javascript tutorial - [Solved-5 Solutions] How to apply !important using .css ? - javascript - java script - javascript array

We 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.)?

We think I've found a real solution. I've made it into a new function:

jQuery.style(name, value, priority); We can use it to get values with .style('name') just like .css('name'), get the CSSStyleDeclaration with .style(), and also set values - with the ability to specify the priority as 'important'. See

Demo

var div = $('someDiv');
console.log(div.style('color'));
div.style('color', 'red');
console.log(div.style('color'));
div.style('color', 'blue', 'important');
console.log(div.style('color'));
console.log(div.style().getPropertyPriority('color'));

Here's the output:

null
red
blue
important

The Function

(function($) {    
  if ($.fn.style) {
    return;
  }

  // Escape regex chars with \
  var escape = function(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
  };

  // For those who need them (< IE 9), add support for CSS functions
  var isStyleFuncSupported = !!CSSStyleDeclaration.prototype.getPropertyValue;
  if (!isStyleFuncSupported) {
    CSSStyleDeclaration.prototype.getPropertyValue = function(a) {
      return this.getAttribute(a);
    };
    CSSStyleDeclaration.prototype.setProperty = function(styleName, value, priority) {
      this.setAttribute(styleName, value);
      var priority = typeof priority != 'undefined' ? priority : '';
      if (priority != '') {
        // Add priority manually
        var rule = new RegExp(escape(styleName) + '\\s*:\\s*' + escape(value) +
            '(\\s*;)?', 'gmi');
        this.cssText =
            this.cssText.replace(rule, styleName + ': ' + value + ' !' + priority + ';');
      }
    };
    CSSStyleDeclaration.prototype.removeProperty = function(a) {
      return this.removeAttribute(a);
    };
    CSSStyleDeclaration.prototype.getPropertyPriority = function(styleName) {
      var rule = new RegExp(escape(styleName) + '\\s*:\\s*[^\\s]*\\s*!important(\\s*;)?',
          'gmi');
      return rule.test(this.cssText) ? 'important' : '';
    }
  }

  // The style function
  $.fn.style = function(styleName, value, priority) {
    // DOM node
    var node = this.get(0);
    // Ensure we have a DOM node
    if (typeof node == 'undefined') {
      return this;
    }
    // CSSStyleDeclaration
    var style = this.get(0).style;
    // Getter/Setter
    if (typeof styleName != 'undefined') {
      if (typeof value != 'undefined') {
        // Set style property
        priority = typeof priority != 'undefined' ? priority : '';
        style.setProperty(styleName, value, priority);
        return this;
      } else {
        // Get style property
        return style.getPropertyValue(styleName);
      }
    } else {
      // Get CSSStyleDeclaration
      return style;
    }
  };
})(jQuery);

The problem is caused by jQuery not understanding the !important attribute, and as such fails to apply the rule. We might be able to work around that problem, and apply the rule by referring to it, via addClass():

.importantRule { width: 100px !important; }

$('#elem').addClass('importantRule');

Or by using attr():

$('#elem').attr('style', 'width: 100px !important');

$('#elem').attr('style', function(i,s) { return s + 'width: 100px !important;' })

We can set the width directly using .width() like this:

$("#elem").width(100);

Updated for comments: We have this option as well, but it'll replace all css on the element, so not sure it's any more viable:

$('#elem').css('cssText', 'width: 100px !important');

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

After reading other answers and experimenting, this is what works for me:

$(".selector")[0].style.setProperty( 'style', 'value', 'important' );

This doesn't work in IE 8 and under, though.