function toggleStylesheet(href,onoff){
var existingNode=0 //get existing node:
for(var i = 0; i < document.styleSheets.length; i++){
if( document.styleSheets[i].href && document.styleSheets[i].href.indexOf(href)>-1 ) existingNode = document.styleSheets[i].ownerNode
}
if(onoff == undefined) onoff = !existingNode //toggle on or off if undefined
if(onoff){ //TURN ON:
if(existingNode) return onoff
var link = document.createElement('link');
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = href;
document.getElementsByTagName('head')[0].appendChild(link);
}else{ //TURN OFF:
if(existingNode) existingNode.parentNode.removeChild(existingNode)
}
return onoff
}
//EXAMPLES:
toggleStylesheet('myStyle.css') //toggle myStyle.css on or off
toggleStylesheet('myStyle.css',1) //add myStyle.css
toggleStylesheet('myStyle.css',0) //remove myStyle.css
08 March 2016
Add or remove a CSS stylesheet to HTML using plain vanilla Javascript
This little function will attach or delete a new stylesheet to your html page using good old JS. The second parameter is optional so it will toggle on or off the stylesheet, depending on it's current setting. The function will return true or false (1 or 0), depending on weather the style is on or off. Enjoy!
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