How to replace entire HTML using JQuery

JQuery is a widely used JavaScript library that provides various methods to simplify DOM manipulation. In web development, it is often necessary to replace the HTML of the entire page. In this article, we will introduce how to replace the entire HTML using JQuery.

1. Basic steps of HTML replacement

In JQuery, the entire HTML replacement needs to complete the following basic steps:

1. Create new HTML code
2. Select the HTML elements that need to be replaced
3. Use JQuery's replaceWith() method to replace HTML

2. Create new HTML code

Before HTML replacement, New HTML code needs to be created. You can save the HTML code in a variable and then use that variable to replace the entire HTML.

For example, we can use the following code to create new HTML:

var newHtml = '<div class="container"> <h1>Hello World!</h1> <p>This is a demo.</p> </div>';

This code defines a new HTML that contains a

with class "container" elements, an

heading and a

paragraph.

3. Select the HTML elements that need to be replaced

In JQuery, you can use various selectors to select the HTML elements that need to be replaced. For example, we can use the following code to select the entire HTML:

var oldHtml = $('html');

This code selects the entire HTML, including the , , and elements.

4. Use JQuery's replaceWith() method to replace HTML

Use the replaceWith() method to replace new HTML with the selected HTML element. For example, we can replace the entire HTML with the following code:

$(oldHtml).replaceWith(newHtml);

This code replaces the new HTML code with the HTML element selected by the selector.

5. Sample code

The following is a complete example that demonstrates how to replace new HTML with the entire HTML:

$(document).ready(function() {

   var newHtml = '<div class="container"> <h1>Hello World!</h1> <p>This is a demo.</p> </div>';

   var oldHtml = $('html');

   $(oldHtml).replaceWith(newHtml);

});

6. Summary

In web development, replacing entire HTML is a common task. Using JQuery, you can easily replace entire HTML without having to manually code JavaScript. Through the above steps, we can easily replace the entire HTML to achieve dynamic effects on the page and improve user experience.

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