问题描述
我正在尝试使用预加载脚本解决.但是,我无法运行预加载脚本.一个最小的复制情况:
I'm trying to use a preload script to work around a CORS header issue in Electron 4.2.3. However, I can't get the preload script to run. A minimal reproduction case:
package.json
{
"name": "your-app",
"version": "0.1.0",
"main": "main.js",
"dependencies": {
"electron": "^4.2.3"
}
}
main.js
const { app, BrowserWindow } = require('electron')
app.on('ready', function() {
const win = new BrowserWindow({
webPreferences: {
preload: `file://${__dirname}/preload.js`,
}
})
win.webContents.openDevTools()
win.loadFile('index.html')
})
preload.js
window.preloadWasRun = 'preload was run'
index.html
<body>
<script>
document.write(window.preloadWasRun || 'preload was not run')
</script>
</body>
无论我为 webSecurity
, nodeIntegration
和 contextIsolation
使用什么设置,似乎我的 preload
脚本只是被忽略了.即使我在脚本中出现语法错误,也不会在任何地方显示任何错误.
No matter what settings I use for webSecurity
, nodeIntegration
and contextIsolation
, it seems that my preload
script is just getting ignored. Even if I make a syntax error in the script, it doesn't show any errors anywhere.
推荐答案
原来,它必须是绝对路径名,而不是绝对URL.这些都不起作用:
Turns out it has to be an absolute path name, not an absolute URL. None of these work:
preload: `file://${__dirname}/preload.js`,
preload: './preload.js',
preload: 'preload.js',
但这可以像宣传的那样工作:
But this works as advertised:
preload: `${__dirname}/preload.js`,
由于它似乎是文件系统路径而不是URL,所以使用 path.join
来解决具有奇怪的路径分隔符的平台也可能是明智的选择:
Since it seems to be a filesystem path rather than a URL, it might also be wise to use path.join
instead, to account for platforms with weird path separators:
preload: path.join(__dirname, 'preload.js'),
这篇关于为什么Electron不运行我的预加载脚本?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!