10 examples of 'check if element contains class jquery' in JavaScript

31
function hasClass(element, clazz) {
32
    return (` ${element.className} `).indexOf(` ${clazz} `) > -1;
33
}

112
function hasClass(element, className) {
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    if (element.classList) {
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        return element.classList.contains(className);
115
    } else {
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        return (' ' + element.className + ' ').indexOf(' ' + className + ' ') >
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            -1;
118
    }
119
}

66
export function hasClass(element: HTMLElement, className: string): boolean {
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  if (element.classList) {
68
    return element.classList.contains(className);
69
  } else {
70
    return (element.className.split(" ").indexOf(className) >= 0);
71
  }
72
}

40
function hasClass(element, className) {
41
	var classes = element.className;
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	return classes && new RegExp("(^| )" + className + "($| )").test(classes);
43
}

612
function hasClass($element, targetClass) {
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    var rgx = new RegExp("(?:^|\\s)" + targetClass + "(?!\\S)", "g");
614
615
    if ($element.className.match(rgx)) {
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        return true;
617
    } else {
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        return false;
619
    }
620
}

188
export function hasClass(elem, className) {
189
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    // Check if there is an element and
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	// a Class Name given
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	if( !elem || !className ) return null;
193
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	// Check if it is a list of elements
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	if( elem.length > 1 ) {
196
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		// Run through the list and check if
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		// one of them has not that class Name
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		for( var i=0, max=elem.length; i<max; i++ ) {
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			if( !hasClass( elem[i], className ) ) {
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				return false;
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			}
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		}
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		// Not found - return false
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		return true;
207
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	} else {
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		// Check if browser supports classList
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		// Jep: Check with classList
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		// Nope: Do a regex
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		if( !!elem.classList ) {
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			return elem.classList.contains( className );
214
		} else {
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			var className = " " + className + " ";
216
			return ((" " + elem.className + " ").replace(/[\n\t]/g, " ").indexOf(className) > -1);
217
		}
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	}
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}

53
function addClass(element, classnm) {
54
    var i;
55
    if (element instanceof window.NodeList) {
56
        for (i = 0; i < element.length; i++) {
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            addClass(element[i], classnm);
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        }
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        return;
60
    }
61
    if (!isHTMLElement(element) || typeof classnm !== 'string') {
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        return false;
63
    }
64
    var tmp = classnm.split(' ');
65
    if (tmp.length > 1) {
66
        var success = true;
67
        for (i = 0; i < tmp.length; i++) {
68
            if (!addClass(element, tmp[i])) {
69
                success = false;
70
            }
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        }
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        return success;
73
    }
74
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    if (hasClass(element, classnm)) {
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        return false;
77
    }
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    element.className = trim([element.className, classnm].join(' '));
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    return true;
80
}

1
function ancestorContainsClass( element, className ) {
2
    var contains = false;
3
    var curNode = element;
4
    while (curNode) {
5
        if (typeof curNode.classList !== "undefined") {
6
            if (curNode.classList.contains(className)) {
7
                contains = true;
8
                break;
9
            }
10
        }
11
        curNode = curNode.parentNode;
12
    }
13
    return contains;
14
}

8
function hasClass(elem, className) {
9
    return new RegExp(' ' + className + ' ').test(' ' + elem.className + ' ');
10
}

237
function matchesClass(element: Element, selector: ClassSelector): boolean {
238
  return hasClass(element, selector.name);
239
}