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JavaScript Guideline

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Some other important things to know when scripting with JavaScript.
A D V E R T I S E M E N T


JavaScript is Case Sensitive


In Java Script a function named "myfunction" is not the same as "myFunction" and a variable named "myVar" is not the same as "myvar".

Java Script is case sensitive - therefore watch your capitalization closely when we create or call variables, objects and functions.



White Space

Java Script ignores extra spaces. You can add white space to your script to make it more readable. The following lines are equivalent:

name="Hege"
name = "Hege"




Break up a Code Line

We can break up a code line within a text string with a backslash. The example given that will be displayed properly:


document.write("Hello \"
World!")


Comments

You can add comments to your script by using two slashes //:

//this is a comment
document.write("Hello World!")


or by using /* and */ (this creates a multi-line comment block):

/* This is a comment
block. It contains
several lines */
document.write("Hello World!")




Coding Guidelines

As a web developer, we often visited a website and wondered how a particular function or visual element was achieved, so we take a quick glance at the page�s source to provide a glimpse into the design. Often this involves scrolling through another developer�s esoteric Java Script code. While we should not expect another unknown developer to code so we can understand it; this should be the case when developers work for the same organisation. This issue was raised by a recent client, so the chore of constructing a Java Script standard was undertaken with the intent of it being followed by the development staff.


What should be standardised?

Tackling a task begins with the question of what should be standardised. The main goal of the Java Script gideline was to formulate guidelines that make possible the creation of readable code. Another task was to encourage adherence, but as a consultant, this was beyond my border.We first thought on adherence were that the resultant document should be considered guidelines rather than standards, because developers are a fastidious group who like to choose rather than be told.

The following items were pinpointed as general coding guidelines:

Naming conventions

Comments

Grammar

Parentheses

Spacing

Braces

Documentation


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