electron/spec/fixtures/pages/webview-custom-zoom-level.html

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<html>
<body>
<webview nodeintegration src="app://host1" id="view" partition="webview-temp"/>
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</body>
<script>
const {ipcRenderer, webFrame} = require('electron')
const view = document.getElementById('view')
let finalNavigation = false
view.addEventListener('dom-ready', () => {
if (!finalNavigation && !view.canGoBack()) {
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view.setZoomLevel(2.0)
}
const zoomLevel = view.getZoomLevel()
const zoomFactor = view.getZoomFactor()
ipcRenderer.send('webview-zoom-level', zoomLevel, zoomFactor, view.canGoBack(), finalNavigation)
if (!view.canGoBack() && !finalNavigation) {
view.src = 'app://host2'
} else if (!finalNavigation) {
finalNavigation = true
view.goBack()
}
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})
</script>
</html>