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我在 GoodReads 上的待读书架混合了已出版和未出版的书籍，因此很难找到已出版的书籍来阅读。我想我可以拼凑一个 GreaseMonkey 脚本来更改尚未出版的书籍的条目背景。
到目前为止，这是我整理的内容:
// ==UserScript==
// @name Unpublished Lowlighter
// @description Makes the background of books not yet published on the Goodreads to-read shelf grey.
// @include http://www.goodreads.com/*
// ==/UserScript==
function dateColor() {
var books = document.getElementsByClassName('bookalike review');
for (var book in books) {
var dateString = book
.getElementsByClassName('field date_pub')
.getElementsByClassName('value')
.textContent;
var date = new Date(dateString);
var today = new Date();
if (date > today) {
book.style.backgroundColor('Lightgrey');
}
}
}
dateColor();
问题是它不起作用。当我尝试在暂存器中运行脚本时，出现错误:Exception: book.getElementsByClassName is not a function
我的印象是 Firefox 支持 getElementsByClassName，您可以在 getElementsByClassName 的结果上运行它以获取子元素。我哪里错了？
编辑:这是表中一个 <tr> 的 HTML 片段。我一开始没有发布这个的原因是它真的很冗长:
<tr id="review_265364012" class="bookalike review">
<td class="field checkbox" style="display: none"><label>checkbox</label><div class="value"> <input id="checkbox_review_265364012" name="reviews[265364012]" value="265364012" type="checkbox">
</div></td> <td class="field position"><label>position</label><div class="value"> <div class="reorderControls">
<a class="actionLink" href="#" id="loading_link_434018960" method="post" onclick="$(this).hide(); $('loading_anim_434018960').show(); $('hidden_link_434018960').simulate('click');; return false;"><img alt="up" src="http://www.goodreads.com/assets/up_arrow-7957f2bae9c3456ec7359ad79b000652.gif" title="move book up"></a><img alt="Loading-trans" class="loading" id="loading_anim_434018960" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none"><a href="/shelf/move_up/174788201?redirect_url=%2Freview%2Flist%2F4111865%3Fformat%3Dhtml%26page%3D1%26shelf%3Dto-read" class="actionLink" data-method="post" id="hidden_link_434018960" rel="nofollow" style="display: none"><img alt="up" src="http://www.goodreads.com/assets/up_arrow-7957f2bae9c3456ec7359ad79b000652.gif" title="move book up"></a>
<img src="/assets/loading.gif" class="position_loading" style="display: none">
<input id="positions_174788201" name="positions[174788201]" value="5" type="text">
<script type="text/javascript">
//<![CDATA[
var newTip = new Tip($('positions_174788201'), " <nobr>\n <a class=\"button\" href=\"#\" onclick=\"savePositionChanges(4111865); return false;\">Save position changes<\/a> \n <a href=\"#\" onclick=\"$(\'positions_174788201\').prototip.hide(); return false;\">close<\/a>\n <\/nobr>\n", { style: 'creamy', stem: 'leftMiddle', hook: { tip: 'leftMiddle', target: 'rightMiddle' }, offset: { x: 5, y: 5 }, hideOn: 'imaginaryelement', showOn: 'click', width: 'auto', hideOthers: true });
$('positions_174788201').observe('prototip:shown', function() {
if (this.up('#box')) {
$$('div.prototip')[0].setStyle({zIndex: $('box').getStyle('z-index')});
} else {
$$('div.prototip')[0].setStyle({zIndex: 6000});
}
});
//]]>
</script> <a class="actionLink" href="#" id="loading_link_434206980" method="post" onclick="$(this).hide(); $('loading_anim_434206980').show(); $('hidden_link_434206980').simulate('click');; return false;"><img alt="down" src="http://www.goodreads.com/assets/down_arrow-61b0e7292c02b1dcfd3f75a7f9b6b7ad.gif" title="move book down"></a><img alt="Loading-trans" class="loading" id="loading_anim_434206980" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none"><a href="/shelf/move_down/174788201?redirect_url=%2Freview%2Flist%2F4111865%3Fformat%3Dhtml%26page%3D1%26shelf%3Dto-read" class="actionLink" data-method="post" id="hidden_link_434206980" rel="nofollow" style="display: none"><img alt="down" src="http://www.goodreads.com/assets/down_arrow-61b0e7292c02b1dcfd3f75a7f9b6b7ad.gif" title="move book down"></a>
