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1.如下代码:
//b.js var counter = 3; module.exports = { counter: counter, incCounter: function() { console.log(counter); }, }; //a.js var mod = require('./b'); console.log(mod)//{counter: 3, incCounter: ƒ} mod.incCounter();//3 //编译后的一段代码 ([function(e, n) { e.exports = { counter: 3, incCounter: function() { console.log(3) } } }
//b.js module.exports = { counter: 3, incCounter: function() { console.log(counter); }, }; //a.js输出 {counter: 3, incCounter: ƒ} //counter is not defined,此处报错 //编译后的一段代码 ([function(e, n) { e.exports = { counter: 3, incCounter: function() { console.log(counter) } } }
首先我们要了解一个基本的事实
The text was updated successfully, but these errors were encountered:
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1.如下代码:
首先我们要了解一个基本的事实
无论打包过程如何,有依赖关系的文件都会生成一个文件,而生产环境,也没有什么打包关系了,就是我们很熟悉的html,css,js结构的代码。
打包的过程其实就相当于把一段代码编辑之后,插入到另一段代码中。
上面第二端代码之所以报错,就是因为编辑之后,counter并没有一个值。如果我们改成this.counter则不会报错
The text was updated successfully, but these errors were encountered: