Why does chrome.webRequest.OnBeforeRequest fire before chrome.webNavigation.onBeforeNavigate

[BenR]

Hopefully my question is simple. How can webRequest.onBeforeRequest know there is a request to receive before chrome.webNavigation.onBeforeNavigate has completed? Doesn't the browser need to at least query the web server to get any request at all?

Trying to understand this logically. Here is the very simple code:

window.Test = function (url) {

    chrome.tabs.create({ url: "" }, function (tab) {

        chrome.webNavigation.onBeforeNavigate.addListener(function (details) {

            console.log("chrome.webNavigation.onBeforeNavigate hit on " + details.timeStamp);

        });

        chrome.webRequest.onBeforeRequest.addListener(function (details) {

            console.log("chrome.webRequest.onBeforeRequest hit on " + details.timeStamp);

        }, {

            tabId: tab.id,

            urls: ["<all_urls>"]

        });

        chrome.tabs.update(tab.id, {

            url: url

        });

    });

};

Then if I hit a very simple site like www.steam.com, which has only two requests, I get this console response:

chrome.webRequest.onBeforeRequest hit on 1437083141916.896

chrome.webNavigation.onBeforeNavigate hit on 1437083141916.906

chrome.webRequest.onBeforeRequest hit on 1437083141940.385

Here is the manifest, if it's important

{

  "background": {

    "persistent": true,

    "scripts": [

      "temp.js"

    ]

  },

  "manifest_version": 2,

  "name": "Sharkbait",

  "permissions": [

    "<all_urls>",

    "webNavigation",

    "webRequest"

  ],

  "version": "1.0"

}

Many thanks,

Ben

[PhistucK]

Perhaps this is done to accommodate 204 responses. I think those cancel the navigation.

☆PhistucK

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