How to use seajs to write convention in require

This time I will show you how to use seajs to write conventions inrequire, and what are theprecautionsfor 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 factoryConstruction methodmustName itrequire.

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

2. Do not modify the

Do not rename therequirefunction, or rename therequirein 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 ofmust be astringdirect 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 ofrequireas a grammatical keyword.

About dynamic dependencies

Sometimes you hope to userequirefor 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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