Intercept URL before unload with javascript or jquery -


i'm writing simple chrome plugin intercept new url before page unload , if contains specific string want actions , invalidate redirect! have no idea how do.. can me?

you can use onbeforerequest event of webrequest api chrome extensions:

chrome.webrequest.onbeforerequest.addlistener(     function(details) {          // actions         // ...         return {cancel: true};      },     // block requests matching url     {urls: ["*://www.evil.com/*"]},     ["blocking"] );

just make sure have right permissions in manifest.json file:

you must declare "webrequest" permission in extension manifest use web request api, along host permissions hosts network requests want access. 

"permissions": [     "webrequest",     "webrequestblocking",     "*://*.google.com" ],

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