JavaScript Keyword This

var aThisTest = {
    prop: 66,
    func: function () {
    return aThisTest.prop;
},
};
 
alert(aThisTest.func());
// Output: 66

// In a web browser the global object is the same as the window object.
alert(this === window); // Result: true
 
count = 99;
alert(window.count); // Result: 99
 
this.testString = "Honneybag";
alert(window.testString )  // Result: "Honneybag"
alert(testString )                // Result: "Honneybag"

function TestThisFunction() {
    return this;
}
 
TestThisFunction() === window; // true: the result in a browswer
TestThisFunction() === global; // true: the result in node

function TestThisFunction() {
'use strict'; // see strict mode
    return this;
}
 
TestThisFunction() === undefined; // true

JavaScript is one of the 3 core language technologies of the World Wide Web that all web developers must learn:

1.      HTML to define the content of web pages.

2.      CSS to specify the layout of web pages.

3.      JavaScript to program the behavior of web pages.

JavaScript is a scripting or programming language that allows you to implement complex things on web pages. Every time a web page does more than just sit there and display static information for you to look at, displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. − you can bet that JavaScript is probably involved.

The benefits of using JavaScript are:

1.      You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.

2.      Immediate feedback to the visitors − They don't have to wait for a page reload to see if they have forgotten to enter something.

3.      Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.

4.      Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.

Need more Honney

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