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Paragraphs in List Items Cause Unwanted Line Space


Product Editor for Blazor


The Blazor Editor adds unwanted HTML tags to the content. List items contain <p> tags around each item content. As a result, bullets are spread too far apart.

How can I get rid of the unwanted and unneeded paragraph tags, and the large spacing between list items?

Possible Cause

List items show with some empty space in-between, because the Editor's ProseMirror engine always inserts a <p> tag inside every <li> tag. This is how the engine handles block containers, although HTML standards don't require such an approach.

By default, HTML paragraphs have top and bottom margins.


Here are the possible workarounds to remove extra empty space between list items:

  • Remove the <p> tags via string manipulation of the submitted Editor value.
  • Remove the paragraph margins with CSS in the app stylesheet. This is applicable when the Editor's EditMode is Div and the Editor content is within the same web document as the Editor itself.
  • Remove the paragraphs margins by injecting additional CSS into the Editor's iframe. This is applicable when the Editor's EditMode is Iframe and the Editor content is in a separate web document.

Remove empty space between list items in the Editor

@inject IJSRuntime js

<p>Div mode - the styling of the Editor content depends on the web page</p>
<TelerikEditor @bind-Value="@EditorValue" EditMode="@EditorEditMode.Div" Class="no-list-space" />

    .no-list-space li > p {
        margin: 0;

<p>Iframe mode - the styling of the Editor content depends on the separate web document</p>
<TelerikEditor @bind-Value="@EditorValue" EditMode="@EditorEditMode.Iframe" Class="@EditorClass" />

<!-- The suppress-error attribute allows script tags inside Razor components. -->
<!-- Move this script to a proper place in production environment. -->
<script suppress-error="BL9992">//
    function injectEditorStyles(editorClass, editorStyles) {
        var doc = document.querySelector("." +editorClass + " .k-iframe").contentWindow.document;
        var head = doc.querySelector("head");
        var style = doc.createElement("style");
        style.type = "text/css";
        var css = editorStyles;

    <TelerikButton OnClick="@RemovePTags">Get Editor Value Without P Tags</TelerikButton>

<TelerikTextArea @bind-Value="@EditorValueNoP" />

@code {
    string EditorValue { get; set; } = "<ul><li><p>foo</p></li><li><p>bar</p></li></ul>";
    string EditorStyles { get; set; } = "li > p { margin: 0; }";
    string EditorClass { get; set; } = "no-list-space";

    string EditorValueNoP { get; set; }

    void RemovePTags()
        EditorValueNoP = EditorValue.Replace("<li><p>", "<li>").Replace("</p></li>", "</li>");

    protected override async Task OnAfterRenderAsync(bool firstRender)
        if (firstRender)
            await js.InvokeVoidAsync("injectEditorStyles", EditorClass, EditorStyles);

        await base.OnAfterRenderAsync(firstRender);


It is possible to hack the ProseMirror engine and disable usage of p inside li. However, this will break other features and is not recommended.

See Also

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