javascript require不能在html内运行 [英] javascript require doesn't work inside html
问题描述
我正在编写涉及js代码的html代码.下面是一个简单的示例:
I'm writing html code that involves js code. Below a simple example:
<!DOCTYPE html PUBLIC >
<html>
<body>
<h2>Use JavaScript to Change Text</h2>
<p>This example writes "Hello JavaScript!" into an HTML element with id="demo":</p>
<p id="demo"></p>
<script>
var net = require('net');
var sleep = require('sleep');
var element = document.getElementById("demo");
element.innerHTML = "Hello JavaScript!";
sleep(1)
</script>
很不幸，您好，JavaScript！"当我使用浏览器浏览上述文件时，没有出现.在调试控制台中查看以下消息:
Unfortunately "Hello JavaScript!" doesn't appear when I browse the above file with my browser. Looking inside the debug console I can see the folowing message:
ReferenceError: require is not defined
因此，似乎require并未在html代码中定义，但是我编写了一个小的test.js文件，如下所示:
So it seems that require is not defined inside the html code but I've written a small test.js file as below:
var net = require('net');
var sleep = require('sleep');
sleep.sleep(1)
然后我用
node test.js.
没有错误，一切正常，要求可用，并且睡眠和上网也是如此.为什么html文件中的代码不起作用?
No errors, everything works fine, require is available and sleep and net as well. Why the code inside html file doesn't work?
推荐答案
Javascript与node.js不同
require()不是JavaScript标准的一部分，浏览器不提供现成的支持，它是node.js模块系统.
Javascript is not the same as node.js
require() is not a part of JavaScript standard and is not supported by browsers out of the box, it is the node.js module system.
您可能需要直接包含模块；一些模块可能无法在浏览器沙箱上下文中使用.
You might need to directly include the modules; some of the modules might not work in the browser sandbox context.
此外，诸如 http://browserify.org/之类的工具可能会有用.
Also, tools such as http://browserify.org/ might be useful.
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