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Editorial Team
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Asked: 2026-06-12T04:27:49+00:00

The base Element object in dart:html has a property elements which is an implementation

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The base Element object in dart:html has a property elements which is an implementation of List<E>. The add method appends elements to the DOM. I would like to prepend or insert an element into the DOM. None of the insert methods in ElementList are implemented. How can I do this?

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1 Answer

  1. Editorial Team

    So lets say you have this HTML snippet:

    <body>
    <div id='test'></div>
</body>

    You can do this to insert an element before the div:

    // Get the sibling that we want to insert before.
final el = query('#test');

// From the parent element, we call insertBefore, referencing the
// sibling that we want to insert the new element before.
document.body.insertBefore(new Element.tag('p'), el);

    Now your HTML will be:

    <body>
    <p></p>
    <div id='test'></div>
</body>
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