</div>
</div></td> <td class="field cover"><label>cover</label><div class="value"> <a href="/book/show/12074927-the-fractal-prince"><img alt="The Fractal Prince (The Quantum Thief Trilogy #2)" src="http://photo.goodreads.com/books/1311105989s/12074927.jpg" title="The Fractal Prince (The Quantum Thief Trilogy #2)"></a>
</div></td> <td class="field title"><label>title</label><div class="value"> <a href="/book/show/12074927-the-fractal-prince" title="The Fractal Prince (The Quantum Thief Trilogy #2)">
The Fractal Prince
<span class="darkGreyText">(The Quantum Thief Trilogy #2)</span>
</a></div></td> <td class="field author"><label>author</label><div class="value"> <a href="/author/show/2768002.Hannu_Rajaniemi">Rajaniemi, Hannu</a>
</div></td> <td class="field isbn" style="display: none"><label>isbn</label><div class="value">
</div></td> <td class="field isbn13" style="display: none"><label>isbn13</label><div class="value">
</div></td> <td class="field asin" style="display: none"><label>asin</label><div class="value">
</div></td> <td class="field num_pages" style="display: none"><label>num pages</label><div class="value"> <span class="greyText">unknown</span>
</div></td> <td class="field avg_rating"><label>avg rating</label><div class="value"> 3.67
</div></td> <td class="field num_ratings" style="display: none"><label>num ratings</label><div class="value"> 9
</div></td> <td class="field date_pub"><label>date pub</label><div style="background: none repeat scroll 0% 0% Lightgrey;" class="value"> Sep 27, 2012
</div></td> <td class="field date_pub_edition" style="display: none"><label>date pub edition</label><div class="value"> <span class="greyText">unknown</span>
</div></td> <td class="field rating"><label>my rating</label><div class="value">
<span class="stars" id="stars12074927_4111865" onmouseout="mouseOutStars('12074927')"><a rel="nofollow"><img alt="didn't like it " class="star" id="star12074927_0" onclick="submitStars('12074927', 0, '/review/rate/12074927?rating=1', 4111865); return false;" onmouseover="checkStars('12074927', 0)" src="/assets/layout/gr_orange_star_inactive.png" title="didn't like it" height="15" width="15"></a><a rel="nofollow"><img alt="it was ok " class="star" id="star12074927_1" onclick="submitStars('12074927', 1, '/review/rate/12074927?rating=2', 4111865); return false;" onmouseover="checkStars('12074927', 1)" src="/assets/layout/gr_orange_star_inactive.png" title="it was ok" height="15" width="15"></a><a rel="nofollow"><img alt="liked it " class="star" id="star12074927_2" onclick="submitStars('12074927', 2, '/review/rate/12074927?rating=3', 4111865); return false;" onmouseover="checkStars('12074927', 2)" src="/assets/layout/gr_orange_star_inactive.png" title="liked it" height="15" width="15"></a><a rel="nofollow"><img alt="really liked it " class="star" id="star12074927_3" onclick="submitStars('12074927', 3, '/review/rate/12074927?rating=4', 4111865); return false;" onmouseover="checkStars('12074927', 3)" src="/assets/layout/gr_orange_star_inactive.png" title="really liked it" height="15" width="15"></a><a rel="nofollow"><img alt="it was amazing " class="star" id="star12074927_4" onclick="submitStars('12074927', 4, '/review/rate/12074927?rating=5', 4111865); return false;" onmouseover="checkStars('12074927', 4)" src="/assets/layout/gr_orange_star_inactive.png" title="it was amazing" height="15" width="15"></a></span><script language="javascript" type="text/javascript">starRatings[ratingIndex++] = [ '12074927', -1]; checkStars('12074927', -1);</script>
<span id="reviewMessage12074927_4111865"></span>
<span id="successMessage12074927_4111865"></span>
