我有一个 PDF,我浏览了 PDFtoHTML创建一个我可以操作的 HTML 页面。我想根据单一颜色 rgb(0, 129, 162) 选择多个标题,因为这似乎是区分标题与文本其余部分的唯一可辨别方式。在应用颜色的 head 元素中有一个 style 元素将颜色应用于所有 span 和 div 元素。
span.cls_022{font-family:Arial,serif;font-size:11.1px;color:rgb(0, 129, 162);font-weight:normal;font-style:normal:text-decoration: none}
HTML 如下所示:
<div style="left: 72.02px; top: 204.98px; position: absolute">
<div class="cls_022" style="left: 72.02px; top: 204.98px; position:absolute;">
<span class="cls_022">Text I'd like to select</span>
</div>
</div>
现在,我可以选择并返回包含 span 的样式元素
document.getElementsByClassName("cls_022")[0].style.cssText
这将返回标签内的样式。
在开发工具中,我可以看到它具有 rgb(0, 129, 162) 的颜色属性,这就是我想用来选择和返回 CSS 颜色属性的值。
有什么想法吗?
最佳答案
这可以实现你想要的:
var elem = document.getElementsByClassName("cls_022")[1];
var cssColor = window.getComputedStyle(elem, null).getPropertyValue("color");
var targetElems = document.querySelectorAll("span.cls_022");
//targetElems.forEach(el => console.log(el));
//console.log(targetElems); //<--- If there are no spans with other color, and this is what you want, querySelectorAll return a NodeList.
let blueTitles = [];
targetElems.forEach(el => {
if(window.getComputedStyle(el, null).getPropertyValue("color") === 'rgb(0, 129, 162)') {
blueTitles.push(el);
}
});
//console.log(blueTitles); // <---- blueTitles is an array only contains spans with class "cls_022" and color rgb(0, 129, 162)
span.cls_022 {
font-family: Arial, serif;
font-size: 11.1px;
color: rgb(0, 129, 162);
font-weight: normal;
font-style: normal:text-decoration: none
}
span.red {
color: red;
}
<div style="left: 0px; top: 0px; position: absolute">
<div class="cls_022" style="left: 10px; top: 10px; position:absolute;">
<span class="cls_022">Text I'd like to select</span>
</div>
</div>
<div style="left: 0px; top: 100px; position: absolute">
<div class="cls_022" style="left: 10px; top: 10px; position:absolute;">
<span class="cls_022">Multiple headlines 1</span>
</div>
</div>
<div style="left: 0px; top: 200px; position: absolute">
<div class="cls_022" style="left: 10px; top: 10px; position:absolute;">
<span class="cls_022">Multiple headlines 2</span>
</div>
</div>
<div style="left: 0px; top: 300px; position: absolute">
<div class="cls_022" style="left: 10px; top: 10px; position:absolute; ">
<span class="cls_022 red">Multiple headlines 3</span>
</div>
</div>
关于javascript - 如何使用 Javascript 返回 CSS 颜色元素的值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49637017/