How to use seajs to write convention in require

This time I will show you how to use seajs to write conventions in require, and what are the precautions for using seajs to write conventions in require. The following is a practical case. Let’s take a look. .

require Writing Conventions

When writing module code using Sea.js, you need to follow some simple rules.

It’s just a specification for writing and debugging! ! ! The built code does not need to follow the following conventions at all! ! ! ! ! !

1. Correct spelling

The first parameter of module factory Construction methodmust Name it require .

// 错误！
define(function(req) {
 // ...
});
// 正确！
define(function(require) {
 // ...
});

2. Do not modify the

Do not rename the require function, or rename the require in any scope Assignment.

// 错误 - 重命名 "require"！
var req = require, mod = req("./mod");
// 错误 - 重定义 "require"!
require = function() {};
// 错误 - 重定义 "require" 为函数参数！
function F(require) {}
// 错误 - 在内嵌作用域内重定义了 "require"！
function F() {
 var require = function() {};
}

3. Use direct quantities

require The parameter value of must be a string direct quantity.

// 错误！
require(myModule);
// 错误！
require("my-" + "module");
// 错误！
require("MY-MODULE".toLowerCase());
// 正确！
require("my-module");

When writing module code, you must follow these rules. In fact, just think of require as a grammatical keyword.

About dynamic dependencies

Sometimes you hope to use require for conditional loading:

if (todayIsWeekend)
 require("play");
else
 require("work");

I believe you have read the case in this article You have mastered the method. For more exciting information, please pay attention to other related articles on the php Chinese website!

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