我有一个带有 HTML 代码的变量:
let htmlDocument = '<div id="buildings-wrapper"> \
<div id="building-info"> \
<h2><span class="field-content">Britney Spears' House</span></h2> \
<div class="building-field"> \
<div class="field-content">9999 Hollywood Blvd</div> \
</div> \
<div class="building-field"> \
<div class="field-content">Building Hours: Mon. 07:00-23:00 Tue.-Fri. 06:30-22:00, Sat. 07:30-18:00, Sun. 12:00-18:00 Holidays - Closed</div> \
</div> \
<div class="building-field"> \
<div class="field-content"><a href="http://www.britneyspears.com">Locate on the stars map</a></div> \
</div> \
</div> \
<div id="building-image"> \
<div class="field-content"><img src="../../../../ssc.adm.britneyspears.com/classroomservices/image/viewimage?userEvent=ShowBuildingImage&buildingID=britneyspears" alt="Image of BritneySpears"></div> \
</div> \
</div>';
我想遍历该变量并将这部分 HTML 存储在单独的变量中:
<div class="field-content">9999 Hollywood Blvd</div>
这是我到目前为止所拥有的:
public traverseHTML(htmlDocument: any): any {
let htmlBlock: any;
let divs: any = htmlDocument.getElementsByTagName('div');
for (var i = 0; i < divs.length; i++) {
if (divs[i].getAttribute("id") == "field-content") {
htmlBlock = divs[i];
}
}
return htmlBlock;
}
我确信我的函数存在各种各样的问题,但我无法解决它们,因为我什至无法越过第二行。我收到一条错误消息,指出 htmlDocument.getElementsByTagName
不是函数。如何通过 div 迭代 HTML?
请注意,由于项目规范,我无法使用 JQuery。
编辑:
当我尝试document.createElement('div')
时,我收到document is not Define
,并且当我尝试创建 DOMParser 时,DOMParser is not Defined。我是否错误地设置了类(class)?这是整个类的代码:
import parse5 = require('parse5');
import {ASTNode} from 'parse5';
export default class DSController {
//private parser: DOMParser;
constructor() {
//this.parser = new DOMParser();
}
public traverseHTML(htmlDocument: any): any {
let parser = new DOMParser();
let parsed: any = parser.parseFromString(htmlDocument, "text/html");
let selectParsed: any = parsed.querySelectorAll('field-content')[1];
console.log(selectParsed);
return selectParsed;
/* let element = document.createElement("div");
element.innerHTML = htmlDocument;
console.log(element.querySelectorAll(".field-content")[1]); // <div class="field-content">9999 Hollywood Blvd</div>
*/
}
public parseHTML(): any {
//let document: parse5.ASTNode;
return;
}
}
最佳答案
您可以创建一个元素,然后将此字符串作为 html 插入其中。
然后您可以查询此元素以获取您要查找的内容:
let htmlDocument = '<div id="buildings-wrapper"> \
<div id="building-info"> \
<h2><span class="field-content">Britney Spears House</span></h2> \
<div class="building-field"> \
<div class="field-content">9999 Hollywood Blvd</div> \
</div> \
<div class="building-field"> \
<div class="field-content">Building Hours: Mon. 07:00-23:00 Tue.-Fri. 06:30-22:00, Sat. 07:30-18:00, Sun. 12:00-18:00 Holidays - Closed</div> \
</div> \
<div class="building-field"> \
<div class="field-content"><a href="http://www.britneyspears.com">Locate on the stars map</a></div> \
</div> \
</div> \
<div id="building-image"> \
<div class="field-content"><img src="../../../../ssc.adm.britneyspears.com/classroomservices/image/viewimage?userEvent=ShowBuildingImage&buildingID=britneyspears" alt="Image of BritneySpears"></div> \
</div> \
</div>';
let element = document.createElement("div");
element.innerHTML = htmlDocument;
console.log(element.querySelectorAll(".field-content")[1]); // <div class="field-content">9999 Hollywood Blvd</div>
关于javascript - 如何遍历 HTML,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40455849/