</div></td><td class="field shelves"><label>shelves</label><div class="value"> <span id="shelfList4111865_12074927"><span id="shelf_174788201"><a href="http://www.goodreads.com/review/list/4111865?shelf=to-read" class="shelfLink" title="View all books in Johan's to-read shelf.">to-read</a></span></span><br><a class="shelfChooserLink smallText" href="#" onclick="window.shelfChooser.summon(event, {bookId: 12074927, chosen: ["to-read"]}); return false;">[edit]</a>
</div></td><td class="field review" style="display: none"><label>review</label><div class="value"> <span class="greyText">None</span>
<a class="floatingBoxLink smallText" href="#" onclick="reviewEditor.summon(this, 12074927, 'review', {value: null}); return false;">[edit]</a>
<div class="clear"></div>
</div></td><td class="field notes" style="display: none"><label>notes</label><div class="value"> <span class="greyText">None</span>
<a class="floatingBoxLink smallText" href="#" onclick="reviewEditor.summon(this, 12074927, 'notes', {value: null}); return false;">[edit]</a>
</div></td><td class="field recommender" style="display: none"><label>recommender</label><div class="value"> <span class="greyText">none</span>
</div></td><td class="field comments" style="display: none"><label>comments</label><div class="value"> <a href="/review/show/265364012">0</a>
</div></td><td class="field votes" style="display: none"><label>votes</label><div class="value"> <a href="/rating/voters/265364012?resource_type=Review">0</a>
</div></td><td class="field read_count" style="display: none"><label># times read</label><div class="value"> 0
</div></td><td class="field date_started" style="display: none"><label>date started</label><div class="value"> <span class="greyText">not set</span>
<a class="floatingBoxLink smallText" href="#" onclick="reviewEditor.summon(this, 12074927, 'started_at', {value: null}); return false;">[edit]</a>
</div></td><td class="field date_read"><label>date read</label><div class="value"> <span class="greyText">not set</span>
<a class="floatingBoxLink smallText" href="#" onclick="reviewEditor.summon(this, 12074927, 'read_at', {value: null}); return false;">[edit]</a>
</div></td><td class="field date_added" style="display: none"><label>date added</label><div class="value"> <span title="January 21, 2012">
Jan 21, 2012
</span>
</div></td><td class="field date_purchased" style="display: none"><label>date purchased</label><div class="value"> <a class="smallText" href="#" id="add_for_date_purchased" onclick="new Ajax.Request('/review/update/12074927?format=json', {asynchronous:true, evalScripts:true, onFailure:function(request){Element.hide('loading_anim_206609');$('add_for_date_purchased').innerHTML = '<span class="error">ERROR</span>try again';$('add_for_date_purchased').show();}, onLoading:function(request){;Element.show('loading_anim_206609');Element.hide('add_for_date_purchased')}, onSuccess:function(request){Element.hide('loading_anim_206609');Element.show('add_for_date_purchased');var json = eval('(' + request.responseText + ')');$('review_265364012').replace(json.html);if (typeof(toggleFieldsToMatchHeader) == 'function') {toggleFieldsToMatchHeader();}}, parameters:'owned_book[book_id]=12074927&partial=bookalike&view=table' + '&authenticity_token=' + encodeURIComponent('J5JjYi/D31hPm9w3u8hM35umQTh8bK3md4dVzpi4eKQ=')}); return false;">(add)</a><img alt="Loading-trans" class="loading" id="loading_anim_206609" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none">
