all .
Design principles:
1. Atomic idea: that is, each function does one thing;
2. Inductive idea: the same class 3. Easy to
maintain: it is convenient for later people to carry out quick maintenance;
4. Easy to expand: that is, different changes can be made according to each different project;
5. Common front-end design mode: some front-ends can be used universally 6. Pay attention to write comments well, and
write comments to specific points;
JavaScript code specifications
Code specifications usually include the following aspects:
naming rules for variables and functions
Space , indentation, rules for the use of comments
Other common specifications...
Specifications The code can be easier to read and maintain. The
code specification is generally stipulated before development, and can be set in consultation with your team members. Variable
names It is recommended to use camelCase for variable names: firstName = "John"; lastName = "Doe" ; Click and drag to move Prefix specification: Each local variable needs to have a type prefix, which can be divided into:
s: Represents a string. For example: sName, sHtml;
n: indicates a number. For example: nPage, nTotal;
b: represents logic. For example: bChecked, bHasLogin;
a: Represents an array. For example: aList, aGroup;
r: means regular expression. For example: rDomain, rEmail;
f: means function. For example: fGetHtml, fInit;
o: Indicates other objects not involved in the above, such as: oButton, oDate;
g: Indicates global variables, such as: gUserName, gLoginTime
Space and operator
Usually required before and after the operator ( = + - * / ) Add spaces:
var x = y + z; var values = ["Volvo", "Saab", "Fiat"];
Click and drag to move
Code indentation and line wrapping Indentation Use the same
indentation
on the same system Standard, this article advocates an indent size of 4 spaces. Each compiler defines the size of the blank space replaced by the Tab key differently. It is recommended to reset the Tab shortcut in the editor to 4 spaces when setting up the development environment. Most compilers provide this feature. Otherwise, it is recommended to indent by 4 spaces.
Line breaks must be broken
at the following positions:
after each independent statement;
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