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| <html> | |
| <head> | |
| <style type="text/css"> | |
| #main { padding: 100px; background-color: pink; } | |
| .blue { background-color: blue !important; } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="main">Lorem ipsum dolor!</div> | |
| <script type="text/javascript"> | |
| function $(selector) { | |
| let selectorType = selector.split('').shift(); | |
| let selectorName = selector.substr(1); | |
| let DOMElement = selectDOMElement(); | |
| function selectDOMElement() { | |
| if (selectorType === '#') { | |
| return document.getElementById(selectorName); | |
| } else { | |
| return document.querySelectorAll(selectorName); | |
| } | |
| } | |
| return { | |
| addClass(className) { | |
| DOMElement.classList.add(className); | |
| }, | |
| removeClass(className) { | |
| DOMElement.classList.remove(className); | |
| }, | |
| hasClass(className) { | |
| return DOMElement.classList.contains(className); | |
| }, | |
| toggleClass(className) { | |
| if (this.hasClass(className)) { | |
| this.removeClass(className); | |
| } else { | |
| this.addClass(className); | |
| } | |
| } | |
| } | |
| }; | |
| </script> | |
| </body> | |
| </html> |
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