iFrame body font-family styling

Within the body tag, I have placed an iFrame:

<body onLoad="iFrameOn();">
    <iframe name="richTextField" id="richTextField" style="border:#000 1px solid; width:700px; height:300px;"></iframe>
</body>

The iFrameOn JavaScript function is structured like this:

function iFrameOn() {
    richTextField.document.designMode = 'On';
    richTextField.document.body.style.fontFamily = "Open Sans","Helvetica Neue",Helvetica,Arial,sans-serif;
}

However, the font within the iFrame does not change as intended. The error console displays a message: "Helvetica is not defined(...)". How can I address this issue so that the specified font is applied to the iFrame?

Thank you for your assistance!

javascripthtmlcssiframefont-family

Answer №1

It is recommended to combine them into a single string,

richTextField.document.body.style.fontFamily = 'Open Sans, Helvetica Neue, Helvetica, Arial, sans-serif';

Answer №2

Modify the style of your iframe by incorporating a font-face declaration. Below is an example code snippet that successfully implemented this change:

var myframe = $('#iframeId');
var myframStyle = myframe[0].contentWindow.document.children[0].children[0].getElementsByTagName('style');
var myframeStyleContent = myframe[0].contentWindow.document.children[0].children[0].getElementsByTagName('style')[0].innerHTML;
var myfontFace = "@font-face {font-family: your-fontname; font-style: normal;font-weight: 400;src: url('your web font url') format('woff2');} body {font-family:your-fontname;}"; 
myframeStyleContent += myfontFace;
myframe[0].contentWindow.document.children[0].children[0].getElementsByTagName('style')[0].innerHTML = myframeStyleContent;

Answer №3

If you want to change the font family in your rich text field, you can use the code snippet below:

richTextField.contentDocument.body.style.fontFamily = '-apple-system, BlinkMacSystemFont, San Francisco, Segoe UI, Roboto, Helvetica Neue, sans-serif';

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