Презентация Module 7: Accessing DOM with JavaScript онлайн

На нашем сайте вы можете скачать и просмотреть онлайн доклад-презентацию на тему Module 7: Accessing DOM with JavaScript абсолютно бесплатно. Урок-презентация на эту тему содержит всего 33 слайда. Все материалы созданы в программе PowerPoint и имеют формат ppt или же pptx. Материалы и темы для презентаций взяты из открытых источников и загружены их авторами, за качество и достоверность информации в них администрация сайта не отвечает, все права принадлежат их создателям. Если вы нашли то, что искали, отблагодарите авторов - поделитесь ссылкой в социальных сетях, а наш сайт добавьте в закладки.
Презентации » Устройства и комплектующие » Module 7: Accessing DOM with JavaScript


Оцените!
Оцените презентацию от 1 до 5 баллов!
Смотреть онлайн
Скачать
  • Тип файла:
    ppt / pptx (powerpoint)
  • Всего слайдов:
    33 слайда
  • Для класса:
    1,2,3,4,5,6,7,8,9,10,11
  • Размер файла:
    377.10 kB
  • Просмотров:
    61
  • Скачиваний:
    0
  • Автор:
    неизвестен


Слайды и текст к этой презентации:

№1 слайд
Module Accessing DOM with
Содержание слайда: Module 7: Accessing DOM with JavaScript
№2 слайд
Agenda Introducing DOM
Содержание слайда: Agenda Introducing DOM Manipulating DOM with JavaScript Cookies and Storages Useful links
№3 слайд
Introducing DOM
Содержание слайда: Introducing DOM
№4 слайд
What is quot DOM quot ? DOM
Содержание слайда: What is "DOM"? DOM – an acronym for Document Object Model. It's an interface that provides browser to allow scripts on a webpage to dynamically access and update the content, structure and style of documents. When browser prepares webpage to be shown to user, it constructs tree of objects from all elements of a page according to it's HTML structure JavaScript code can access the tree and modify it, browser reacts on changes and updates HTML page shown to the user. Changing HTML with JavaScript using DOM interface is also called as Dynamic HTML.
№5 слайд
DOM Tree
Содержание слайда: DOM Tree
№6 слайд
What DOM Defines?
Содержание слайда: What DOM Defines?
№7 слайд
What can do JavaScript with
Содержание слайда: What can do JavaScript with DOM?
№8 слайд
Manipulating DOM with
Содержание слайда: Manipulating DOM with JavaScript
№9 слайд
Finding Elements
Содержание слайда: Finding Elements
№10 слайд
Finding HTML Elements by id
Содержание слайда: Finding HTML Elements by id var t = document.getElementById('target'); Will find one element with id "target"
№11 слайд
Finding HTML Elements by Tag
Содержание слайда: Finding HTML Elements by Tag Name var p = document.getElementsByTagName('p'); Will find all paragraphs on a page
№12 слайд
Finding HTML Elements by
Содержание слайда: Finding HTML Elements by Class Name var p = document.getElementsByClassName('target'); Will find all elements with class 'target' on a page
№13 слайд
Changing HTML
Содержание слайда: Changing HTML
№14 слайд
Changing HTML Content
Содержание слайда: Changing HTML Content document.getElementById(id).innerHTML = New value Will replace inner content of an element
№15 слайд
Changing the Value of an
Содержание слайда: Changing the Value of an Attribute document.getElementById(id).attribute = New value Will replace inner content of an element
№16 слайд
Changing HTML Style
Содержание слайда: Changing HTML Style document.getElementById(id).style.property = New value Will replace inner content of an element
№17 слайд
Using Events A JavaScript can
Содержание слайда: Using Events A JavaScript can be executed when an event occurs, examples of HTML events: When a user clicks the mouse When a user strokes a key When a web page has loaded When an image has been loaded When the mouse moves over an element When an input field is changed When an HTML form is submitted
№18 слайд
Sample onclick Event Handler
Содержание слайда: Sample onclick() Event Handler
№19 слайд
Cookies and Storages
Содержание слайда: Cookies and Storages
№20 слайд
What are Cookies? Cookies are
