How to change font-size on innerHTML

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Can I change font-size by javascript like use innerHTML or something else ?

<iframe frameborder="0" src="javascript:'<html></html>';" id="iframe1" title="" style="width: 100%;height: 416px;margin: 0px;padding: 0px;">
<!DOCTYPE html>
<html>
<head>
<style></style>
</head>
<body style="font-size:12px;"> HELLO WORLD </body></html>
</iframe>

It means when iframe load or focus, the font-size must change.

$("#iframe1").contents().find("body").css('font-size','20px');
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<iframe frameborder="0" src="javascript:'<html></html>';" id="iframe1" title="" style="width: 100%;height: 416px;margin: 0px;padding: 0px;">
<!DOCTYPE html>
<html>
<head>
</head>
<body style="font-size:12px;"> HELLO WORLD  </body></html>
</iframe>

HTML DOM Style fontSize Property, The fontSize property sets or returns the font size of the text. Browser Support. Property. fontSize, Yes, Yes, Yes, Yes, Yes  To change the font size in HTML, use the style attribute. The style attribute specifies an inline style for an element. The attribute is used with the HTML <p> tag, with the CSS property font-size. HTML5 do not support the <font> tag, so the CSS style is used to add font size. Just keep in mind, the usage of style attribute overrides any style set globally.

Try:

document.body.style.fontSize="12px";

div.innerHTML font size Solutions, i have a div on my page that will be used to put some text in from a textbox. i was wondering if there is a way to make the font size bigger in the  In CSS font-size is the correct name but in javascript that would trasnlate to font minus style so everywhere in the CSS you have a dash in javascript the property would be camel cased without the dash.

You can add some JavaScript to change the font size.

document.body.style.fontSize = '15px'

innerHTML font size - Javascript, When innerHTML is used for displaying content on a new page it seems to revert back to the default browsers font-size size and family  Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more How to change colour of text when using document.getElementById(“id”).innerHTML

visite w3schools.com where you can get more details with examples

document.body.style.fontSize="20px";

String.prototype.fontsize(), Examples. Using fontsize(). The following example uses string methods to change the size of a string: var worldString  Each time the user selects a new option (that is, each time the onChange event is fired), we run a subroutine named ChangeFontSize. That subroutine does just one thing; it sets the fontSize of the span to the value that was just selected in the dropdown list: DataArea.Style.fontSize = DropDown1.Value.

You can use getElementsByTagName for add style for body.

document.getElementsByTagName("body")[0].style.fontSize = "20px";

document.getElementsByTagName("body")[0].style.fontSize = "20px";
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<style></style>
</head>
<body style="font-size:12px;"> HELLO WORLD </body></html>

How to Change Font Sizes with JavaScript (thesitewizard.com), There are many ways of changing the font size of an element. We will use the simple and direct method of modifying the style property. Let's say  The innerHTML property sets or returns the HTML content (inner HTML) of an element. Change the HTML content, URL, and target of a link:

How to get font properties of particular element in JavaScript , Give a string element and the task is to get the font properties of a particular element using JavaScript. "font-size: 16px; font-family: sans-serif; font-weight: bold;" > innerHTML = str; How to change the ID of element using JavaScript ? Find answers to div.innerHTML font size from the expert community at Experts Exchange

How to change the text of a label using JavaScript ?, Use the innerHTML property to change the text inside the label. The innerHTML property sets or returns the HTML content of an element. Example 1: This example  Hi, Yesterday I got some great help from a few members here, that included using the innerHTML property. When innerHTML is used for displaying content on a new page it seems to revert back to the default browsers font-size size and family regardless of style.

How do you allow user to change font size for all pages?, I can create buttons that allow a user to change the font, font size, and font innerHTML="<style type='text/css'>p\\{font-size:2.6em  I am trying to use the innerHTML method on an input tag and all i get back is a blank string. Here is the code i am useing. javascript function setName(ID){ document.getElementById('searchtit

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