Javascript putting text in div

Element: innerHTML property

The Element property innerHTML gets or sets the HTML or XML markup contained within the element.

To insert the HTML into the document rather than replace the contents of an element, use the method insertAdjacentHTML() .

Value

A string containing the HTML serialization of the element’s descendants. Setting the value of innerHTML removes all of the element’s descendants and replaces them with nodes constructed by parsing the HTML given in the string htmlString.

Exceptions

Thrown if an attempt was made to set the value of innerHTML using a string which is not properly-formed HTML.

Thrown if an attempt was made to insert the HTML into a node whose parent is a Document .

Usage notes

The innerHTML property can be used to examine the current HTML source of the page, including any changes that have been made since the page was initially loaded.

Reading the HTML contents of an element

Reading innerHTML causes the user agent to serialize the HTML or XML fragment comprised of the element’s descendants. The resulting string is returned.

let contents = myElement.innerHTML; 

This lets you look at the HTML markup of the element’s content nodes.

Note: The returned HTML or XML fragment is generated based on the current contents of the element, so the markup and formatting of the returned fragment is likely not to match the original page markup.

Replacing the contents of an element

Setting the value of innerHTML lets you easily replace the existing contents of an element with new content.

Note: This is a security risk if the string to be inserted might contain potentially malicious content. When inserting user-supplied data you should always consider using Element.setHTML() instead, in order to sanitize the content before it is inserted.

For example, you can erase the entire contents of a document by clearing the contents of the document’s body attribute:

This example fetches the document’s current HTML markup and replaces the »

.documentElement.innerHTML = ` $document.documentElement.innerHTML.replace( //g, "<", )> `; 

Operational details

What exactly happens when you set value of innerHTML ? Doing so causes the user agent to follow these steps:

1. The specified value is parsed as HTML or XML (based on the document type), resulting in a DocumentFragment object representing the new set of DOM nodes for the new elements.
2. If the element whose contents are being replaced is a element, then the element’s content attribute is replaced with the new DocumentFragment created in step 1.
3. For all other elements, the element’s contents are replaced with the nodes in the new DocumentFragment .

Appending HTML to an element

Setting the value of innerHTML lets you append new contents to the existing one of an element.

HTML

ul id="list"> li>a href="#">Item 1a>li> li>a href="#">Item 2a>li> li>a href="#">Item 3a>li> ul> 

JavaScript

Please note that using innerHTML to append HTML elements (e.g. el.innerHTML += «link» ) will result in the removal of any previously set event listeners. That is, after you append any HTML element that way you won’t be able to listen to the previously set event listeners.

Security considerations

It is not uncommon to see innerHTML used to insert text into a web page. There is potential for this to become an attack vector on a site, creating a potential security risk.

let name = "John"; // assuming 'el' is an HTML DOM element el.innerHTML = name; // harmless in this case // … name = ""; el.innerHTML = name; // harmless in this case 

Although this may look like a cross-site scripting attack, the result is harmless. HTML specifies that a tag inserted with innerHTML should not execute.

const name = ""; el.innerHTML = name; // shows the alert 

For that reason, it is recommended that instead of innerHTML you use:

• Element.setHTML() to sanitize the text before it is inserted into the DOM.
• Node.textContent when inserting plain text, as this inserts it as raw text rather than parsing it as HTML.

Warning: If your project is one that will undergo any form of security review, using innerHTML most likely will result in your code being rejected. For example, if you use innerHTML in a browser extension and submit the extension to addons.mozilla.org, it may be rejected in the review process. Please see Safely inserting external content into a page for alternative methods.

Examples

This example uses innerHTML to create a mechanism for logging messages into a box on a web page.

JavaScript

function log(msg)  const logElem = document.querySelector(".log"); const time = new Date(); const timeStr = time.toLocaleTimeString(); logElem.innerHTML += `$timeStr>: $msg>
`; > log("Logging mouse events inside this container…"); 

The log() function creates the log output by getting the current time from a Date object using toLocaleTimeString() , and building a string with the timestamp and the message text. Then the message is appended to the box with the class «log» .

We add a second method that logs information about MouseEvent based events (such as mousedown , click , and mouseenter ):

function logEvent(event)  const msg = `Event $event.type> at $event.clientX>, $event.clientY> `; log(msg); > 

Then we use this as the event handler for a number of mouse events on the box that contains our log:

const boxElem = document.querySelector(".box"); boxElem.addEventListener("mousedown", logEvent); boxElem.addEventListener("mouseup", logEvent); boxElem.addEventListener("click", logEvent); boxElem.addEventListener("mouseenter", logEvent); boxElem.addEventListener("mouseleave", logEvent); 

HTML

The HTML is quite simple for our example.

div class="box"> div>strong>Log:strong>div> div class="log">div> div> 

CSS

The following CSS styles our example content.

