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JS - 如何获取内部样式元素的内容( <style>…</style)

[英]JS - how to get content of internal style element (<style>…</style)

by internal style I mean我的意思是内部风格

<style>
#div
{color:red;}
</style>

document.getElementsByTagName('style').innerHTML is not working... document.styleSheets either. document.getElementsByTagName('style').innerHTML 不工作...... document.styleSheets 也是。

document.getElementsByTagName returns Array of Elements document.getElementsByTagName返回元素数组

so you need to access it with index所以你需要用index访问它

document.getElementsByTagName('style')[0].innerHTML

document.styleSheets is much useful if you want to get specific selector or modify something from style sheet如果您想获取特定选择器或从样式表修改某些内容, document.styleSheets非常有用

Example例子

var styleSheet = document.styleSheets[1]; 
// assuming second one is embedded style, 
// since document.styleSheets also shows linked style sheets (like <link heref=".. >)

for (var i = 0; i < styleSheet.rules.length; i++) {
    // if you are looking for selector '.main'
    if (styleSheet.rules[i].selectorText === '.main') {
        // get background color
        var oldBg = styleSheet.rules[i].style.backgroundColor;

        // set background color
        styleSheet.rules[i].style.backgroundColor = '#ddd';
    }    
}

document.styleSheets is an array , for each of the style definition in your page . document.styleSheets是一个数组,用于页面中的每个样式定义。 Iterate for each of the style elements and find the rules defined.迭代每个样式元素并找到定义的规则。

document.styleSheets[0].rules

This is again an array.这又是一个数组。 so iterate .所以迭代。 The rule text for each of the rules can be extracted as follows每个规则的规则文本可以提取如下

document.styleSheets[indexofstyleelement].rules[indexofrule].cssText

document.styleSheets[0].rules[0].cssText gives rule text for first of the rules defined inside first style element document.styleSheets[0].rules[0].cssText给出第一个样式元素中定义的第一个规则的规则文本

<!DOCTYPE html>
<html>
<head>
<style>
  #div {
    color: red;
  }
</style>
</head>

<body>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
  function myFunction() {
    var x = document.getElementsByTagName("STYLE")[1];
    document.getElementById("demo").innerHTML = x.innerHTML;
  }
</script>

</body>
</html>

https://jsfiddle.net/mediaguru/xt9mkncx/ https://jsfiddle.net/mediaguru/xt9mkncx/

using jquery use this使用 jquery 使用这个

var x = $('style').html();

using javascript使用 JavaScript

var x=document.getElementById("home");

var y = x.firstChild.innerHTML;

Ahh I'm so stupid..啊啊啊我好笨啊。。

for (var i = 0; i < styles_length; i++)
{// I had:
// styles.innerHTML;
// not correct:
styles[i].innerHTML;
}

All answers by @Jag, @ABHIJITH GM, @mediaguru, @hardik are correct. @Jag、@ABHIJITH GM、@mediaguru、@hardik 的所有答案都是正确的。

Thank you guys!谢谢你们! And sorry for this newbie question... all day codding, my eyes are hurting, coffee time.很抱歉这个新手问题......整天编码,我的眼睛很痛,咖啡时间。

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