How to apply !important using .css()?

Question

I am having trouble applying a style that is `!important`. I’ve tried: ``` $("#elem").css("width", "100px !important"); ``` This does nothing; no width style whatsoever is applied. Is there a jQuery-ish way of applying such a style without having to overwrite `cssText` (which would mean I’d need to parse it first, etc.)? Edit: I should add that I have a stylesheet with an `!important` style that I am trying to override with an `!important` style inline, so using `.width()` and the like does not work since it gets overridden by my external `!important` style. Also, the value that will override the previous value is computed, so I cannot simply create another external style.

Accepted Answer

Most of these answers are now outdated, IE7 support is not an issue.

The best way to do this that supports IE11+ and all modern browsers is:

```
const $elem = $("#elem");
$elem[0].style.setProperty('width', '100px', 'important');
```

Or if you want, you can create a small jQuery plugin that does this. This plugin closely matches jQuery's own `css()` method in the parameters it supports:

```
/**
 * Sets a CSS style on the selected element(s) with !important priority.
 * This supports camelCased CSS style property names and calling with an object 
 * like the jQuery `css()` method. 
 * Unlike jQuery's css() this does NOT work as a getter.
 * 
 * @param {string|Object<string, string>} name
 * @param {string|undefined} value
 */   
jQuery.fn.cssImportant = function(name, value) {
  const $this = this;
  const applyStyles = (n, v) => {
    // Convert style name from camelCase to dashed-case.
    const dashedName = n.replace(/(.)([A-Z])(.)/g, (str, m1, upper, m2) => {
      return m1 + "-" + upper.toLowerCase() + m2;
    }); 
    // Loop over each element in the selector and set the styles.
    $this.each(function(){
      this.style.setProperty(dashedName, v, 'important');
    });
  };
  // If called with the first parameter that is an object,
  // Loop over the entries in the object and apply those styles. 
  if(jQuery.isPlainObject(name)){
    for(const [n, v] of Object.entries(name)){
       applyStyles(n, v);
    }
  } else {
    // Otherwise called with style name and value.
    applyStyles(name, value);
  }
  // This is required for making jQuery plugin calls chainable.
  return $this;
};
```

```
// Call the new plugin:
$('#elem').cssImportant('height', '100px');

// Call with an object and camelCased style names:
$('#another').cssImportant({backgroundColor: 'salmon', display: 'block'});

// Call on multiple items:
$('.item, #foo, #bar').cssImportant('color', 'red');
```

Example jsfiddle here.

How to apply !important using .css()?

Solution

Problem

Related problems