.box  width: 600px; height: 300px; border: 1px solid black; padding: 2px 4px; overflow-y: scroll; overflow-x: auto; > .log  margin-top: 8px; font-family: monospace; > 

Result

The resulting content looks like this. You can see output into the log by moving the mouse in and out of the box, clicking in it, and so forth.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Node.textContent and HTMLElement.innerText
• Element.insertAdjacentHTML()
• Element.outerHTML
• Element.setHTML
• Parsing HTML or XML into a DOM tree: DOMParser
• Serializing a DOM tree into an XML string: XMLSerializer

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The Ultimate Guide to Adding or Replacing Text Inside a Div Element Using JavaScript

Learn how to efficiently and securely add or replace text inside a div element using JavaScript. Our ultimate guide provides best practices, tips, and tricks for web developers. Improve your web development skills and create better user experiences today.

• Using textContent or insertAdjacentText() method
• Using innerHTML or appendChild() method
• Append Text To Div in JavaScript
• Avoid using document.write() method
• Using CSS to insert text content
• Best practices, tips, and tricks for adding or replacing text inside a div element
• Other code examples for adding or replacing text inside a div element using JavaScript
• Conclusion
• How to put text in div JavaScript?
• Can you put text in a div?
• How to add text in JavaScript dynamically?
• How to insert text in JavaScript?

JavaScript is a popular programming language for web development that allows developers to access and manipulate HTML elements through the DOM. Adding or replacing text inside a div element is a common task in web development, and there are several methods to achieve this. In this blog post, we will cover the best practices, tips, and tricks for adding or replacing text inside a div element using JavaScript.

Using textContent or insertAdjacentText() method

To add or replace text inside a div element, the textContent or insertAdjacentText() method can be used. The textContent property sets or returns the text content of an element, while the insertAdjacentText() method inserts a new text node at the specified position.

One advantage of using the textContent property is its speed and security, as it does not parse HTML tags. On the other hand, the insertAdjacentText() method is useful for inserting text at a specific position.

Here’s an example of how to use the textContent property to add or replace text inside a div element:

let element = document.getElementById("myDiv"); element.textContent = "New text content"; 

And here’s an example of how to use the insertAdjacentText() method to add or replace text inside a div element:

let element = document.getElementById("myDiv"); element.insertAdjacentText("beforeend", "New text content"); 

Using innerHTML or appendChild() method

Another way to append text to a div element is to use innerHTML or appendChild() method. The innerHTML property sets or returns the HTML content of an element, while the appendChild() method appends a new child node to an element.

However, using innerHTML can introduce security risks, so it’s best to use textContent or insertAdjacentText() method instead.

Here’s an example of how to use the innerHTML property to add or replace text inside a div element:

let element = document.getElementById("myDiv"); element.innerHTML = "New text content"; 

And here’s an example of how to use the appendChild() method to add or replace text inside a div element:

let element = document.getElementById("myDiv"); let textNode = document.createTextNode("New text content"); element.appendChild(textNode); 

Append Text To Div in JavaScript

In this javascript tutorial, we are appending text to an element in HTML. We will take value from Duration: 2:48

Avoid using document.write() method

It’s important to avoid using the document.write() method to write text inside a div element, as it can overwrite existing content and cause security vulnerabilities. Instead, use the methods mentioned in subheading 1 and 2 to add or replace text inside a div element.

Using CSS to insert text content

CSS can also be used to insert text content before or after an element. By using the ::before and ::after pseudo-elements, text can be inserted before or after a div element.

Here’s an example of how to use CSS to insert text content before a div element:

And here’s an example of how to use CSS to insert text content after a div element:

Best practices, tips, and tricks for adding or replacing text inside a div element

The best practices for adding or replacing text inside a div element include using textContent or insertAdjacentText() method instead of innerHTML, which can introduce security risks. Tips for adding or replacing text inside a div element include selecting the element by ID, creating a new text node, and appending it to the desired element.

Tricks for adding or replacing text inside a div element include using the replaceChild() method to replace an existing child node.

Common issues with adding or replacing text inside a div element include accidentally overwriting existing content and introducing security vulnerabilities. A cheatsheet for adding or replacing text inside a div element might include example code snippets for using textContent, insertAdjacentText(), innerHTML, and appendChild() methods.

Other code examples for adding or replacing text inside a div element using JavaScript

In Javascript as proof, javascript set text of div

document.getElementById("content").innerHTML = "whatever";

In Javascript , for instance, js insert text into div code sample

var div = document.getElementById('myElementID'); div.innerHTML += "Here is some more data appended";

In Javascript case in point, how to change text of div in javascript code sample

document.getElementById("content").innerHTML = "whatever"; 

Conclusion

Adding or replacing text inside a div element using JavaScript is a common task in web development, and there are several methods to achieve this. The best practices, tips, and tricks provided in this blog post can help developers to add or replace text inside a div element efficiently and securely. By using the methods mentioned in this blog post, developers can improve their web development skills and create better user experiences for their website visitors.

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