Содержание слайда: What are Cookies? Cookies are data, stored in small text files, on client computer. There is a problem: when a web server has sent a web page to a browser, the connection is shut down, and the server forgets everything about the user. Cookies were invented to solve the problem: When a user visits a web page, his ID can be stored in a cookie. Next time the user visits the page, the cookie "remembers" his ID
№21 слайд
Create a Cookie with
Содержание слайда: Create a Cookie with JavaScript JavaScript can create, read, and delete cookies with the document.cookie property. A cookie can be created like this: document.cookie = "ID=123456789"; To save the cookie between browser sessions, we may add expiry date: document.cookie = "ID=123456789; expires=Wed, 01 Jul 2015 12:00:00 GMT"; By default, cookie belongs to the page that created it, path parameter allows to set what path the cookie belong to: document.cookie = "ID=123456789; expires=Wed, 01 Jul 2015 12:00:00 GMT; path=/";
№22 слайд
Read a Cookie To read a
Содержание слайда: Read a Cookie To read a cookie: var x = document.cookie; This code will return all cookies in one string in name=value pairs To find the value of one specified cookie, we must write a JavaScript function that searches for the cookie value in the cookie string.
№23 слайд
Changing and Deleting Cookie
Содержание слайда: Changing and Deleting Cookie Changing cookie is made same way as creating it: document.cookie = "ID=123456789; expires=Wed, 01 Jul 2015 12:00:00 GMT; path=/"; To delete a cookie we have to set expires parameter to a passed date: document.cookie = "ID=123456789; expires=Thu, 01 Jan 1970 00:00:00 GMT";
№24 слайд
Sample Function to Set a
Содержание слайда: Sample Function to Set a Cookie The parameters of the function above are the name of the cookie (cname), the value of the cookie (cvalue), and the number of days until the cookie should expire (exdays). The function sets a cookie by adding together the cookiename, the cookie value, and the expires string.
№25 слайд
Sample Function to Get a
Содержание слайда: Sample Function to Get a Cookie Take the cookiename as parameter (cname). Create a variable (name) with the text to search for (cname + '='). Split document.cookie on semicolons into an array called ca (ca = document.cookie.split(';')). Loop through the ca array (i=0;i<ca.length;i++), and read out each value trimmed (c=ca[i].trim()). If the cookie is found (c.indexOf(name) == 0), return the value of the cookie (c.substring(name.length,c.length). If the cookie is not found, return ''.
№26 слайд
HTML Web Storage With HTML ,
Содержание слайда: HTML5 Web Storage With HTML5, web pages can store data locally within the user's browser alternatively to cookies. Web Storage is more secure and faster. The data is not included with every server request, but used only when asked for. The data is stored in name/value pairs, and a web page can only access data stored by itself. Unlike cookies, the storage limit is far larger (at least 5MB) and information is never transferred to the server.
№27 слайд
HTML Web Storage Objects
Содержание слайда: HTML5 Web Storage Objects
№28 слайд
Initial Check Before using
Содержание слайда: Initial Check Before using web storage, check browser support for localStorage and sessionStorage:
№29 слайд
Using Storage Objects There
Содержание слайда: Using Storage Objects There are methods to use storage objects: .setItem() – writes data .getItem() – reads data Methods are identical for localStorage and sessionStorage
№30 слайд
Sample Use of localStorage
Содержание слайда: Sample Use of localStorage
№31 слайд
Useful links
Содержание слайда: Useful links
№32 слайд
Useful Links HTML DOM на сайт
Содержание слайда: Useful Links HTML DOM на сайті Wikipedia: http://en.wikipedia.org/wiki/Document_Object_Model W3Schools JavaScript HTML DOM: http://www.w3schools.com/js/js_htmldom.asp Специфікація HTML DOM на сайті W3C: http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/
№33 слайд
Thank you!
Содержание слайда: Thank you!
Скачать все slide презентации Module 7: Accessing DOM with JavaScript одним архивом:
Скачать
Похожие презентации