While doing a search for something else, I stumbled upon this question.
An important point to note is that cssText does not create a new style; rather, it allows you to apply multiple styles at once. The following code snippets are essentially the same:
element.style.cssText = "background-color:yellow;color:red;";
element.style.backgroundColor = "yellow";
element.style.color = "red";
It's crucial to understand that setting cssText will replace any existing element styles. For example, the code below will result in a style equivalent to color:red; and not
background-color:yellow;color:red;
. cssText removes any previous element styles before applying the specified ones:
element.style.backgroundColor = "yellow";
element.style.cssText = "color:red;";
Another thing to keep in mind is that using !important does not make a style immutable. It simply prevents higher specificity styles from taking precedence, as long as it is defined. When you change the background color to blue, you are essentially removing !important from the declaration. To retain it, you need to set your background color as
background-color:blue !important;
.
In summary, if your
background-color:yellow !important;
gets overwritten with
background-color:blue;, there is no direct solution. You could consider creating a timer interval to reset the
yellow !important style every X milliseconds, but managing it can become complex, especially if you might need to change the color later on.
var element = ...;
setInterval(1000, function(){
if (element.style.backgroundColor != "yellow !important") {
element.style.backgroundColor = "yellow !important";
}
});
If these styles are permanent, converting them into CSS rules instead of inline styles may be a better approach. You can still use the !important flag by defining it as a rule:
.bg-yellow {
background-color: yellow !important;
}
element.className = "bg-yellow";