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Home / Miscellaneous / Insert an HTML string before the start of the specified element

Insert an HTML string before the start of the specified element

Insert an HTML string before the start of the specified element

Use Element.insertAdjacentHTML() with a position of 'beforebegin' to parse an HTML string (htmlString) and insert it before the start of el.

const insertBefore = (el, htmlString) =>
  el.insertAdjacentHTML('beforebegin', htmlString);

// Example
insertBefore(document.getElementById('myId'), '<p>before</p>');
// <p>before</p> <div id="myId">...</div>

Source

https://www.30secondsofcode.org/js/s/insert-before

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