April 2018
Beginner
226 pages
4h 47m
English
Content preview from JavaScript and JSON Essentials - Second Edition
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The Hello World program with JSON
Now that we have a basic understanding of JSON, let us work on our Hello World program. This is shown in the snippet that follows:
<!DOCTYPE html><html> <head> <title>Test Javascript</title> <script type="text/javascript"> let hello_world = {"Hello":"World"}; alert(hello_world.Hello); </script> </head> <body> <h2>JSON Hello World</h2> <p>This is a test program to alert Hello world!</p> </body></html>
The preceding program will display Hello World on the screen when it is invoked from a browser.
We are using let, which is a new ecmascript identifier. It differs from the normal variable declaration identifier, var, with respect to scoping. The former is scoped to the nearest function block while the latter ...
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