在Angular 7/Typescript中将HTML赋值给字符串变量的情况下，如何按类名解析内部html

Question

如何通过类名获取span的内部文本？这里的adr_address变量不是一个DOM元素，而是一个字符串。

var adr_address = '<span class="street-address">12 Stephenson Rd</span>, <span class="locality">Summertown</span>, <span class="region">TN</span> <span class="postal-code">38483-7005</span>, <span class="country-name">USA</span>';

var street-address = ??;
var locality = ??;
var region = ??;
var postal-code = ??;
var country-name = ??

console.log(street-address);
console.log(locality);
console.log(region);
console.log(postal-code);
console.log(country-name);

输出必须如下所示：

斯蒂芬森路12号

夏城

发送

38483-7005

使用

Answer 1

您可以使用DOM解析器

const parser = new DOMParser();
const doc = parser.parseFromString(htmlString, 'text/html');

__ now you can use query selectors on this doc __

Answer 2

您可以使用@ViewChild，例如：

html：

<span #st class="street-address">12 Stephenson Rd</span>

ts：

 @ViewChild('st') st;

 ngAfterViewInit(): void {
 console.log(this.st.nativeElement.innerHTML);

}

Answer 3

这对我来说终于奏效了：

var adr_address = '<span class="street-address">12 Stephenson Rd</span>, <span class="locality">Summertown</span>, <span class="region">TN</span> <span class="postal-code">38483-7005</span>, <span class="country-name">USA</span>';
const parser = new DOMParser();
const doc = parser.parseFromString(adr_address, 'text/html');

var locality = doc.getElementsByClassName('locality')[0].innerHTML.toString(); 
var street-address = doc.getElementsByClassName('street-address')[0].innerHTML.toString();
var region = doc.getElementsByClassName('region')[0].innerHTML.toString();
var postal-code = doc.getElementsByClassName('postal-code')[0].innerHTML.toString();