How to convert HTML code into string

HTML to string refers to the process of converting HTML code into a plain text string. In front-end development, this process is very common, because sometimes we need to send HTML code to the back-end for processing, and the back-end can only process plain text data. In addition, sometimes we also need to pass a piece of HTML code as a parameter to the front-end function, but the JavaScript function only accepts string type parameters. Therefore, converting HTML code into strings is a very important skill.

In JavaScript, we can use the innerHTML attribute and innerText attribute to directly obtain the content of the HTML element. But these two attributes can only get the content of the element, not the HTML code itself. If we want to get a string containing HTML elements, we need to use other methods.

One way is to use the DOMParser object. DOMParser is a built-in JavaScript object that converts strings into DOM nodes. We can use DOMParser objects to convert HTML code to DOM nodes and then convert them to strings.

The following is a sample code that uses the DOMParser object to convert HTML into a string:

const htmlString = '<div>Hello world!</div>';
const parser = new DOMParser();
const parsedHtml = parser.parseFromString(htmlString, 'text/html');
const stringHtml = parsedHtml.documentElement.textContent;
console.log(stringHtml); // 输出：Hello world!

First, we define a string containing HTML code: '<div>Hello world!</div>'. We then created a DOMParser object and used the object's parseFromString() method to convert the HTML code into a DOM node. In this example, we identify the parsed string as type HTML. Finally, we convert the DOM node into a string through the textContent attribute, achieving the effect of converting the HTML code into a string.

In addition to DOMParser, we can also use the text() method in the jQuery library to convert HTML code to a string. The following is a sample code that uses jQuery to convert HTML code to a string:

const htmlString = '<div>Hello world!</div>';
const stringHtml = $(htmlString).text();
console.log(stringHtml); // 输出：Hello world!

In this example, we use jQuery's wrapper method to create a jQuery object and call the object's text() Method to get plain text content.

In short, converting HTML code to string is a frequently used technology in the field of front-end development. Both DOMParser and jQuery's text() method can accomplish this task well. In actual development, we need to choose the appropriate method to implement according to the specific situation.

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