</div></td><td class="field owned" style="display: none"><label>owned</label><div class="value"></div></td><td class="field purchase_location" style="display: none"><label>purchase location</label><div class="value"> <a class="smallText" href="#" id="add_for_purchase_location" onclick="new Ajax.Request('/review/update/12074927?format=json', {asynchronous:true, evalScripts:true, onFailure:function(request){Element.hide('loading_anim_953979');$('add_for_purchase_location').innerHTML = '<span class="error">ERROR</span>try again';$('add_for_purchase_location').show();}, onLoading:function(request){;Element.show('loading_anim_953979');Element.hide('add_for_purchase_location')}, onSuccess:function(request){Element.hide('loading_anim_953979');Element.show('add_for_purchase_location');var json = eval('(' + request.responseText + ')');$('review_265364012').replace(json.html);if (typeof(toggleFieldsToMatchHeader) == 'function') {toggleFieldsToMatchHeader();}}, parameters:'owned_book[book_id]=12074927&partial=bookalike&view=table' + '&authenticity_token=' + encodeURIComponent('J5JjYi/D31hPm9w3u8hM35umQTh8bK3md4dVzpi4eKQ=')}); return false;">(add)</a><img alt="Loading-trans" class="loading" id="loading_anim_953979" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none">
</div></td><td class="field condition" style="display: none"><label>condition</label><div class="value"> <a class="smallText" href="#" id="add_for_condition" onclick="new Ajax.Request('/review/update/12074927?format=json', {asynchronous:true, evalScripts:true, onFailure:function(request){Element.hide('loading_anim_990684');$('add_for_condition').innerHTML = '<span class="error">ERROR</span>try again';$('add_for_condition').show();}, onLoading:function(request){;Element.show('loading_anim_990684');Element.hide('add_for_condition')}, onSuccess:function(request){Element.hide('loading_anim_990684');Element.show('add_for_condition');var json = eval('(' + request.responseText + ')');$('review_265364012').replace(json.html);if (typeof(toggleFieldsToMatchHeader) == 'function') {toggleFieldsToMatchHeader();}}, parameters:'owned_book[book_id]=12074927&partial=bookalike&view=table' + '&authenticity_token=' + encodeURIComponent('J5JjYi/D31hPm9w3u8hM35umQTh8bK3md4dVzpi4eKQ=')}); return false;">(add)</a><img alt="Loading-trans" class="loading" id="loading_anim_990684" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none">
</div></td><td class="field format"><label>format</label><div class="value"></div></td><td class="field actions"><label>actions</label><div class="value"> <div class="actionsWrapper greyText smallText">
<div class="editLinkWrapper"><a class="actionLinkLite editLink" href="#" id="loading_link_818479" onclick="new Ajax.Request('/review/edit/12074927', {asynchronous:true, evalScripts:true, onFailure:function(request){Element.hide('loading_anim_818479');$('loading_link_818479').innerHTML = '<span class="error">ERROR</span>try again';$('loading_link_818479').show();}, onLoading:function(request){;Element.show('loading_anim_818479');Element.hide('loading_link_818479')}, onSuccess:function(request){Element.hide('loading_anim_818479');Element.show('loading_link_818479');}, parameters:'authenticity_token=' + encodeURIComponent('J5JjYi/D31hPm9w3u8hM35umQTh8bK3md4dVzpi4eKQ=')}); return false;">edit</a><img alt="Loading-trans" class="loading" id="loading_anim_818479" src="http://www.goodreads.com/assets/loading-trans-3e04cd6ed6ad31063972e688820d7866.gif" style="display:none"></div>
<div class="viewLinkWrapper"><a href="/review/show/265364012" class="actionLinkLite viewLink nobreak">view »</a></div>
<a href="/review/destroy/12074927?return_url=http%3A%2F%2Fwww.goodreads.com%2Freview%2Flist%2F4111865%3Fshelf%3Dto-read" class="actionLinkLite smallText deleteLink" data-confirm="Are you sure you want to remove The Fractal Prince from your books? This will permanently remove this book from your shelves, including any review, rating, tags, or notes you have added. To change the shelf this book appears on please edit the shelves." data-method="post" rel="nofollow"> <img alt="Remove from my books" src="http://www.goodreads.com/assets/layout/delete.gif" title="Remove from my books">
<span class="label">remove book</span>
</a> </div>
</div></td>
</tr>
0
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