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Level 21

AS 1.3.4 - Web Technologies


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HyperText Markup Language
the language / script that web pages are written in, which describes the content and structure of it
Cascading Style Sheets
the language which is used with HTML, in order to change the style and format of the webpage (rather than its content)
tags
What is HTML made up of, which are written between <>, which are usually in opening and closing pairs?
head
this part of a HTML file will contain the title of the webpage, and any other script that may enrich the page content
body
this part of a HTML file contains the main content of the page
<html></html>
(HTML) all code enclosed within these tags is interpreted as HTML
<head></head>
(HTML) defines the browser tab or window heading area
<body></body>
(HTML) defines the content in the main browser content area
<title></title>
(HTML) defines the text that appears in a tab or window heading area as the title of the page
<h1>
(HTML) largest heading style
<h6>
(HTML) smallest heading style
<p></p>
(HTML) creates a paragraph with a line space above and below it
<img>
(HTML) places an image within the webpage, using the src attribute, and is self closing
src=""
attribute which specifies the URL or file path to a file to be used; often used in the <img> tag
alt=""
attribute to specify the text that should be displayed if the specified image cannot be displayed; used within an <img> tag
height=""
attribute to specify the height of an element; used within an <img> tag
width=""
attribute to specify the width of an element; used within an <img> tag
<a></a>
(HTML) creates a hyperlink by using the href attribute
href=""
attribute which specifies the URL or file path to a file that a link is to be created to; used with the <a> tag or <link> tag
<ol></ol>
(HTML) defines a numbered / ordered list
<ul></ul>
(HTML) defines a bulleted / unordered list
<li></li>
(HTML) creates a list item within either a <ol> or <ul>
<div></div>
(HTML) allows for the division of a webpage into separate areas, which could be styled differently by CSS
<form></form>
(HTML) creates a form element in the webpage, which will then hold content such as inputs
<input />
(HTML) creates an input element within a <form>
type="text"
attribute to specify that the form input is a textbox
type="submit"
attribute to specify that the form input is a submit button
internal CSS
when CSS is added into a HTML file between <style></style> tags in the head
inline CSS
when CSS is added directly into HTML tags within the body, ie. <img style="height:200px;">
external style sheet
when CSS is linked to the HTML file, by the HTML file calling upon it using the <link></link> tags, which allows multiple pages to all reference the same style sheet, thus keeping the formatting consistent
rel="stylesheet"
attribute to specify the relationship of a file to the HTML file, in this case, as a stylesheet; used within the <link> tag
type="text/css"
attribute to specify that the external style sheet is a CSS file; used within a <link> tag
identifier
created in HTML using the id="" attribute, it is a unique selector, and can be referenced in CSS using a #
class
created in HTML using the class="" attribute, it can be used on multiple elements within a webpage, and can be reference in CSS using a .
background-color
(CSS) defines the colour of the background of the element
border-color
(CSS) defines the colour of a border
border-style
(CSS) defines the style of a border, e.g. solid, dotted or dashed
border-width
(CSS) defines the width of a border
color
(CSS) defines the text colour of different elements, and can be specified using a HEX value, e.g. #FFFFFF, or a named colour, e.g. blue
font-family
(CSS) defines the font for text in an element
font-style
(CSS) defines the style of the text in an element, e.g, bold, underlined or italic
font-size
(CSS) defines the size of text in an element
height
(CSS) defines the height of an element, such as an image
width
(CSS) defines the width of an element, such as an image
JavaScript
a script language that is used to add interactivity to websites
interpreted
as JavaScript needs to be translated into the object code for whichever computer it is running on, it is not compiled and instead is ...
validated
Advantage of processing input data before posted to server: the input data can be ... by the local computer to correct any errors
input data
Advantage of processing input data before posted to server: a busy server does not then also have to process the ...
<script></script>
(HTML) JavaScript is added inline to a HTML document within these tags
document.getElementById("")
(JavaScript) references a HTML element within the document by using its ID
.innerHTML
(JavaScript) changes the HTML within the tags of the element specified before this attribute
document.write("");
(JavaScript) writes directly to the HTML document
alert("");
(JavaScript) creates an alert box to give an output to the user
var
(JavaScript) declares a variable by using this command followed by the variable name and value
for () {}
(JavaScript) for loop
while () {}
(JavaScript) while loop
if () {}
(JavaScript) if selector
switch(x) {case 0:}
(JavaScript) switch case selector
/* comment */
(JavaScript) multi-line comment
// comment
(JavaScript) single line comment
.substring(1, 3)
(JavaScript) manipulates a string specified before this attribute, by cutting it to only the characters at index positions 1-3
function name() {}
(JavaScript) creates a function called name with no parameters
var names = new Array();
(JavaScript) creates an empty array called names
names[0]
(JavaScript) references the item in the array called names at index position 0
var items = ["one", "two", "three"]
(JavaScript) creates a pre-populated array called items with the data items "one", "two" and "three"
console.log()
(JavaScript) prints something in the console
.style.color
(JavaScript) references the CSS property 'colour' within the style attribute of an element which is specified before this JavaScript attribute