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February 1, 2019 17:12
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adds a new element at the top of developer.mozilla.org
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| // add a new span element to top of mdn | |
| var new_header = document.createElement("span") | |
| var new_header_content = document.createTextNode("new replacement span element") | |
| new_header.appendChild(new_header_content) | |
| var header = document.getElementById('main-header') | |
| var parentDiv = header.parentNode | |
| parentDiv.replaceChild(new_header, header) | |
| // to remove it | |
| let node = document.getElementById('main-header') | |
| if (node.parentNode) { | |
| node.parentNode.removeChild(node) | |
| } |
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