我正在尝试使用包含fabric.js版本2的JSPM创建一个javascript包。唉,执行jspm bundle失败了。
$ jspm bundle src/main --minify --inject
Building the bundle tree for src/main...
err Error on fetch for @empty/lib/jsdom/living/generated/utils.js at file:///Users/dkoerner/projects/JSPMFabricTestCase/@empty/lib/jsdom/living/generated/utils.js
Loading npm:[email protected]/dist/fabric.js
Loading npm:[email protected]
Loading src/bootstrap.js
Loading src/main.js
Error: ENOENT: no such file or directory, open '/Users/dkoerner/projects/JSPMFabricTestCase/@empty/lib/jsdom/living/generated/utils.js'
我在jspm和fabric示例之后创建了一个测试项目(https://github.com/dkoerner85/JSPMFabricTestCase),并验证了bundle创建是否适用于当前的fabric稳定版本v1.7.22。然而,将版本升级到候选版本v2.0.0-rc4会破坏捆绑。
我对javascript应用程序开发相当新,因此不明白为什么会失败以及如何修复它。我很感激任何指示或解释。
npm:v5.5.1节点:v8.9.3
在项目的package.json
中添加覆盖部分:
"overrides": {
"npm:[email protected]": {
"map": {
"canvas": "@empty",
"fs": "@empty",
"jsdom/lib/jsdom/living/generated/utils": "@empty",
"jsdom/lib/jsdom/utils": "@empty",
"jsdom": "@empty",
"http": "@empty",
"https": "@empty",
"xmldom": "@empty",
"url": "@empty"
}
}
}
在阅读了jspm和systemJS之后,我找到了解决这个问题的方法。关键代码位于结构包的fabric.js和package.json文件中。
DIST / fabric.js
...
fabric.document = require('jsdom').jsdom(decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'),{ features: {FetchExternalResources: ['img']}});
fabric.jsdomImplForWrapper = require('jsdom/lib/jsdom/living/generated/utils').implForWrapper;
fabric.nodeCanvas = require('jsdom/lib/jsdom/utils').Canvas;
fabric.window = fabric.document.defaultView;
DOMParser = require('xmldom').DOMParser;
...
的package.json
...
"browser" : {
"canvas": false,
"fs": false,
"jsdom": false,
"jsdom/lib/jsdom/living/generated/utils": false,
"jsdom/lib/jsdom/utils": false,
"http": false,
"https": false,
"xmldom": false,
"url": false
},
...
现在,在使用jspm install npm:[email protected]
安装软件包时,jspm将修改require语句,从而生成以下代码:
就是屏幕_packages/年排名/[email protected]如此.4/第三天/fabric.就是
...
fabric.document = require('@empty').jsdom(decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'), {features: {FetchExternalResources: ['img']}});
fabric.jsdomImplForWrapper = require('@empty/lib/jsdom/living/generated/utils').implForWrapper;
fabric.nodeCanvas = require('@empty/lib/jsdom/utils').Canvas;
fabric.window = fabric.document.defaultView;
DOMParser = require('@empty').DOMParser;
...
在尝试创建一个bundle时,jspm会偶然发现'@empty/lib/jsdom/living/generated/utils'
require语句。
Error: ENOENT: no such file or directory, open '/Users/dkoerner/projects/JSPMFabricTestCase/@empty/lib/jsdom/living/generated/utils.js'
jspm首先按照jsdom
的要求处理package.json
条目,从而无法识别更详细的条目'jsdom/lib/jsdom/living/generated/utils'
。有必要以正确的顺序提供地图 - 短路径之前的长路径。
这可以通过如上解决方案中描述的局部超控来实现。请注意,jsdom
在覆盖下方的@empty/lib/jsdom/living/generated/utils
下方订购,而不是原始的package.json
。