setMutationHandler

MutationObserver wrapper to wait for the specified CSS selector

当前为 2017-02-11 提交的版本，查看最新版本。

此脚本不应直接安装，它是供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.greasyforks.org/scripts/12228/174471/setMutationHandler.js

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作者: woxxom
版本: 3.0.0
创建于: 2015-09-05
更新于: 2017-02-11
大小: 3.1 KB
许可证: 暂无

A MutationObserver wrapper to wait for an element (or elements) with the specified CSS selector.

First, load the function in your script metablock:

..............
// @require       https://greasyforks.org/scripts/12228/code/setMutationHandler.js
..............
// ==/UserScript==

Watch for added nodes:

setMutationHandler(document, '.container p.some-selector', function(nodes) {
    nodes.forEach(function(node) {
        node.style.display = 'none';
    });
    return false; // stop observing 
});

The observation target parameter may be omitted so "document" will be used by default:
```
setMutationHandler('.container p.some-selector', function(nodes) { ...... });
```
Process existing elements and set a mutation handler for the future ones
```
processExistingAndSetMutationHandler('a', processLinks);
```

Watch for added nodes only inside the specified container element that already exists in the document:

setMutationHandler(document.querySelector('.container-selector'), '.some-selector', function(nodes) {
    nodes.forEach(function(node) {
        node.style.display = 'none';
    });
    return false; // stop observing 
});

Advanced example with customized options to watch for changes in the title attribute:

setMutationHandler(document, '.some-selector', processNodes, {
    attributes: true, attributeFilter: ['title'],
    subtree: true
});
function processNodes(nodes) {
    console.log(nodes);
    //return false; // stop observing 
});

Make your userscript run at document-start to catch the mutations during page load:

..............
// @run-at        document-start
// @require       https://greasyforks.org/scripts/12228/code/setMutationHandler.js
..............
// ==/UserScript==