that contains the main content of the page. |
| margin |
6 |
1 |
Empty space that acts as a buffer between borders of adjacent elements. This is also a property. |
| markup language |
1 |
2 |
A way of adding extra information to a text document. |
| metadata element |
3 |
4 |
An element in the head containing such information as the encoding. |
| multiple attribute |
9 |
5 |
An attribute of a select element to specify that more than one option can be selected. |
| name attribute |
9 |
4 |
An attribute of an input element of type radio that is used to assign the same name to all related radio buttons. |
| navigation element |
5 |
11 |
An element containing hyperlinks for navigation. |
| next sibling selector |
7 |
9 |
The selector one + two selects any element selected by two which is the next sibling of an element selected by one. |
| node |
2 |
2 |
A part of a tree. |
| normal flow |
8 |
1 |
Order in which elements are listed. |
| option element |
9 |
5 |
An element for an option in a dropdown menu. |
| ordered list element |
5 |
2 |
An element for an ordered list. |
| padding |
6 |
1 |
Empty space that acts as a buffer between the content and the border. This is also a property. |
| padding property |
6 |
7 |
A property that styles the empty space that acts as a buffer between contents and the border, with values given as sizes. |
| paragraph element |
2 |
11 |
An element consisting of text that forms a paragraph. |
| parent |
2 |
2 |
The node "above" a node in a tree, connected by an edge. |
| placeholder attribute |
9 |
2 |
An attribute of an input element specifying placeholder text. |
| position property |
8 |
1 |
A property to specify where to position an element with respect to normal flow, with values such as static, absolute, relative, and fixed. |
| prefix |
7 |
14 |
A new string formed by removing zero or more characters from the end of a string. |
| property |
4 |
1 |
An aspect of an element that can be styled. |
| pseudo-class |
7 |
18 |
A way to specify in a selector how to style an element based on the state it is in, such as a visited link. |
| pseudo-element |
7 |
17 |
A way to specify in a selector how to style specific information in a chosen element, such as the first line or letter of text. |
| radio buttons |
9 |
4 |
A form control which allows only one option to be selected. |
| relationship attribute |
4 |
4 |
An attribute showing the relationship between a document and an external resource. |
| render |
2 |
12 |
To display a web page in a browser. |
| reverse list attribute |
11 |
2 |
An attribute of an ordered list that reverses the order of the items. |
| right property |
8 |
1 |
A property indicating the position with respect to the right of the page, with values given as numbers. |
| root |
2 |
2 |
A node without a parent. |
| row span attribute |
11 |
4 |
An attribute of a table header or data element to indicate the number of rows to span. |
| rule |
4 |
3 |
A selector followed by one or more declarations. |
| scope attribute |
11 |
4 |
An attribute of a table header to indicate whether it is associated with a row, column, or group (values include row, col, rowgroup, and colgroup). |
| scripting language |
1 |
2 |
A language used for a specific domain, such as the web. |
| section element |
5 |
11 |
An element used as a thematic grouping of material. |
| selected attribute |
9 |
5 |
An attribute of an option to specify that it has been selected. |
| select element |
9 |
5 |
An element for a dropdown menu in a form. |
| selector |
4 |
3 |
A way of specifying to which parts of a document the declarations in a rule apply. |
| server |
1 |
1 |
A computer owned by the website. |
| sibling |
2 |
2 |
A sibling of a node x is a node with the same parent as x. |
| source attribute |
3 |
2 |
An attribute used to specify the source from which a file can be obtained. |
| span element |
5 |
1 |
An element used to group elements that share a line. |
| specificity |
10 |
1 |
A measure of a style rule by which it is prioritized. |
| start list attribute |
11 |
2 |
An attribute of an ordered list that specifies the starting number of the first item. |
| start tag |
2 |
9 |
A marker showing the beginning of an element. |
| string |
3 |
1 |
Information appearing between quotation marks. |
| style attribute |
4 |
2 |
An attribute specifying the style of an element. |
| style element |
4 |
3 |
An element containing rules for styling. |
| substring |
7 |
14 |
A new string formed by removing zero or more characters from the end of a string and zero or more characters from the beginning of a string. |
| suffix |
7 |
14 |
A new string formed by removing zero or more characters from the beginning of a string. |
| table body element |
11 |
4 |
An element for a group of body rows in a table. |
| table data element |
5 |
7 |
An element for a data item in a table. |
| table element |
5 |
7 |
An element for a table. |
| table foot element |
11 |
4 |
An element for a group of footer rows in a table. |
| table head element |
11 |
4 |
An element for a group of header rows in a table. |
| table header element |
5 |
7 |
An element for a header in a table. |
| table row element |
5 |
7 |
An element for the row of a table. |
| tag |
2 |
9 |
Markers to show the beginning and ending of an element. |
| tag name |
2 |
9 |
The characters used in a tag for a particular element. |
| text-align property |
4 |
10 |
A property to align text, with values such as left, right, center, and justify. |
| text-decoration property |
4 |
10 |
A property to specify decoration to text, with values such as underline, line-through, and overline. |
| text-indent property |
4 |
10 |
A property to specify how much text should be indented, with values given as sizes. |
| text-transform property |
4 |
10 |
A property to set cases, with values such as none, capitalize, uppercase, and lowercase. |
| title element |
2 |
11 |
An element that appears in the head element. The text is used for search and display. |
| top property |
8 |
1 |
A property indicating the position with respect to the top of the page, with values given as numbers. |
| tree |
2 |
2 |
A way of representing the structure of information. |
| type attribute |
9 |
2 |
An attribute of an input element specifying what type of control it is (values include text, reset, password, checkbox, radio, button, and submit). |
| Uniform Resource Locator |
3 |
2 |
A way of specifying a web page for a link. |
| unordered list element |
5 |
2 |
An element for an unordered list. |
| URL |
3 |
2 |
A way of specifying a web page for a link. |
| value |
4 |
1 |
The specific style for a property (CSS) or for an attribute (HTML). |
| value input attribute |
9 |
2 |
An attribute of an input element specifying information depending on the type of input, such as text for a button or a value used by JavaScript for a checkbox. |
| value list attribute |
11 |
2 |
An attribute of a list item that specifies the number for that item. |
| value of an attribute |
3 |
1 |
Specific information for an attribute. |
| value option attribute |
9 |
5 |
An attribute of an option to specify a value to be used by JavaScript. |
| visibility property |
6 |
2 |
A property that controls the visibility of content, with values visible and hidden. |
| void element |
2 |
18 |
An element specified using a single tag. |
| width attribute |
3 |
2 |
An attribute specifying the width, such as of an image. |
| width property |
6 |
4 |
A property that gives the width of the content, with values given as sizes. |
| word-spacing property |
4 |
10 |
A property to specify the amount of space between words, with values given as sizes. |
