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[英]How to extract the source of images inside class div in html response react native
[英]How to extract the source of images inside class div in html string
我有用於在 html 字符串中提取圖像源的正則表達式,效果很好。 output 在 urls 數組中:
var m,
urls = [],
str = '<img class="d-block mx-auto" src="http://www.website.com/wp-content/uploads/2020/05/66189-759x493.jpg" />,
rex = /<img[^>]+src="?([^"\s]+)"?\s*\alt="First slide">/g;
while ( m = rex.exec( str ) ) {
urls.push( m[1] );
}
console.log(urls); // ["http://www.website.com/wp-content/uploads/2020/05/66189-759x493.jpg",...]
但是,我希望 rex 僅獲取 class 輪播項目中的圖像來源:
str = '<div class="carousel-item"> <img class="d-block mx-auto" src="http://www.website.com/wp-content/uploads/2020/05/66189-759x493.jpg" />';
我會跳過正則表達式並使用 DOM 方法來獲取您想要的內容。
使用模板或 DomParser 和 querySelector
var str = '<div class="carousel-item"> <img class="d-block mx-auto" src="http://www.website.com/wp-content/uploads/2020/05/66189-759x493.jpg" /></div>'; var temp = document.createElement("template"); temp.innerHTML = str console.log(Array.from(temp.content.querySelectorAll(".carousel-item img")).map(x => x.src)) var doc = new DOMParser().parseFromString(str, "text/html") console.log(Array.from(doc.querySelectorAll(".carousel-item img")).map(x => x.src))
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