My question involves a browser extension that inserts a div element (along with others) into the page. Is there a method to prevent the page's styles from impacting the appearance of the elements I've added?
One option I've thought about is turning it into an iframe, but I'd rather avoid the additional HTTP request. Overwriting every potential style also feels like overkill, particularly since my additions are simply plain text and hyperlinks.
Although you mentioned a preference to not utilize every style, I thought it may be beneficial to mention a class that could assist others. Essentially, this class can eliminate most inherited or predefined attributes. Simply apply the class to any element you wish to exclude. Here is an illustration:
.clear-styles {
background:none;
border:none;
bottom:auto;
clear:none;
cursor:default;
float:none;
font-size:medium;
font-style:normal;
font-weight:normal;
height:auto;
left:auto;
letter-spacing:normal;
line-height:normal;
max-height:none;
max-width:none;
min-height:0;
min-width:0;
overflow:visible;
position:static;
right:auto;
text-align:left;
text-decoration:none;
text-indent:0;
text-transform:none;
top:auto;
visibility:visible;
white-space:normal;
width:auto;
z-index:auto;
}
Simply add "clear-styles" and it should revert back to its original settings. You can then specify styles below this line to override those in the clear-styles class.
You also have the option to include a wildcard selector in the clear-styles class to target the element's children as well.
.clear-styles,
.clear-styles * { /*...etc */ }
NOTE: Wildcard selectors are supported by IE8+, so if you are designing for IE7 or lower, this may not be applicable.
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