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![JSON vs XML: {"employees":[ { "firstName":"John", "lastName":"Doe" }, { "firstName":"Anna", "lastName":"Smith" }, { "firstName":"Peter", "lastName":"Jones" } ]} <employees> <employee> <firstName>John</firstName> <lastName>Doe</lastName> </employee> <employee> <firstName>Anna</firstName> <lastName>Smith</lastName> </employee> <employee> <firstName>Peter</firstName> <lastName>Jones</lastName> </employee> </employees> Both JSON and XML are "self describing" (human readable). Both JSON and XML are hierarchical (values within values). Both JSON and XML can be parsed and used by lots of programming languages. Both JSON and XML can be fetched with an XMLHttpRequest. JSON doesn't use end tag JSON is shorter JSON is quicker to read and write JSON can use arrays JSON vs XML JSON is Like XML](https://image.slidesharecdn.com/iwtclass-8-200721165112/75/Internet-and-Web-Technology-CLASS-8-jQuery-and-JSON-NIC-NIELIT-Web-Technology-10-2048.jpg)
![JSON Array: <!DOCTYPE html> <html> <body> <p>Looping through an array using a for in loop:</p> <p id="demo"></p> <script> var myObj, i, x = ""; myObj = { "name":"John", "age":30, "cars":[ "Ford", "BMW", "Fiat" ] }; for (i in myObj.cars) { x += myObj.cars[i] + "<br>"; } document.getElementById("demo").innerHTML = x; </script> </body> </html> <!DOCTYPE html> <html> <body> <p>Access an array value of a JSON object.</p> <p id="demo"></p> <script> var myObj, x; myObj = { "name":"John", "age":30, "cars":[ "Ford", "BMW", "Fiat" ] }; x = myObj.cars[0]; document.getElementById("demo").innerHTML = x; </script> </body> </html>](https://image.slidesharecdn.com/iwtclass-8-200721165112/75/Internet-and-Web-Technology-CLASS-8-jQuery-and-JSON-NIC-NIELIT-Web-Technology-12-2048.jpg)
Internet and Web Technology (CLASS-8) [jQuery and JSON] | NIC/NIELIT Web Technology
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- 2. IWT Syllabus: Module 3: XML Introductionto XML, XML vs HTML, Structures of a XML Document, Document Type Declaration (DTD), XML Validation, Well Formed XML Documents, Valid XML Document, XML DOM, XSL, XSL ransformation, XML Namespaces, XML Schema. AJAX AJAX Introduction, AJAX - The XMLHttpRequest Object, AJAX - Server Response, Ajax XML, Ajax Database jQuery jQuery DOM Selectors, HTML Content, jQuery CSS Styles, jQuery HTML DOM JSON Introduction, syntax, Data Types, Parsing, Stringify, Object, Arrays React.js Introduction, ES6, Render HTML, JSX, Components , props, state, Lifecycle, Events, forms, CSS
- 3. jQuery: jQuery isa small and lightweight JavaScript library. jQuery is cross-platform. jQuery means "write less do more". jQuery simplifies AJAX call and DOM manipulation.
