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javascript.go
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javascript.go
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package webpage
import (
"encoding/json"
"fmt"
"golang.org/x/net/html"
)
func (webpage *Webpage) addJavaScriptVariable(name, value string) {
webpage.Scripts = append(webpage.Scripts, Script{
Head: true,
Content: fmt.Sprintf(`
window.%s=%s;
`, name, value),
})
return
}
func (webpage *Webpage) AddJavaScriptVariable(name string, value interface{}) (err error) {
valueJson, err := json.Marshal(value)
if err != nil {
return err
}
webpage.addJavaScriptVariable(name, string(valueJson))
return
}
func (webpage *Webpage) AddJavaScriptRedirect(redirectURI string) {
webpage.Scripts = append(webpage.Scripts, Script{
Head: true,
Content: fmt.Sprintf(`
if (window && window.location && typeof window.location.assign === "function") {
window.location.assign("%s");
}
`, redirectURI),
})
}
func (webpage *Webpage) AddGA(gaID string) {
webpage.Scripts = append(webpage.Scripts, Script{
Src: fmt.Sprintf("https://www.googletagmanager.com/gtag/js?id=%s", gaID),
Attributes: []html.Attribute{{Key: "async"}},
})
webpage.Scripts = append(webpage.Scripts, Script{
Head: true,
Content: fmt.Sprintf(`
window.dataLayer = window.dataLayer || [];
function gtag() {
dataLayer.push(arguments);
}
gtag('js', new Date());
gtag('config', '%s');
`, gaID),
})
}
func (webpage *Webpage) AddGTM(gtmID string) {
webpage.Scripts = append(webpage.Scripts, Script{
Head: true,
Content: fmt.Sprintf(`
window.dataLayer = window.dataLayer || [];
(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','%s');
`, gtmID),
})
webpage.noscriptNode.AppendChild(&html.Node{
Type: html.ElementNode,
Data: "iframe",
Attr: []html.Attribute{{
Key: "src",
Val: fmt.Sprintf("https://www.googletagmanager.com/ns.html?id=%s", gtmID),
}, {
Key: "height",
Val: "0",
}, {
Key: "width",
Val: "0",
}, {
Key: "style",
Val: "display:none;visibility:hidden;",
}},
})
return
}