Javascript 解析CSS背景图像和选择器
我需要解析一段CSS。例如:Javascript 解析CSS背景图像和选择器,javascript,css,regex,Javascript,Css,Regex,我需要解析一段CSS。例如: <style ...> .foo , #bar { /*some css code here*/ background-image: url(image.png); } p { background: url(image2.png) repeat-x; font-size: 1em; } a { font-size: 1.1em; } </style> 我有兴趣匹配url(图像),然后获取其选
<style ...>
.foo , #bar {
/*some css code here*/
background-image: url(image.png);
}
p {
background: url(image2.png) repeat-x;
font-size: 1em;
}
a {
font-size: 1.1em;
}
</style>
我有兴趣匹配url(图像),然后获取其选择器。使用
CSS
作语法分析
Javascript
var source = document.getElementById("source"),
ss,
parser,
sheet,
length1,
index1,
length2,
index2,
myArray,
cssRule,
declaration,
selector,
bg;
document.getElementById("parse").addEventListener("click", function () {
ss = source.value;
parser = new CSSParser();
sheet = parser.parse(ss, false, true);
if (sheet) {
myArray = [];
for (index1 = 0, length1 = sheet.cssRules.length; index1 < length1; index1 += 1) {
cssRule = sheet.cssRules[index1];
selector = cssRule.mSelectorText;
for (index2 = 0, length2 = cssRule.declarations.length; index2 < length2; index2 += 1) {
declaration = cssRule.declarations[index2];
if (declaration.property === "background-image") {
bg = declaration.valueText.match(/url\((\S+)\)/i)[1];
myArray.push({
"selector": selector,
"bg": bg
});
break
}
}
}
console.log(myArray);
}
});
var source=document.getElementById(“source”),
党卫军,,
解析器,
床单,
长度1,
index1,
长度2,
index2,
myArray,
cssRule,
宣言,
选择器,
bg;
document.getElementById(“解析”).addEventListener(“单击”),函数(){
ss=源值;
parser=new CSSParser();
sheet=parser.parse(ss,false,true);
若有(第页){
myArray=[];
对于(index1=0,length1=sheet.cssRules.length;index1
第二场比赛呢
regex.groups("selector") = "P"
regex.groups("image") = "image2.png"
或者,您可以使用正则表达式中的“image.png”来获取:
\n(?<selector>[^{]*?){(?<t>.+)(?<image>image.png)
你能指望有效的CSS样式表吗?或者你必须考虑所有的可能性?为什么不简单地去做呢?看看window.getComputedStyles Javascript方法。不完全是你想要的,但是你可以把它包装在一个修改过的函数中,其中包括选择器。。。
(?<selector>\n.*?)[^{}](\{.+?(?<=url\()(?<image>[^\)]*).+?\})
regex.groups("selector") = ".foo, #bar"
regex.groups("image") = "image.png"
regex.groups("selector") = "P"
regex.groups("image") = "image2.png"
\n(?<selector>[^{]*?){(?<t>.+)(?<image>image.png)
regex.groups("selector") = ".foo, #bar"