chromeworker/chromeproxy/background/capture.js

 
function Tell(backgroundType, content) {
    try {
        if (content == undefined) {
            chrome.runtime.sendMessage({ type: backgroundType });
        } else {
            chrome.runtime.sendMessage({ type: backgroundType, content: content });
        }
    } catch (error) {
        console.log(error);
        window.location.href = Host;
    }
}
 
try {
    if (condition == undefined) {
        condition = function () {
            return true;
        };
    }
} catch (error) {
    condition = function () {
        return true;
    };
}

var href = window.location.href;
var content = "";
if(document.contentType == "application/json") {
    content = document.documentElement.innerText;
} else {
    content = document.documentElement.innerHTML;
}

if (condition()) {
    Tell("content", content);
} else {
    Tell("notwant", content);
}