- 4. jQuery HTML: <!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.1 1.3/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("p").html("Hello<b>Javatpoint.com</b>"); }); }); </script> </head> <body> <button>Click here to change the content of all p elements</button> <p>This is a paragraph.</p> <p>This is another paragraph.</p> </body> </html>
- 5. jQuery CSS: <!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery /1.11.3/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("p").css({"background-color":"yellow", "font-size": "100%"}); }); }); </script> </head> <body> <h2>This is a heading</h2> <p style="background-color:#ff0000">The background-color of this paragraph is red.</p> <p style="background-color:#00ff00">The background-color of this paragraph is green.</p> <p style="background-color:#0000ff">The background-color of this paragraph is blue.</p> <p>This paragraph has no background-color.</p> <button>Click here to set multiple styles for all selected elements.</button> </body> </html>
- 6. jQuery DOM: <html> <head> <title>The jQueryExample</title> <script type = "text/javascript" src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3 /jquery.min.js"> </script> <script type = "text/javascript" language = "javascript"> $(document).ready(function() { $("div").click(function () { $(this).before('<div class="div"></div>' ); }); }); </script> <style> .div{ margin:10px;padding:12px; border:2px solid #666; width:60px;} </style> </head> <body> <p>Click on any square below:</p> <span id = "result"> </span> <div class = "div" style = "background- color:blue;"></div> <div class = "div" style = "background- color:green;"></div> <div class = "div" style = "background- color:red;"></div> </body> </html>
- 7. jQuery Animate: <!DOCTYPE html> <html> <head> <scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("div").animate({ height: 'toggle' }); }); }); </script> </head> <body> <button>Start Animation</button> <div style="background:#98bf21;height:50%;width:50%;position:absolute;"></div> </body> </html>
- 8. JSON: JSON: JavaScriptObject Notation. JSON is a syntax for storing and exchanging data. JSON is text, written with JavaScript object notation. JSON is a lightweight data-interchange format JSON is "self-describing" and easy to understand
- 9. JSON Syntax: <!DOCTYPE html> <html> <body> <h2>CreateObject from JSON String</h2> <p id="demo"></p> <script> var txt = '{"name":"John", "age":30, "city":"New York"}' var obj = JSON.parse(txt); document.getElementById("demo").innerHTML = obj.name + ", " + obj.age; </script> </body> </html>
- 10. JSON vs XML: {"employees":[ {"firstName":"John", "lastName":"Doe" }, { "firstName":"Anna", "lastName":"Smith" }, { "firstName":"Peter", "lastName":"Jones" } ]} <employees> <employee> <firstName>John</firstName> <lastName>Doe</lastName> </employee> <employee> <firstName>Anna</firstName> <lastName>Smith</lastName> </employee> <employee> <firstName>Peter</firstName> <lastName>Jones</lastName> </employee> </employees> Both JSON and XML are "self describing" (human readable). Both JSON and XML are hierarchical (values within values). Both JSON and XML can be parsed and used by lots of programming languages. Both JSON and XML can be fetched with an XMLHttpRequest. JSON doesn't use end tag JSON is shorter JSON is quicker to read and write JSON can use arrays JSON vs XML JSON is Like XML
- 11. JSON.stringify(): A commonuse of JSON is to exchange data to/from a web server. When sending data to a web server, the data has to be a string. Convert a JavaScript object into a string with JSON.stringify() <!DOCTYPE html> <html> <body> <h2>Create JSON string from a JavaScript object.</h2> <p id="demo"></p> <script> var obj = { name: "John", age: 30, city: "New York" }; var myJSON = JSON.stringify(obj); document.getElementById("demo").innerHTML = myJSON; </script> </body> </html>
- 12. JSON Array: <!DOCTYPE html> <html> <body> <p>Loopingthrough an array using a for in loop:</p> <p id="demo"></p> <script> var myObj, i, x = ""; myObj = { "name":"John", "age":30, "cars":[ "Ford", "BMW", "Fiat" ] }; for (i in myObj.cars) { x += myObj.cars[i] + "<br>"; } document.getElementById("demo").innerHTML = x; </script> </body> </html> <!DOCTYPE html> <html> <body> <p>Access an array value of a JSON object.</p> <p id="demo"></p> <script> var myObj, x; myObj = { "name":"John", "age":30, "cars":[ "Ford", "BMW", "Fiat" ] }; x = myObj.cars[0]; document.getElementById("demo").innerHTML = x; </script> </body> </html>
- 13. Model Questions: 1. Howdo you round the number 7.25, to the nearest integer? (a) Math.round(7.25) (b) Math.rnd(7.25) (c) Math.rnd(7.25) (d) round(7.25) 2. How do you find the number with the highest value of x and y? (a) top(x, y) (b) ceil(x, y) (c) Math.ceil(x, y) (d) Math.max(x, y)
- 14. Model Questions: (Cont.) 3.Is JavaScript case-sensitive? (a) True (b) False 4. Which symbol is used in the beginning of jQuery code ? (a) ? (b) @ (c) $ (d) * 5. The correct syntax for a conditional statement to execute following code if “x” is NOT equal to 8? (a) if x =! 8 then (b) if (x<> 8) (c) if x<>8 then (d) if (x != 8)
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