Question

我无法使用JSDOM（版本13.0.0）从具有相对路径的本地文件系统中加载脚本。

我看了以下问题，但它们没有回答我的问题：

jsdom can't load local html and javascript（我已经遵循了runScripts和resources的建议）。

文件foo.js：

var jsdom = require('jsdom')

var html = `<!DOCTYPE html>
<html>
  <head>
    <title>Test</title>
    <script src="bar.js"></script>
  </head>
  <body>
    <div>Test</div>
  </body>
</html>`

global.window = new jsdom.JSDOM(html, { runScripts: "dangerously", resources: "usable" }).window
console.log('foo')

文件bar.js：

console.log('bar')

这是我得到的错误：

$ node foo.js
foo
Error: Could not load script: "bar.js"
    at onErrorWrapped (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/resources/per-document-resource-loader.js:41:19)
    at Object.check (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/resources/resource-queue.js:72:23)
    at request.then.catch.err (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/resources/resource-queue.js:124:14)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:746:11)
    at startup (internal/bootstrap/node.js:240:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:564:3) Error: Tried to fetch invalid URL bar.js
    at ResourceLoader.fetch (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/resources/resource-loader.js:84:29)
    at PerDocumentResourceLoader.fetch (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/resources/per-document-resource-loader.js:16:42)
    at HTMLScriptElementImpl._fetchExternalScript (/Users/lone/so/node_modules/jsdom/lib/jsdom/living/nodes/HTMLScriptElement-impl.js:92:30)
    at HTMLScriptElementImpl._eval (/Users/lone/so/node_modules/jsdom/lib/jsdom/living/nodes/HTMLScriptElement-impl.js:161:12)
    at HTMLScriptElementImpl._poppedOffStackOfOpenElements (/Users/lone/so/node_modules/jsdom/lib/jsdom/living/nodes/HTMLScriptElement-impl.js:126:10)
    at OpenElementStack.pop (/Users/lone/so/node_modules/jsdom/lib/jsdom/browser/htmltodom.js:17:12)
    at Object.endTagInText [as END_TAG_TOKEN] (/Users/lone/so/node_modules/parse5/lib/parser/index.js:2153:20)
    at Parser._processToken (/Users/lone/so/node_modules/parse5/lib/parser/index.js:657:55)
    at Parser._processInputToken (/Users/lone/so/node_modules/parse5/lib/parser/index.js:684:18)
    at Parser._runParsingLoop (/Users/lone/so/node_modules/parse5/lib/parser/index.js:440:18)

在使用JSDOM时如何加载本地JavaScript文件？

Answer 1

JSDOM不知道执行时在本地查找该文件的位置。因此，运行示例可以遵循以下两种方法。

第一种方法

您必须等待脚本文件加载和执行。

在同一个文件夹中创建三个文件index.html,index.js and test.js。

index.html

<!doctype html>
<html>
  <head>
    <meta charset="UTF-8">
    <title></title>
  </head>
  <body>
    abc
    <script src='index.js'></script>
  </body>
</html>

index.js

document.body.textContent = 123;

test.js

'use strict';

const { JSDOM } = require('jsdom');

const options = {
  resources: 'usable',
  runScripts: 'dangerously',
};

JSDOM.fromFile('index.html', options).then((dom) => {
  console.log(dom.window.document.body.textContent.trim());

  setTimeout(() => {
    console.log(dom.window.document.body.textContent.trim());
  }, 5000);
});

 // console output
 // abc
 // 123

第二种方法 在JSDOM环境中设置外部脚本的基本根文件夹。

js / index.js

console.log('load from jsdom');
var loadFromJSDOM = 'load from jsdom';

test.js

'use strict';
const { JSDOM } = require('jsdom');
JSDOM.env({
        html: "<html><body></body></html>",
        documentRoot: __dirname + '/js',
        scripts: [
            'index.js'
        ]
    }, function (err, window) {
        console.log(window.loadFromJSDOM);
    }
);

从这些参考文献中阅读更多内容

https://github.com/jsdom/jsdom/issues/1867

jsdom.env: local jquery script doesn't work

如何使用JSDOM加载本地JavaScript文件？

1 个答案: