Javascript:javascript Style Wizard (end)

Order
Go on to the top two, this is the end of the article.
Blocks
? There is the code of {}, we wrap the line processing.
Bad
if (test)
return false;
Good
if (test) return false;
Good
if (test) {
return false;
}
Bad
function () {return false;}
Good
function () {
return false;
}
Comments
? Use/** for multiline annotations ... * *. Contains descriptive information, parameter types, and return values.
Bad
Make () returns a new element
Based on the passed in tag name
//
@param Tag
@return Element
function make (tag) {
... stuff ...
return element;
}
Good
/**
* Make () returns a new element
* Based on the passed in tag name
*
* @param Tag
* @return Element
*/
function make (tag) {
... stuff ...
return element;
}
? Use//For single-line comments. Single-line comments are placed on a single new line. Place a blank line before the comment.
Bad
var active = true; Is current tab
Good
Is current tab
var active = true;
Bad
function GetType () {
Console.log (' fetching type ... ');
Set the default type to ' no type '
var type = This._type ' no type ';
return type;
}
Good
function GetType () {
Console.log (' fetching type ... ');
Set the default type to ' no type '
var type = This._type ' no type ';
return type;
}
? For some questions, add fixme or Todo before the comment, which will quickly help developers understand the intent of the code quickly.
? Use//fixme: annotation Issue
function Calculator () {
Fixme:shouldn ' t use a global here
Total = 0;
return this;
}
? Use//TODO: annotation Solution for problem
function Calculator () {
Todo:total should be configurable by a options param
this.total = 0;
return this;
}
Type Casting & Coercion
? Performs a mandatory type conversion before the declaration.
? String
=> This.reviewscore = 9;
Bad
var totalscore = This.reviewscore + ';
Good
var totalscore = ' + This.reviewscore;
Bad
var totalscore = ' + This.reviewscore + ' total score ';
Good
var totalscore = This.reviewscore + ' total score ';
? For numeric conversions, use parseint, with the cardinality of the type conversion.
? If parseint becomes your bottleneck, in performance reasons, you need to use the "displacement" operation. Then write a note explaining why you did it.
var inputvalue = ' 4 ';
Bad
var val = new number (inputvalue);
Bad
var val = +inputvalue;
Bad
var val = inputvalue >> 0;
Bad
var val = parseint (Inputvalue);
Good
var val = number (inputvalue);
Good
var val = parseint (Inputvalue, 10);
Good
/**
* parseint makes my code slow.
* To increase speed, use the displacement operation to force the string to be converted to a number.
*/
var val = inputvalue >> 0;
? Boolean
var age = 0;
Bad
var hasage = new Boolean (age);
Good
var hasage = Boolean (age); This article links http://www.cxybl.com/html/wyzz/JavaScript_Ajax/20130710/39007.html