通过用户脚本删除部分网站标题 [英] Remove part of title of website via userscript

问题描述

我尝试编写一个 userscript 代码，从网站(flash 浏览器游戏)的标题中删除所有内容，但倒计时开始操作时出现.

I try to code a userscript that removes everything from the title of a website (flash browsergame) but the countdown that appears when starting an action.

我是 JavaScript 新手，需要一些帮助.

I'm new to Javascript and need some help.

更新

正则表达式问题已解决，但我仍需要一些帮助才能让此脚本监视"标题，因此每次游戏更改时，脚本都会再次运行.

主标题如下所示:

摇晃&Fidget - 游戏(buffed buffed)

Shakes & Fidget - The Game (buffed buffed)

一旦开始一个动作，就会在开始处添加倒计时，因此标题更改为

As soon as an action is started a countdown is added to the beginning so the title changes to

02:26 - 摇晃 &Fidget - The Game (buffed buffed)

02:26 - Shakes & Fidget - The Game (buffed buffed)

我希望标题只显示倒计时.

I want the title to show the countdown only.

我在网上搜索并找到了不同的方法来做到这一点，但没有一个对我有用.

I searched the net and found different ways to do this but none of them works for me.

这是我目前拥有的:

// ==UserScript==
// @name       Shakes & Fidget Buffed title shortener
// @namespace  http://släcker.de
// @version    0.1
// @description  Removes the page title of Shakes & Fidget to only display left time if it exists
// @include        *.sfgame.*
// @exclude        www.sfgame.*
// @exclude        sfgame.*
// @copyright  2013+, slaecker
// ==/UserScript==

var regex = [^0-9:]

function cleanTitle() { 
    var oldTitle = document.title; 
    var oldTitleRX = oldTitle.match(regex);
    document.title = oldTitle.replace(oldTitleRX,""); 
    return oldTitle; 
} 


cleanTitle()

Javascript 控制台显示有关正则表达式的错误.我试图转义字符，但错误是相同的:

The Javascript console shows errors concerning the regex. I tried to escape the characters but the errors are the same:

env: ERROR: Syntax error @ 'Shakes & Fidget Buffed title shortener'!
Unexpected token ^
SyntaxError: Unexpected token ^
    at Window.Function (<anonymous>)
    at L (eval at <anonymous> (eval at <anonymous> (chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/content.js:51:21)), <anonymous>:156:21)
    at n (eval at <anonymous> (eval at <anonymous> (chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/content.js:51:21)), <anonymous>:384:2)
    at R (eval at <anonymous> (eval at <anonymous> (chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/content.js:51:21)), <anonymous>:388:86)
    at Q (eval at <anonymous> (eval at <anonymous> (chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/content.js:51:21)), <anonymous>:194:40)
Uncaught SyntaxError: Unexpected token ^
L
n
R
Q

它必须是正则表达式匹配，因为包含的字符串(buffed buffed)"发生了变化(它显示了服务器名称).

It has to be a regex match because the containing string "(buffed buffed)" changes (it shows the server name).

另一个问题是脚本应该监视"标题，因为它在每次开始或完成新操作时都会发生变化，但我的脚本只运行一次(在没有正则表达式的情况下进行了测试).

Another problem is that the script should "monitor" the title because it changes everytime a new action is started or finished but my script only runs once (tested it without regex).

预先感谢您的帮助，

懒人

推荐答案

对于正则表达式，使用:

For the regex, use:

document.title = document.title.replace (/[^0-9:]/g, "");

要检测标题更改，请使用 MutationObservers，这是一项新的 HTML5 功能在 Google Chrome 和 Firefox 中实现(两个主要的 userscripts 浏览器).

To detect title changes, use MutationObservers, a new HTML5 feature that is implemented in both Google Chrome and Firefox (The two main userscripts browsers).

这个完整的脚本会起作用:

// ==UserScript==
// @name        Shakes & Fidget Buffed title shortener
// @namespace   http://släcker.de
// @version     0.1
// @description  Removes the page title of Shakes & Fidget to only display left time if it exists
// @include     *.sfgame.*
// @exclude     www.sfgame.*
// @exclude     sfgame.*
// @copyright   2013+, slaecker, Stack Overflow
// @grant       GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
    introduced in GM 1.0.   It restores the sandbox.
*/

var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
var myObserver       = new MutationObserver (titleChangeDetector);
var obsConfig        = {
    //-- Subtree needed.
    childList: true, characterData: true, subtree: true
};

myObserver.observe (document, obsConfig);

function titleChangeHandler () {
    this.weInitiatedChange      = this.weInitiatedChange || false;
    if (this.weInitiatedChange) {
        this.weInitiatedChange  = false;
        //-- No further action needed
    }
    else {
        this.weInitiatedChange  = true;
        document.title = document.title.replace (/[^0-9:]/g, "");
    }
}

function titleChangeDetector (mutationRecords) {

    mutationRecords.forEach ( function (mutation) {
        //-- Sensible, Firefox
        if (    mutation.type                       == "childList"
            &&  mutation.target.nodeName            == "TITLE"
        ) {
            titleChangeHandler ();
        }
        //-- WTF, Chrome
        else if (mutation.type                      == "characterData"
            &&  mutation.target.parentNode.nodeName == "TITLE"
        ) {
            titleChangeHandler ();
        }
    } );
}

//-- Probably best to wait for first title change, but uncomment the next line if desired.
//titleChangeHandler ();

<小时>

如果您使用的是其他浏览器(在问题中说明)，则回退到使用 setInterval().

这篇关于通过用户脚本删除部分网站标题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！